JM SERIES
OPERATING INSTRUCTIONS
JM-1P Arrayable Loudspeaker
Keep these important operating instructions.
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SYMBOLS USED
These symbols indicate important safety or operating features in this booklet and on the chassis:
!
Dangerous voltages: risk of
electric shock
Important operating instructions
Frame or chassis
Masse, châssis
Protective earth ground
Terre de protection
Masse Schutzleiter
Tierra proteccionista
Pour indiquer les risques
résultant de tensions dangereuses
Pour indequer important
instructions
Wichtige Betriebsanweisung oder
Gebrauchsanleitung
Warnung vor gefährlicher
elektrischer Spannung
Rahmen oder Gehäuse
Armadura o chassis
Para indicar voltajes peligrosos
Instrucciones importantes de
funcionamiento y/o manteniento
IMPORTANT SAFETY INSTRUCTIONS
1. Read these instructions.
2. Keep these instructions.
3. Heed all warnings.
11.Only use attachments/accessories specified by Meyer
Sound.
12.Use only with the caster rails or rigging specified by
Meyer Sound, or sold with the loudspeaker. Handles are
for carrying only.
4. Follow all instructions.
5. Do not use this loudspeaker near water.
6. Clean only with dry cloth.
CAUTION: Rigging should only be done by
experienced professionals.
!
7. Do not block any ventilation openings. Install in accor-
dance with Meyer Sound’s installation instructions.
13.Unplug this loudspeaker during lightning storms or when
unused for long periods of time.
8. Do not install near any heat sources such as radiators,
heat registers, stoves, or other apparatus that produce
heat.
14.Disconnect the mains plug before disconnecting the
power cord from the loudspeaker.
15.Refer all servicing to qualified service personnel. Servic-
ing is required when the loudspeaker has been damaged
in any way, such as when the power-supply cord or plug
has been damaged; liquid has been spilled or objects
have fallen into the loudspeaker; rain or moisture has
entered the loudspeaker; the loudspeaker has been
dropped; or when for undetermined reasons the loud-
speaker does not operate normally.
9. Do not defeat the safety purpose of the grounding-type
plug. A grounding type plug has two blades and a third
grounding prong. The third prong is provided for your
safety. If the provided plug does not fit into your outlet,
consult an electrician for replacement of the obsolete
outlet.
10.Protect the power cord from being walked on or pinched,
particularly at plugs, convenience receptacles, and the
point where they exit from the loudspeaker. The AC
mains plug or appliance coupler shall remain readily
accessible for operation.
CAUTION: To reduce the risk of electric shock,
do not expose this loudspeaker to rain or mois-
!
ture. Do not install the loudspeaker in wet or humid
locations without using weather protection equip-
ment from Meyer Sound.
iii
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SAFETY SUMMARY
English
„
„
Ne pas installer l’haut-parleur dans un
endroit où il y a de l’eau ou une humid-
ité excessive.
„
Um ein Überhitzen dem Lautsprecher
zu verhindern, das Gerät vor direkter
Sonneneinstrahlung fernhalten und
nicht in der Nähe von wärmeabstrahl-
enden
„
To reduce the risk of electric shock, dis-
connect the loudspeaker from the AC
mains before installing audio cable.
Reconnect the power cord only after
making all signal connections.
Ne pas laisser de l’eau ou tout objet
pénétrer dans l’haut-parleur. Ne pas
placer de r´cipients contenant un liquide
sur cet appareil, ni à proximité de celui-
ci.
„
„
Haushaltsgeräten (z.B. Heizgerät oder
Herd) aufstellen.
„
Connect the loudspeaker to a two-pole,
three-wire grounding mains receptacle.
The receptacle must be connected to a
fuse or circuit breaker. Connection to
any other type of receptacle poses a
shock hazard and may violate local
electrical codes.
Im Inneren diesem Lautsprecher herr-
schen potentiell gefährliche Spannun-
gen. Nicht versuchen, das Gerät zu
öffnen. Es enthält keine vom Benutzer
reparierbaren Teile. Reparaturen dürfen
nur von ausgebildetem Kundenienst-
personal durchgeführt werden.
„
„
Pour éviter une surchauffe de l’haut-
parleur, conserver-la à l’abri du soleil.
Ne pas installer à proximité d’appareils
dégageant de la chaleur tels que radia-
teurs ou appareils de chauffage.
Ce haut-parleur contient des circuits
haute tension présentant un danger. Ne
jamais essayer de le démonter. Il n’y a
aucun composant qui puisse être
réparé par l’utilisateur. Toutes les répa-
rations doivent être effectuées par du
personnel qualifié et agréé par le con-
structeur.
„
„
„
Do not install the loudspeaker in wet or
humid locations without using weather
protection equipment from Meyer
Sound.
Español
„
Para reducir el riesgo de descarga eléc-
Do not allow water or any foreign object
to get inside the loudspeaker. Do not
put objects containing liquid on or near
the unit.
trica, desconecte de la red de voltaje el
altoparlante antes de instalar el cable
de señal de audio. Vuelva a conectar la
alimentacion de voltaje una vez efectu-
adas todas las interconexiones de
señalizacion de audio.
To reduce the risk of overheating the
loudspeaker, avoid exposing it to direct
sunlight. Do not install the unit near
heat-emitting appliances, such as a
room heater or stove.
Deutsch
„
Um die Gefahr eines elektrischen
Schlages auf ein Minimum zu
„
Conecte el altoparlante a un tomacorri-
ente bipolar y trifilar con neutro de
puesta a tierra. El tomacorriente debe
estar conectado a la protección de deri-
vación apropiada (ya sea un fusible o un
disyuntor). La conexión a cualquier otro
tipo de tomacorriente puede constituir
peligro de descarga eléctrica y violar los
códigos eléctricos locales.
reduzieren, den Lautsprecher vom
Stromnetz trennen, bevor ggf. ein
Audio-Schnittstellensignalkabel ange-
schlossen wird. Das Netzkabel erst
nach Herstellung aller Signalverbindun-
gen wieder einstecken.
„
This loudspeaker contains potentially
hazardous voltages. Do not attempt to
disassemble the unit. The unit contains
no user-serviceable parts. Repairs
should be performed only by factory-
trained service personnel.
„
Der Lautsprecher an eine geerdete
zweipolige Dreiphasen-Netzsteckdose
anschließen. Die Steckdose muß mit
einem geeigneten Abzweigschutz
(Sicherung oder Leistungsschalter) ver-
bunden sein. Der Anschluß der unter-
brechungsfreien Stromversorgung an
einen anderen Steckdosentyp kann zu
Stromschlägen führen und gegen die
örtlichen Vorschriften verstoßen.
„
„
No instale el altoparlante en lugares
donde haya agua o humedad excesiva.
Français
No deje que en el altoparlante entre
agua ni ningún objeto extraño. No
ponga objetos con líquidos encima de
la unidad ni cerca de ella.
„
Pour réduire le risque d’électrocution,
débrancher la prise principale de l’haut-
parleur, avant d’installer le câble d’inter-
face allant à l’audio. Ne rebrancher le
bloc d’alimentation qu’après avoir
effectué toutes les connections.
„
„
Para reducir el riesgo de sobrecalen-
tamiento, no exponga la unidad a los
rayos directos del sol ni la instale cerca
de artefactos que emiten calor, como
estufas o cocinas.
„
Branchez l’haut-parleur dans une prise
de courant à 3 dérivations (deux pôles
et la terre). Cette prise doit être munie
d’une protection adéquate (fusible ou
coupe-circuit). Le branchement dans
tout autre genre de prise pourrait
entraîner un risque d’électrocution et
peut constituer une infraction à la régle-
mentation locale concernant les instal-
lations électriques.
„
„
Der Lautsprecher nicht an einem Ort
aufstellen, an dem sie mit Wasser oder
übermäßig hoher Luftfeuchtigkeit in
Berührung kommen könnte.
Este altoparlante contiene niveles de
voltaje peligrosos en potencia. No
intente desarmar la unidad, pues no
contiene piezas que puedan ser repar-
das por el usuario. Las reparaciones
deben efectuarse únicamente por parte
del personal de mantenimiento capaci-
tado en la fábrica.
Darauf achten, daß weder Wasser noch
Fremdkörper in das Innere den
Lautsprecher eindringen. Keine
Objekte, die Flüssigkeit enthalten, auf
oder neben die unterbrechungsfreie
Stromversorgung stellen.
iv
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CONTENTS
17
19
32
v
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CONTENTS
vi
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CHAPTER 1: INTRODUCTION
HOW TO USE THIS MANUAL
INTRODUCING THE JM-1P LOUDSPEAKER
Make sure to read these operating instructions in their
entirety before configuring a loudspeaker system with
JM-1P loudspeakers. In particular, pay close attention to
material related to safety issues.
The JM-1P self-powered loudspeaker is a high-Q, arrayable
loudspeaker suited for a wide range of applications. Utilizing
Meyer Sound's patented REM™ technology and trapezoidal
cabinet design, the JM-1P can be deployed in tightly-
packed array clusters to deliver coverage that is propor-
tional to the number of units in the array. While JM-1P point
source arrays are optimized for horizontal installations, they
can also be used vertically when necessary. With its scal-
able coverage and versatile QuickFly® rigging options, the
JM-1P loudspeaker can be used for touring, rental, and
fixed installations.
As you read these operating instructions, you will encounter
the following icons for notes, tips, and cautions:
NOTE: A note identifies an important or useful
piece of information relating to the topic under
discussion.
TIP: A tip offers a helpful tip relevant to the topic
at hand.
CAUTION: A caution gives notice that an
action may have serious consequences and
!
could cause harm to equipment or personnel, or
could cause delays or other problems.
Information and specifications are subject to change.
Updates and supplementary information are available on the
Meyer Sound website:
Meyer Sound Technical Support is available at:
„
„
„
Tel: +1 510 486.1166
Fax: +1 510 486.8356
Email: [email protected]
JM-1P Arrayable Loudspeaker
Boasting a wide operating frequency range of 53 Hz to
18 kHz, the JM-1P delivers a remarkably smooth sound with
ample low-frequency headroom. Designed and manufac-
tured at Meyer Sound headquarters in Berkeley, California,
the JM-1P's drivers include one low-frequency 15-inch long
excursion cone driver, and one high-frequency 4-inch com-
pression driver with an REM manifold coupled to an
extremely accurate horn. The JM-1P is distinguished by its
constant-Q horn that provides a 20-degree horizontal by 60-
degree vertical coverage. The unit's consistent polar
response and trapezoidal enclosure allow for tightly packed
arrays with minimal overlap in high frequencies.
7
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CHAPTER 1: INTRODUCTION
The JM-1P's sophisticated onboard amplification and pro-
cessing produces consistent and predictable results in any
system design. A proprietary two-channel, class AB/H
power amplifier with complementary MOSFET output stages
yields a total power output of 1275 W (2550 W peak). Built-
in signal processing includes an electronic crossover, driver
protection, and correction filters for achieving flat phase and
frequency responses. Each amplifier channel has peak and
rms limiters that prevent driver overexcursion and regulate
voice coil temperatures. Limiting activity is easily monitored
with the rear panel limit LEDs. The optional RMS™ remote
monitoring system provides comprehensive monitoring of
system parameters on a Windows®-based computer.
The optional MTG-JM1 grid suspends vertical arrays of up
to six JM-1Ps.
The JM-1P's end plates include captive GuideALinks™ and
quick-release pins that allow the unit to be easily linked with
other JM-1Ps in arrays. The optional MPA-JM1 pickup plate
suspends JM-1P horizontal arrays of up to four units with
uptilt or downtilt from a single hanging point; two pickup
plates can suspend arrays of up to six units from a single
hanging point or motor using the MTGSB-4B spreader bar.
MTG-JM1 Vertical Grid with Two JM-1Ps
Constructed of premium birch plywood, the durable JM-1P
enclosure is coated with a black-textured, hard-shell finish.
A hex-stamped, steel grille with acoustical black mesh pro-
tects the unit's drivers. Other options include weather pro-
tection and custom color finishes for fixed installations and
applications with specific cosmetic requirements. The
optional MDB-JM1 dolly board transports the JM-1P on
caster wheels; multiple dolly boards can be interlocked to
transport up to three linked JM-1Ps.
JM-1P Horizontal Array with MPA-JM1 Pickup Plates and MTGSB-4B
Spreader Bar
8
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CHAPTER 2: POWER REQUIREMENTS
The JM-1P loudspeaker combines advanced loudspeaker
technology with equally advanced power capabilities.
Understanding power distribution, voltage and current
requirements, as well as electrical safety issues, is critical to
the safe operation of the JM-1P.
THE AC CONNECTORS
The user panel on the back of the JM-1P includes the fol-
lowing PowerCon® AC connectors:
AC POWER DISTRIBUTION
All components in an audio system (self-powered loud-
speakers, processors, etc.) must be properly connected to
an AC power distribution system, ensuring that AC line
polarity is preserved, and that all grounding points are con-
nected to a single node or common point using the same
cable gauge as the neutral and line cables.
JM-1P AC Input (left) and AC Loop Output (right) Connectors
NOTE: Improper grounding connections
between loudspeakers and the rest of the
audio system may produce noise or hum, or cause
serious damage to the input and output stages of the
system’s electronic components.
The AC Input Connector (Blue)
The blue AC Input connector supplies power to the JM-1P.
The connector is rated at 20 amps and uses a PowerCon AC
mains locking connector that prevents accidental discon-
nections. A 10-foot AC power cable, rated at 15 amps, is
included with each loudspeaker. If you replace the included
AC power cable, make sure to use a cable with the appropri-
ate power plug (on the other end) for the area in which you
will operate the unit.
CAUTION: Before applying AC power to any
Meyer Sound self-powered loudspeaker, make
!
sure that the voltage potential difference between
neutral and earth ground is less than 5 V AC.
The AC Input connector also supplies power to any addi-
tional loudspeakers connected to the loudspeaker’s gray
Loop Output connector. Each JM-1P loudspeaker requires
approximately 5 A rms (maximum long-term continuous
current) at 115 V AC for proper operation.
Figure 1 illustrates a basic three-phase AC distribution sys-
tem with the loudspeaker load distributed across the three
phases. All loudspeakers are connected to common neutral
and earth-ground points.
CAUTION: When using the included AC power
cable, do not loop more than two additional
!
JM-1P loudspeakers from the AC Loop Output con-
nector at 115 V (three total for the circuit), and not
more than five at 230 V (six total for the circuit).
The AC Loop Output Connector (Gray)
The gray AC Loop Output connector allows multiple JM-1P
loudspeakers to be looped and powered from a single
power source. Connect the AC Loop Output of the first
loudspeaker to the AC Input of the second, and so forth. The
AC Loop Output uses a PowerCon3 AC mains locking con-
nector that prevents accidental disconnections.
Line 1
Line 2
Line 3
Neutral
Earth Ground
Figure 1: AC Power Distribution System
9
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CHAPTER 2: POWER REQUIREMENTS
The maximum number of loudspeakers that can be looped
from the Loop Output connector is determined by the volt-
age of the power source, the circuit breaker rating, and the
rating of the AC power cable connected to the first JM-1P
loudspeaker.
When wiring international or special-purpose power con-
nectors:
„
„
„
Connect the blue wire to the black terminal, or the termi-
nal marked with an N.
Connect the brown wire to the red terminal, or the termi-
nal marked with an L.
Number of JM-1Ps that Can Be Looped with AC Power
Circuit Breaker/
115 V AC
230 V AC
100 V AC
Connector Rating
Connect the yellow and green wire to the green (or green
and yellow) terminal, or the terminal marked with an E.
15 amps
20 amps
2 looped
(3 total)
5 looped
(6 total)
1 looped
(2 total)
CAUTION: When creating AC power cables
and distribution systems, it is important to pre-
3 looped
(4 total)
7 looped
(8 total)
2 looped
(3 total)
!
serve AC line polarity and connect the earth ground
on both ends of the cable. The JM-1P requires a
grounded connection. Always use a grounded outlet
and plug. It is extremely important that the system be
properly grounded in order to operate safely and
properly. Do not ground-lift the AC cable.
Each JM-1P loudspeaker ships with one AC looping con-
nector for making AC looping cables. Assembled AC loop-
ing cables are available from Meyer Sound (15-inch UL AC
looping cable, PN 28.115.032.01; 0.35 m CE AC looping
cable, PN 28.115.032.02).
CAUTION: Do not exceed the current capabil-
ity of the 20-amp Input connector for the
!
JM-1P VOLTAGE REQUIREMENTS
JM-1P loudspeakers. When looping loudspeakers,
consider the total current draw for all loudspeakers
on the circuit, including the first loudspeaker.
The JM-1P operates safely and continuously when the AC
voltage stays within 95–125 V AC and 208–235 V AC at 50
or 60 Hz. The JM-1P allows any combination of voltage to
GND (neutral-line-ground or line-line-ground).
If the voltage drops below 85 V (brownout), the JM-1P uses
stored power to continue operating temporarily; the loud-
speaker will shut down if the voltage does not rise above the
low boundary before the stored power is used.
AC Connections with VEAM Cabling
The JM-1P can be ordered from the factory with a VEAM all-
in-one connector. VEAM connectors consolidate AC power,
audio, and RMS into a single cable, facilitating easy connec-
tions and quick setups. For more information, see
If the voltage rises above 235 V, the power supply could
become damaged.
CAUTION: The power source for the JM-1P
should always operate within the required volt-
!
POWER CONNECTOR WIRING
age range, at least a few volts from the upper and
lower ranges. This will ensure that AC voltage varia-
tions from the service entry — or peak voltage drops
due to cable runs — will not cause the loudspeaker’s
amplifiers to cycle on and off or cause damage to the
power supply.
The JM-1P requires a grounded outlet. To operate safely
and effectively, it is extremely important that the entire sys-
tem be properly grounded.
Blue = neutral
Brown = hot
Powering Up the JM-1P
When AC power is applied to the JM-1P, its Intelligent AC™
power supply automatically selects the correct operating
voltage, allowing it to be used internationally without manu-
ally setting voltage switches. In addition, Intelligent AC also
suppresses high-voltage transients up to several kilovolts,
filters common mode and differential mode radio frequen-
cies (EMI), and sustains operation temporarily during low-
voltage periods.
Yellow/green =
earth ground
(chassis
AC Cable Wiring Scheme
10
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JM-1P OPERATING INSTRUCTIONS
When powering up the JM-1P, the following startup events
take place over several seconds.
„
Burst Current — The maximum rms current during a
period of around one second. The Burst Current is used
as a rating for magnetic breakers. It is also used for cal-
culating the peak voltage drop in long AC cable runs
according to the following formula:
1. Audio output is muted.
2. Voltage is detected and the power supply mode is auto-
matically adjusted as necessary.
V pk (drop) = I pk x R (cable total)
3. The power supply ramps up.
„
„
Ultimate Short-Term Peak Current — A rating for fast-
reacting magnetic breakers.
4. The green On/Temp LED on the user panel lights up,
indicating the loudspeaker is ready to output audio.
Inrush Current — The spike of initial current encoun-
tered when powering on.
NOTE: The fan remains off at turn-on. It is con-
trolled by audio level and operates only at high
audio levels.
You can use the following table as a guide for selecting
cable gauges and circuit breaker ratings for the system’s
operating voltage.
CAUTION: If the On/Temp LED does not light
up, or the loudspeaker does not output audio
JM-1P Current Draw
!
Current Draw
115 V AC
0.50 A rms
4.55 A rms
230 V AC
0.28 A rms
2.50 A rms
100 V AC
0.56 A rms
5.25 A rms
after ten seconds, remove AC power immediately
and verify that the voltage is within the required
range. If the problem persists, contact Meyer Sound
Technical Support.
Idle Current
Maximum Long-Term
Continuous Current
Burst Current
8.0 A rms
4.1 A rms
9.2 A rms
CAUTION: If either of the loudspeaker’s circuit
breakers trip (the white center buttons disen-
Ultimate Short-Term
Peak Current
20.8 A peak
13.0 A peak
21.6 A peak
!
gage), make sure to disconnect the AC power cable
before resetting the breakers. If necessary, contact
Meyer Sound for repair information.
Inrush Current
7.1 A peak
8.4 A peak
7.1 A peak
The minimum electrical service amperage required by a
JM-1P loudspeaker system is the sum of the Maximum
Long-Term Continuous Current for each loudspeaker. An
additional 30 percent above the minimum amperage is rec-
ommended to prevent peak voltage drops at the service
entry.
JM-1P CURRENT REQUIREMENTS
The current draw for the JM-1P is dynamic and fluctuates as
operating levels change. Since different cables and circuit
breakers heat up at varying rates, it is important to under-
stand the following types of current ratings and how they
affect circuit breaker and cable specifications.
NOTE: For best performance, the AC cable
voltage drop should not exceed 10 V, or
10 percent at 115 V and 5 percent at 230 V. Make
sure that even with AC voltage drops that the AC
voltage always remains within the operating win-
dows.
„
Idle Current — The maximum rms current during idle
periods.
„
Maximum Long-Term Continuous Current — The
maximum rms current during a period of at least 10 sec-
onds. The Maximum Long-Term Continuous Current is
used to calculate temperature increases for cables, to
ensure that cable sizes and gauges conform to electrical
code standards. The current rating is also used as a rat-
ing for slow-reacting thermal breakers. In addition, the
Maximum Long-Term Continuous Current can be used to
calculate the AC looping capability of the JM-1P.
11
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CHAPTER 2: POWER REQUIREMENTS
ELECTRICAL SAFETY ISSUES
Pay close attention to these important electrical and safety
issues.
„
The JM-1P requires a grounded outlet. Always use a
grounded outlet and plug.
Earth ground
Chassis ground
„
Do not use a ground-lifting adapter or cut the AC cable
ground pin.
„
„
Do not exceed the current capability of the 20-amp AC
Input connector for the loudspeaker. When looping loud-
speakers, consider the total current draw for all loud-
speakers on the circuit, including the first loudspeaker.
Make sure the AC power cable for the loudspeaker has
the appropriate power plug (on the other end) for the
area in which you will operate the loudspeaker. In addi-
tion, the AC power cable must be rated for the total cur-
rent draw of all loudspeakers looped from the power
source.
„
„
Do not operate the unit if the power cables are frayed or
broken.
Keep all liquids away from the JM-1P to avoid hazards
from electrical shock.
12
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CHAPTER 3: AMPLIFICATION AND AUDIO
The JM-1P low- and high-frequency drivers are powered by
Input Connector
a proprietary two-channel Meyer Sound amplifier with
MOSFET output stages. The audio signal is processed with
an electronic crossover, correction filters for phase and fre-
quency response, and driver protection circuitry. Each chan-
nel has peak and rms limiters that prevent driver over-
excursion and regulate the temperature of the voice coil.
The female XLR Input connector accepts a balanced audio
signal with an input impedance of 10 kOhm. The connector
uses the following wiring:
„
Pin 1 — 220 kOhm to chassis and earth ground (ESD
clamped)
„
„
„
Pin 2 — Signal (+)
The user panel on the back of the JM-1P has two slots for
modules. The top slot contains an audio input module
(described in this chapter). The bottom slot is reserved for
the optional RMS module, used for connecting to the RMS
Pin 3 — Signal (–)
Case — Earth (AC) ground and chassis
Pins 2 and 3 carry the input as a differential signal. Pin 1 is
connected to earth through a 220 kOhm, 1000 pF, 15 V
clamped network. This circuitry provides virtual ground lift
for audio frequencies while allowing unwanted signals to
bleed to ground. Make sure to use standard, balanced XLR
VEAM CABLING
The JM-1P can be ordered from the factory with a VEAM all- audio cables with all three pins connected on both ends.
in-one connector. VEAM connectors consolidate AC power, Telescopic grounding is not recommended, and shorting an
audio, and RMS into a single cable, facilitating easy connec- input connector pin to the case may cause a ground loop,
tions and quick setups. For more information, see
resulting in hum.
TIP: If unwanted noise or hiss is produced by
the loudspeaker, disconnect its input cable. If
the noise stops, there is most likely nothing wrong
with the loudspeaker. To locate the source of the
noise, check the audio cable, source audio, and AC
power.
THE LOOPING AUDIO INPUT MODULE
The Looping Audio Input module includes input and looping
connectors, and LEDs for monitoring temperature and limit-
ing.
Loop Connector
The male XLR Loop connector allows multiple JM-1P loud-
speakers to be looped from a single audio source. Connect
the Loop output of the first loudspeaker to the Input of the
second, and so forth. The Loop connector is wired in parallel
to the Input connector and transmits the unbuffered source
signal even when the loudspeaker is powered off.
Looping Audio Input Module
To avoid distortion when looping multiple JM-1P loudspeak-
ers, make sure the source device can drive the total load
impedance of the looped loudspeakers. In addition, the
source device must be capable of delivering 20 dBV
(10 V rms into 600 ohms) to yield the maximum peak SPL
over the operating bandwidth of the loudspeaker.
13
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CHAPTER 3: AMPLIFICATION AND AUDIO
To calculate the load impedance for the looped loudspeak-
ers, divide 10 kOhms (the input impedance for a single
JM-1P) by the number of looped loudspeakers. For exam-
ple, the load impedance for 10 JM-1P loudspeakers is
1000 ohms (10 kOhms / 10). To drive this number of looped
loudspeakers, the source device should have an output
impedance of 100 ohms or less. This same rule applies
when looping JM-1P loudspeakers with other self-powered
Meyer Sound loudspeakers and subwoofers.
The JM-1P performs within its acoustical specifications at
normal temperatures when the Limit LEDs are unlit, or if the
LEDs are lit for two seconds or less and then turn off for at
least one second. If an LED remains lit for longer than three
seconds, that channel enters hard limiting where:
„
„
Increases to the input level have no effect.
Distortion increases due to clipping and nonlinear driver
operation.
„
The driver is subjected to excessive heat and excursion,
which will compromise its life span and may eventually
lead to damage over time.
NOTE: Most source devices are capable of
driving loads no smaller than 10 times their
output impedance.
CAUTION: The Limit LEDs indicate when a
safe, optimum level is exceeded. If a JM-1P
loudspeaker begins to limit before reaching the
required SPL, consider adding more loudspeakers to
the system.
!
NOTE: Make sure that all cabling for looped
loudspeakers is wired correctly (Pin 1 to Pin 1,
Pin 2 to Pin 2, and so forth) to prevent the polarity
from being reversed. If one or more loudspeakers in a
system have reversed polarity, frequency response
and coverage can be significantly degraded.
NOTE: The JM-1P loudspeaker uses optical
limiters that add no noise and have no effect
on the signal when the limiters are not engaged and
the Limit LEDs are not lit.
Limit LEDs
The low- and high-frequency drivers for the JM-1P are pow-
ered by separate amplifier channels, each with their own
limiter. Limiting activity is indicated with the two yellow Limit
LEDs. The top LED indicates limiting for the high-frequency
channel and the bottom LED indicates limiting for the low-
frequency channel. When engaged, a channel’s limiter not
only protects the driver, but also prevents signal peaks from
causing excessive distortion in the amplifier’s channel,
thereby preserving headroom and maintaining smooth fre-
quency responses at high levels. When a channel’s level
returns to normal, below the limiter’s threshold, limiting
ceases.
On/Temp LED
When the JM-1P is powered on, its On/Temp LED turns
green. If the temperature of the heat sink reaches 85° C
(185° F), the On/Temp LED changes from green to red and
the limiter threshold is lowered to a safe level to prevent the
system from overheating. Under high temperature condi-
tions the output level is reduced by approximately 6 dB.
When the heat sink temperature decreases to 80° C
(176° F), the On/Temp LED changes from red back to green
and the limiter threshold returns to normal.
NOTE: When the On/Temp LED is red, this is
an indication that the unit is reaching its maxi-
mum dissipation and a reduction in SPL is recom-
mended.
High-frequency limiter LED
Low-frequency limiter LED
TIP: When the JM-1P is connected to an RMS
network, the RMS software provides additional
feedback on the loudspeaker’s operating tempera-
ture. For more information, see Chapter 6, “The RMS
Limit LEDs
14
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JM-1P OPERATING INSTRUCTIONS
CAUTION: To keep the JM-1P from getting too
hot, allow for proper ventilation around the
loudspeaker, especially when it is operated in tightly
packed conditions.
AMPLIFIER COOLING SYSTEM
!
The amplifier for JM-1P uses natural convection for cooling
at low to moderate audio levels; for high audio levels, it uses
Meyer Sound’s proprietary QuietCool fan technology to pre-
vent overheating. The QuietCool™ fan only engages at high
audio levels, making it virtually inaudible.
CAUTION: In the unlikely event that the heat
sink temperature for the JM-1P reaches 95° C
!
(203° F), the loudspeaker will automatically shut
down until AC power is removed to allow the heat
sink to cool. If after cooling and reapplying AC power
the loudspeaker shuts down again, contact Meyer
Sound for repair information.
QuietCool Fan Technology
CAUTION: The heat sink for the JM-1P can
reach temperatures of up to 85° C (185° F) dur-
!
ing extreme operation. Use extreme caution when
approaching the rear of the loudspeaker.
15
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CHAPTER 3: AMPLIFICATION AND AUDIO
16
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CHAPTER 4: ADDING SUBWOOFERS TO A JM-1P LOUDSPEAKER SYSTEM
700-HP subwoofers can be added to JM-1P loudspeaker
systems to enhance the low-frequency response and
THE GALILEO LOUDSPEAKER MANAGEMENT
SYSTEM
increase the overall acoustic power of the system in the low-
Meyer Sound’s Galileo® loudspeaker management system is
est frequencies. The ideal ratio of JM-1P loudspeakers to
a comprehensive solution for driving and aligning loud-
700-HP subwoofers depends on the frequency content of
speaker systems, especially those comprised of Meyer
the source material and headroom required for low frequen-
Sound self-powered loudspeakers. The system is available
cies.
in two hardware configurations:
Table 2: Recommended Ratio of JM-1Ps to Subwoofers
„
The Galileo 616 is a two-space rack unit with six inputs
and 16 low-latency outputs. Processing for the outputs
includes gain, polarity, delay, high- and low-pass filters,
equalization (parametric and TruShaping), and atmo-
spheric correction.
Sub-
woofer
Frequency
Response
Recommended Ratio
(Number of JM-1Ps per Subwoofer)
700-HP 30 Hz–125 Hz
4 dB
„
„
2 x 1 for normal applications
3 x 2 for bass-heavy applications
requiring additional low-frequency
headroom
700-HPs can be added to JM-1P systems by daisy-chaining
them to JM-1P loudspeakers. Full-range signals can be
connected directly to Meyer Sound self-powered loud-
speakers because the loudspeakers have built-in active
crossovers. In more complex systems, subwoofers should
be integrated using line drivers or digital signal processor to
send multiple outputs to each sub-system. In addition, you
can use low-cut filters to flatten the overall frequency
response of the system while increasing the JM-1P head-
room in the lower frequencies.
Galileo 616
„
The Galileo 408 shares the same 24-bit, 96 kHz audio
quality and 32-bit floating point internal processing as
the Galileo 616, though with fewer inputs and outputs.
1
2
3
4
5
6
7
8
SIGNAL
/
CLIP
MUTE
INPUT
OUTPUT
Galileo 408
NOTE: When JM-1P loudspeakers and
700-HP subwoofers are daisy-chained using
the JM-1P’s Loop connector, the result is a fairly flat
frequency response. However, the response will show
an increase in the 60 Hz – 200 Hz range where the
loudspeaker and subwoofer overlap at certain ratios
All system parameters for the Galileo 616 and Galileo 408
can be configured from the extensive Compass™ software
running on a Windows or Mac® computer. The Galileo 616
can also be configured from its intuitive front panel controls.
The Galileo system interfaces seamlessly with Meyer
Sound’s SIM® 3 audio analyzer.
NOTE: If the 700-HP exhibits limiting (its Limit
LED lights) before reaching the required SPL,
consider adding more subwoofers to meet the SPL
requirements without exposing the drivers to exces-
sive heat and excursion.
TIP: The Galileo 616 and Galileo 408 include
presets optimized for JM-1P loudspeaker sys-
tems.
TIP: MAPP Online Pro™ can be used to accu-
rately predict the appropriate loudspeaker and
subwoofer integration in systems, complete with cov-
erage data, system delay and equalization settings,
rigging information, and detailed design illustrations.
For more information, see “MAPP Online Pro” on
17
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CHAPTER 4: ADDING SUBWOOFERS TO A JM-1P LOUDSPEAKER SYSTEM
USING DIGITAL SIGNAL PROCESSORS
Full-range signals can be connected directly to Meyer
Sound self-powered loudspeakers because the loudspeak-
ers have built-in active crossovers. External crossovers and
digital signal processors are optional and should be used
with caution as they can introduce phase shifts that cause
destructive cancellations.
If a digital signal processor is used, both the JM-1P loud-
speakers and subwoofer should be driven from the same
processor to keep their delay times the same. Otherwise a
phase shift between the JM-1Ps and subwoofer may be
encountered. In addition, you should verify the delay time
between channels: some digital signal processors may incur
channel-to-channel delays when the processor is near max-
imum throughput, which becomes more likely as the number
of filters in use by the processor is increased.
Third-order filters (and higher) are not recommended. If they
must be used, they should be used cautiously, since they
may cause phase shifts that deteriorate the impulse
response; in addition, their higher roll-off may also interfere
with crossover interaction.
TIP: To address the collective concerns of sys-
tem design verification, subwoofer integration,
digital signal processors, delay systems, and acousti-
cal conditions, a measurement system like Meyer
Sound’s SIM 3 is strongly recommended.
18
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CHAPTER 5: QUICKFLY RIGGING
The JM-1P loudspeaker is compatible with Meyer Sound’s
QuickFly system, a comprehensive collection of custom-
designed rigging, flying, and mounting options. Comprised
of rugged, reliable, and easy-to-configure components,
QuickFly lets you deploy JM-1P loudspeakers as arrays at
precise angles to take full advantage of their directional
components. The top and bottom plates for the JM-1P cab-
inets are constructed of heavy-duty, high-strength, corro-
sion-resistant 6061-T6 aluminum and include threaded
metric holes (for M10 screws) for easy connection to Quick-
Fly rigging and third-party mounting options.
THE JM-1P GUIDEALINKS
The JM-1P is equipped with GuideALinks on its four right cor-
ners that attach to an adjacent JM-1P with the links inserted
in the left corner slots of the linked unit. GuideALinks are
extended and retracted with front and rear knobs. The links
are secured to the linked JM-1P with the quick-release pins
included with each loudspeaker. GuideALinks are also used
when flying JM-1Ps from the MTG-JM1 vertical grid.
Important Safety Considerations!
When installing Meyer Sound loudspeakers, the following
precautions should always be observed:
„
All Meyer Sound products must be used in accordance
with local, state, federal, and industry regulations. It is
the owner’s and user’s responsibility to evaluate the reli-
ability of any rigging method for their application. Rigging
should only be carried out by experienced professionals.
„
„
Use mounting and rigging hardware that has been rated
to meet or exceed the weight being hung.
Make sure to attach mounting hardware to the building's
structural components (studs or joists), and not just to
the wall surface. Verify that the building's structure and
the anchors used for the installation will safely support
the total weight of the mounted loudspeakers.
„
„
Use mounting hardware appropriate for the surface
where the loudspeaker will be installed.
Make sure bolts and eyebolts are tightened securely.
Meyer Sound recommends using Loctite® on eyebolt
threads and safety cables.
„
Inspect mounting and rigging hardware regularly. Imme-
diately replace any worn or damaged components.
JM-1P GuideALinks
CAUTION: When moving and linking JM-1Ps,
avoid placing fingers between the units to pre-
!
vent injury.
19
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CHAPTER 5: QUICKFLY RIGGING
The JM-1P Quick-Release Pins
Linking JM-1Ps
Each JM-1P ships with four quick-release pins that secure
the units when they are linked. When inserting and removing
the pins, press the button at the top of the pin to disengage
it. When inserted in the GuideALink holes (in the front left
corners and rear right corners), the pins latch and lock to the
links inserted into the corner slots.
To link JM-1Ps:
1. Place the JM-1Ps next to each other on a flat surface
and align the adjacent back corners so they are as close
as possible to each other.
Rear Quick-Release Pin, GuideALink Inserted (Left); GuideALink Not
Present (Right)
When the GuideALinks are not present in the corner slots,
the quick-release pins should be removed from the corner
link holes and placed in their stowed location: in the front,
just to the left of the top and bottom GuideALink knobs; and
in the rear, in the top and bottom center holes.
2. Face the rear of the loudspeakers and slide the top and
bottom rear GuideALink knobs to the left to insert the
links into the corner slots of the adjacent loudspeaker.
Stow quick-release pin here
Stowed Quick-Release Pin, Front Bottom
Stow quick-release pin here
Stowed Quick-Release Pin, Rear Bottom
20
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JM-1P OPERATING INSTRUCTIONS
3. Secure the rear GuideALinks with the quick-release pins
stored at the center top and center bottom of the loud-
speaker. The pins can be inserted top down or bottom
up.
THE MPA-JM1 PICKUP PLATE
The optional MPA-JM1 pickup plate suspends JM-1P hori-
zontal arrays with uptilt or downtilt. A single pickup plate
supports 1–4 loudspeakers. Two pickup plates support 5–6
loudspeakers. The pickup plate comes with M10 knobs,
bolts, and washers for securing the plate to the JM-1P.
Bolts are recommended for fixed installations, while knobs
are recommended for touring and portable applications.
4. Face the front of the loudspeakers and position the loud-
speakers so their adjacent front corners are as close as
possible to each other. The previously attached rear
GuideALinks act as a hinge.
5. Slide the top and bottom front GuideALink knobs to the
right to insert the links into the corner slots of the adja-
cent loudspeaker.
2.00
[51 mm]
23.00
[584 mm]
Ø0.81 (x12)
[Ø21 mm]
10.87
[276 mm]
5.95
[151 mm]
Ø0.47 (x4)
[Ø12 mm]
MPA-JM1 Pickup Plate Dimensions; Weight, 16 lbs (7.26 kg)
The MPA-JM1 has a row of 12 hanging points in the center
of the plate. When suspending the pickup plate from a sin-
gle hanging point, the location of the hanging point deter-
mines the uptilt or downtilt of the suspended JM-1Ps. For
greater control, two or more hanging points can be used.
6. Secure the front GuideALinks with the quick-release pins
stored at the right top and right bottom of the loud-
speaker. The pins are inserted from the front.
CAUTION: Routine maintenance inspections
of the JM-1P should include a check of all
!
GuideALink knobs. Rotate each knob counterclock-
wise to make sure they are tight. If a knob turns, reset
it in the link with Loctite 290 and let it cure for 48
hours. Retest the link before the unit is flown.
MPA-JM1 Pickup Plate with JM-1P
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CHAPTER 5: QUICKFLY RIGGING
NOTE: When using M10 knobs to secure the
MPA-JM1 pickup plate to the JM-1P, the sec-
ond hanging point from the rear is inaccessible.
„
For arrays of three JM-1Ps (with 60 degrees of horizontal
coverage), attach the single pickup plate to the second
loudspeaker.
JM-1P Arrays with a Single Pickup Plate
A single MPA-JM1P pickup plate can suspend arrays of 2–4
loudspeakers:
„
For arrays of two JM-1Ps (with 40 degrees of horizontal
coverage), attach the single pickup plate between the
two loudspeakers.
MPA-JM1 Pickup Plate with Three JM-1Ps
„
For arrays of four JM-1Ps (with 80 degrees of horizontal
coverage), attach the single pickup plate between the
third and fourth loudspeaker.
MPA-JM1 Pickup Plate with Two JM-1Ps
MPA-JM1 Pickup Plate with Four JM-1Ps
TIP: For greater control and stability, use two
MPA-JM1 pickup plates for arrays of four
JM-1Ps.
22
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JM-1P OPERATING INSTRUCTIONS
„
For arrays of six JM-1Ps (with 120 degrees of horizontal
coverage), attach the two pickup plates to the second
and fifth loudspeakers.
JM-1P Arrays with Two Pickup Plates
Two MPA-JM1 pickup plates can suspend arrays of 4–6
loudspeakers:
„
For arrays of four JM-1Ps (with 80 degrees of horizontal
coverage), attach the two pickup plates between the first
and second, and third and fourth loudspeakers.
Two MPA-JM1 Pickup Plates with Six JM-1Ps
The MTGSB-4B Spreader Bar
The optional MTGSB-4B spreader bar can suspend two
MPA-JM1P pickup plates from a single motor point. Six hang-
ing points are provided at each end of the spreader bar to
adjust the spread between the pickup plates. The MTGSB-B
spreader bar includes shackles and connecting links.
Two MPA-JM1 Pickup Plates with Four JM-1Ps
„
For arrays of five JM-1Ps (with 100 degrees of horizontal
coverage), attach the two pickup plates to the second
and fourth loudspeakers.
Two MPA-JM1 Pickup Plates with Five JM-1Ps
Two MPA-JM1 Pickup Plates with Six JM-1Ps Suspended from the
MGTSB-4B Spreader Bar
23
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CHAPTER 5: QUICKFLY RIGGING
The MTG-JM1 vertical grid has a row of nine hanging points
in the center of the grid. Two additional attachment points
are located at the left and right rear corners of the grid to
provide additional control and stability.
THE MTG-JM1 VERTICAL GRID
The optional MTG-JM1 vertical grid suspends JM-1P verti-
cal arrays of up to six units. The grid was designed specifi-
cally for the JM-1P and is compatible with the GuideALinks
and quick-release pins included with the JM-1P.
29.00
[737 mm]
3.00
[76 mm]
Ø0.94 (x9)
[Ø24 mm]
37.39
34.64
[950 mm]
[880 mm]
MTG-JM1 Vertical Grid with Three JM-1Ps
MTG-JM1 Vertical Grid Dimensions; Weight, 47 lbs (21.32 kg)
Rotating the Meyer Sound Logo
To accommodate the orientation of the JM-1P, the Meyer
Sound logo on the unit’s grille frame can be rotated.
The MTG-JM1 vertical grid comes with four quick-release
pins for securing the JM-1P connected directly to the grid.
To secure the front GuideALinks, the quick-release pins are
inserted at the front of the grid. To secure the rear
GuideALinks, the pins are inserted from the inside of the
grid. Additional JM-1Ps in the array are secured with the
quick-release pins included with each loudspeaker.
To rotate the Meyer Sound logo on the JM-1P grille frame:
„
Pull up on the logo, rotate it to the desired position, and
release.
MTG-JM1 Vertical Grid with JM-1P
24
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JM-1P OPERATING INSTRUCTIONS
THE MDB-JM1 DOLLY BOARD
The optional MDB-JM1 dolly board transports the JM-1P on
caster wheels. Up to three dolly boards can be interlocked
for transporting up to three linked JM-1Ps. The interlocked
dolly boards can be oriented normally with all three units
facing the same direction, or they can be staggered to
occupy less space during transport.
12.19
[310 mm]
42.20
[1072 mm]
16.40
[417 mm]
30.63
[778 mm]
21.88
[556 mm]
50.33
[1278 mm]
6.77
[172 mm]
32.97
[838 mm]
13.43
[341 mm]
MDB-JM1 Dolly Board Dimensions
Dimensions for Three MDB-JM1 Dolly Boards, Normal
40.64
[1032 mm]
42.21
[1072 mm]
44.58
[1132 mm]
MDB-JM1 Dolly Board with JM-1P
31.53
[801 mm]
TIP: The JM-1Ps can remain in their MDB-JM1
dolly boards during performances. When doing
so, make sure the boards’ wheels are securely
blocked so the units won’t move their positions.
Dimensions for Three MDB-JM1 Dolly Boards, Staggered
25
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CHAPTER 5: QUICKFLY RIGGING
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CHAPTER 6: THE RMS REMOTE MONITORING SYSTEM
An optional RMS remote monitoring system module can be
installed in the JM-1P, allowing it to be connected to an
THE RMS SOFTWARE
The optional RMS software provides extensive system sta-
RMS network. RMS allows real-time monitoring of multiple
Meyer Sound self-powered loudspeakers from a Windows-
based computer. The RMS host computer communicates
with Meyer Sound loudspeakers (equipped with RMS mod-
ules) via a simple twisted pair network, or an Ethernet net-
work using an FT-10 to Ethernet adapter.
tus and performance data for each loudspeaker, including
amplifier voltage, limiting activity, power output, driver sta-
tus, as well as mute and solo capability. Loudspeakers are
added to the RMS network and assigned a node name dur-
ing a one-time commissioning procedure where the loud-
speaker is identified by either entering its unique Neuron ID,
or by pressing its Service button.
NOTE: For the latest RMS system require-
ments, go to the Meyer Sound website
NOTE: RMS-equipped loudspeakers include a
Mute Jumper that can be installed to enable
the loudspeaker’s mute and solo capability. Meyer
Sound currently ships RMS-equipped loudspeakers
with the Mute Jumper installed. These mute-enabled
loudspeakers can be identified by the blue “ME”
sticker on the face of the RMS module. Older RMS-
equipped loudspeakers can easily be mute-enabled
by installing the Mute Jumper. For more information,
refer to the RMS User Guide.
RMS Add Loudspeaker Dialog Box
NOTE: The RMS software allows you to dis-
able Mute and Solo functions to eliminate any
possibility of accidentally muting loudspeakers. Mute
and solo capability can also be disabled by removing
the Mute Jumper from RMS modules. For more infor-
mation, refer to the RMS User Guide.
Once loudspeakers are identified on the RMS network, they
appear in the RMS software as icons and views; they are
also automatically added to the RMS database on the host
computer.
NOTE: RMS does not control AC power.
JM-1P RMS Icon
27
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CHAPTER 6: THE RMS REMOTE MONITORING SYSTEM
The RMS software displays all loudspeakers on the network
in a panel with icons, Meter views, and Text views that can
be customized to suit your needs. Loudspeaker data is
updated 2–5 times per second. Individual loudspeakers can
be physically identified with the Wink option in RMS, which
lights the Wink LED on the RMS module for that particular
loudspeaker. Conversely, a loudspeaker can be identified in
the RMS software by pressing the Service button on the
loudspeaker’s RMS module.
THE RMS MODULE
The RMS module is installed in the bottom slot of the user
panel on the back of the Meyer Sound loudspeaker. The
RMS user panel has three LEDs, two buttons, and two Net-
work connectors.
RMS Module
NOTE: The LEDs and buttons on the RMS user
panel are used exclusively by RMS and have
no effect on the acoustical or electrical activity of the
JM-1P loudspeaker.
Service LED (Red)
The red Service LED provides the following feedback:
„
When unlit, the loudspeaker is successfully connected to
the network and commissioned.
„
When blinking once every two seconds, the loudspeaker
is connected to the network but not yet commissioned in
the RMS software.
RMS User Panel
Loudspeaker icons and views can be arranged to represent
how the loudspeakers have been deployed in the system.
Multiple panels can be saved and recalled for specific per-
formances and venues.
„
When lit continuously, the loudspeaker’s RMS hardware
has failed and may indicate that the module has been
damaged (contact Meyer Sound Technical Support).
NOTE: The Service LED on the RMS user
panel is used exclusively by RMS and has no
effect on the acoustical or electrical activity of the
JM-1P loudspeaker.
NOTE: When the heat sink for the JM-1P
reaches 85° C (185° F), the On/Temp LED turns
red, while its loudspeaker icon in the RMS software
turns yellow — indicating the loudspeaker is running
hot, but still within safe operating limits. Make sure
that the loudspeaker is properly ventilated.
Service Button
Pressing the Service button identifies the loudspeaker on
the RMS network and notifies the RMS software that the
loudspeaker is connected. You can simultaneously press the
Reset and Service buttons to reset the RMS module and
decommission the loudspeaker from the network (see
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JM-1P OPERATING INSTRUCTIONS
Wink LED (Green)
The green Wink LED lights when a signal is sent from the
RMS software by clicking the Wink button on the loud-
speaker’s icon or on its Text view. This is useful for identify-
ing the physical loudspeaker corresponding to a
loudspeaker icon in the RMS software.
Reset Button
Pressing the Reset button causes the RMS module’s firm-
ware to reboot; this will not affect whether the loudspeaker
is commissioned (which is stored in flash memory). You can
simultaneously press the Reset and Service buttons to reset
the RMS module and decommission the loudspeaker from
Activity LED (Green)
The green Activity LED flashes continuously when the loud-
speaker has been successfully commissioned.
Network Connectors
The two bi-directional Weidmuller locking connectors trans-
fer data to and from the RMS network. Two connectors are
provided to allow for easy connection of multiple (daisy-
chained) loudspeakers on the network.
RESETTING THE RMS MODULE
You can use the Reset and Service buttons to reset the RMS
module, which will cause the module to be decommissioned
from the network.
To reset the RMS module:
1. Press and hold the Service button for 10 seconds.
2. While continuing to hold down the Service button, press
and hold the Reset button for 5 seconds.
3. After releasing the Reset button, continue holding down
the Service button for 5 seconds. The RMS module is
reset and the loudspeaker is decommissioned. The RMS
module’s red Service LED blinks.
29
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CHAPTER 6: THE RMS REMOTE MONITORING SYSTEM
30
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CHAPTER 7: SYSTEM DESIGN AND INTEGRATION TOOLS
Meyer Sound offers two comprehensive tools to assist with
the acoustical and functional requirements of system design
and optimization. This chapter introduces you to MAPP
Online Pro, Meyer Sound’s patented online acoustical pre-
diction tool, and SIM 3, a comprehensive system for mea-
surement and analysis.
detailed design illustrations. MAPP Online Pro’s accurate,
high-resolution predictions ensure that systems will perform
as expected, thereby eliminating unexpected coverage
problems and minimizing on-site adjustments.
The key to the accuracy of MAPP Online Pro’s predictions is
its exhaustive database of Meyer Sound loudspeaker mea-
surements. Performance predictions for each loudspeaker
are based on 360 1/48th-octave-band measurements taken
with a SIM audio analyzer in the Meyer Sound anechoic
chamber. The extraordinary consistency between Meyer
Sound loudspeakers guarantees that predictions from
MAPP Online Pro will closely match their actual perfor-
mance.
MAPP ONLINE PRO
MAPP Online Pro is a powerful, cross-platform, Java-based
application for accurately predicting the coverage pattern,
frequency response, impulse response, and maximum SPL
output of single or arrayed Meyer Sound loudspeakers.
Residing on your local computer, the MAPP Online Pro client
lets you configure Meyer Sound loudspeaker systems and
define the environment in which they will operate, including
air temperature, pressure, humidity, and even the location
and composition of walls. CAD (DXF) files containing
detailed venue information can also be imported.
MAPP Online Pro predictions are requested by the client
software and sent via the Internet to the high-speed Meyer
Sound servers where high-resolution (magnitude and phase)
polar data is processed with sophisticated acoustical pre-
diction algorithms. The resulting predictions are then
returned to and displayed on the local computer running the
MAPP Online Pro client software.
MAPP Online Pro Applications
With MAPP Online Pro, you can:
■
■
■
Simulate different loudspeaker configurations to refine
system design and zero-in on the best coverage for
intended audience areas
Monitor loudspeaker interactions to locate destructive
interferences so that loudspeakers can be re-aimed and
repositioned as necessary
Place microphones anywhere in the sound field and pre-
dict their frequency response, impulse response, and
sound pressure
■
■
Determine delay settings for fill loudspeakers
Try out virtual Galileo equalization to determine optimum
real-world settings for the best system response
■
■
Automatically calculate load information for arrays to
determine rigging capacities, front-to-back weight distri-
bution, and center of gravity
MAPP Online Pro
Generate and export system images for client presenta-
tions
Whether planning for fixed installations or tours with multiple
venues, sound system designers can use MAPP Online Pro
to accurately predict the appropriate loudspeaker deploy-
ment for each job, complete with coverage data, system
delay and equalization settings, rigging information, and
31
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CHAPTER 7: SYSTEM DESIGN AND INTEGRATION TOOLS
Using MAPP Online Pro
Source Independent Measurement Technique
MAPP Online Pro is compatible with the following operating
systems:
The SIM 3 audio analyzer implements Meyer Sound’s source
independent measurement technique, a dual-channel
method that accommodates statistically unpredictable exci-
tation signals. Any excitation signal within a desired fre-
quency range can be used to obtain highly accurate
measurements for acoustical or electronic systems. For
example, concert halls and loudspeaker systems can be
captured during a performance and used as a SIM 3 test
signal, so you can:
■
■
■
■
Windows
®
Linux
®
Unix
®
Mac OS 10.4 or later
Additional system requirements and recommendations are
available on the MAPP Online Pro website:
■
View measurement data as amplitude versus time
(impulse response) or amplitude and phase versus fre-
quency (frequency response)
■
■
Utilize a single-channel spectrum mode
Downloading and Installing MAPP Online Pro
View frequency domain data with a logarithmic fre-
quency axis
To use MAPP Online Pro, you can register at the following
link:
■
Determine and internally compensate for propagation
delays using the SIM 3 Delay Finder
register/
After entering your registration information, an email will be
sent to you with your user name, password, and the MAPP
Online Pro download location. On-screen instructions will
guide you through the download and installation process.
SIM 3 Applications
SIM 3’s main applications are testing and aligning loud-
speaker systems, which entails:
The MAPP Online Pro client software is regularly upgraded
to add support for the latest Meyer Sound loudspeakers, as
well as to add feature enhancements. Most upgrades are
downloaded automatically when logging on to a MAPP
Online Pro session. The MAPP Online Pro database includes
nearly all of the current Meyer Sound loudspeakers, sub-
woofers, and processors.
■
Measuring propagation delays between subsystems to
determine appropriate polarities and delay times
■
Measuring variations in frequency response caused by
the acoustical environment and the placement and inter-
action of loudspeakers to determine corrective equaliza-
tion
■
■
Optimizing subwoofer integrations
Optimizing loudspeaker arrays
THE SIM 3 MEASUREMENT SYSTEM
SIM 3 can also be used in the following applications:
The SIM 3 audio analyzer is a high-resolution audio mea-
surement system comprised of software, hardware, micro-
phones, and accessory cables. SIM 3 is optimized for
measuring audio frequencies with resolutions up 1/48th of
an octave, allowing you to apply precise corrections to bal-
ance system response using frequency and phase domain
information.
■
■
■
■
■
■
Microphone calibration and equalization
Transducer evaluation and correction
Echo detection and analysis
Vibration analysis
Architectural acoustics
Underwater acoustics
32
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APPENDIX A: OPTIONAL VEAM MULTIPIN CONNECTOR
The JM-1P can be ordered from the factory with a VEAM all- For complete wiring conventions and pin-outs for AC, audio,
in-one connector. VEAM connectors consolidate AC power,
and RMS connections, refer to the Meyer Sound document
audio, and RMS into a single cable, facilitating easy connec- VEAM Cable Wiring Reference (PN 06.033.113.01).
tions and quick setups.
Meyer Sound offers the VIM-4 VEAM interface module with
JM-1P loudspeakers require a grounded outlet. It is very
important that the system be properly grounded in order to
ing for the creation of power cables and distribution systems
for JM-1P loudspeakers equipped with VEAM multipin con-
nectors.
four VEAM connectors in the front and a single-phase
IEC 309 32-amp connector in the rear to distribute power,
audio, and RMS to JM-1P loudspeakers equipped with
VEAM connectors.
Line (brown)
Ground (green/yellow)
Neutral (blue)
Figure 3: VEAM Multipin Connector Pin-Outs for Power
VIM-4 Module, Front and Rear Panels
33
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APPENDIX A: OPTIONAL VEAM MULTIPIN CONNECTOR
34
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APPENDIX B: OPTIONAL RAIN HOODS
A weather-protected version of the JM-1P is available with
rain hood kits that safeguard the loudspeaker’s electronics
from the elements in fixed, outdoor installations. The rain
hood is available in both vertical (PN 40.185.038.01) and
horizontal (PN 40.185.084.02) versions. The rain hood kits
are comprised of an upper rain hood that protects the heat
sink, and a lower rain hood that protects the user panel and
connectors. The rain hoods are made of a durable, high-
impact polycarbonate that is also transparent, allowing the
loudspeaker's connections and LEDs to be visible.
4.73
[120 mm]
4.79
[122 mm]
6.08
[154 mm]
12.49
[317 mm]
VERTICAL RAIN HOOD KIT CONTENTS
The JM-1P vertical rain hood is used when the loudspeaker
is oriented vertically. The JM-1P vertical rain hood kit
(PN 40.185.038.01) includes the following parts:
2.76
[70 mm]
JM-1P Vertical Rain Hood Kit
Part
Part Number
45.185.084.02
45.185.084.01
45.152.031.01
101.827
Quant.
Upper rain hood assembly
Upper rain hood frame
Lower rain hood assembly
Flat head screws, 8-32 x .25"
Pan head screws, 8-32 x .50"
Lock pins, 5/16” x .63"
1
1
1
4
2
2
Vertical Rain Hood Dimensions: Upper Rain Hood Assembly (Right)
101.008
Installing the Vertical Rain Hood
To install the JM-1P vertical rain hood:
134.024
1. Attach any required cables to the loudspeaker and orient
it vertically.
4.68
[119 mm]
2. Remove the bottom two pan head screws from the
amplifier face.
4.22
[107 mm]
6.25
[159 mm]
6.22
[158 mm]
5.57
[141 mm]
2.50
[64 mm]
Vertical Rain Hood Dimensions: Lower Rain Hood Assembly
35
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APPENDIX B: OPTIONAL RAIN HOODS
3. Secure the upper rain hood frame to the amplifier face
with the four 8-32 x .25 flat head screws, two at the top
and two at the bottom.
HORIZONTAL RAIN HOOD KIT CONTENTS
The JM-1P horizontal rain hood is used when the loud-
speaker is oriented horizontally. The JM-1P horizontal rain
hood kit (PN 40.185.084.02) includes the following parts:
Upper rain
hood frame
JM-1P Horizontal Rain Hood Kit
Part
Part Number
45.185.089.02
45.185.084.01
45.185.090.01
101.827
Quant.
8-32 pan head
screws (4)
Upper rain hood assembly
Upper rain hood frame
Lower rain hood assembly
Flat head screws, 8-32 x .25"
Pan head screws, 8-32 x .50"
Lock pins, 5/16” x .63"
1
1
1
4
2
2
Upper rain
hood assembly
101.008
134.024
8-32 flat head
screws (2)
5.13
[130 mm]
Lock
pins (2)
Lower rain
hood assembly
4.22
[107 mm]
6.25
[159 mm]
Figure 4: JM-1P Vertical Rain Hood Installation
2.50
[64 mm]
6.06
[154 mm]
4. Attach the upper rain hood assembly to the upper rain
hood frame, slipping it under the frame's top flange and
securing it to the bottom of the frame with the two
8-32 x .50 pan head screws.
5.57
[141 mm]
Horizontal Rain Hood Dimensions: Lower Rain Hood Assembly
5. Attach the lower rain hood assembly to the user panel,
slipping it under the flange at the top of the user panel
and securing it to the bottom of the panel with the two
lock pins.
10.91
[277 mm]
NOTE: The vertical rain hood should only be
used when the loudspeaker is oriented verti-
4.79
[122 mm]
12.49
[317 mm]
NOTE: For permanent, fixed outdoor installa-
tions, both the lower and upper rain hood
assemblies should be installed. For touring applica-
tions, the upper rain hood assembly can be removed,
since the heat sinks and fan and can be safely
exposed to occasional rain. However, for all outdoor
applications, the lower rain hood assembly should
always be installed to shield the unit’s connectors
from rain.
6.08
[154 mm]
7.86
[200 mm]
Horizontal Rain Hood Dimensions: Upper Rain Hood Assembly
36
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JM-1P OPERATING INSTRUCTIONS
5. Attach the lower rain hood assembly to the user panel,
slipping it under the flange at the top of the user panel
and securing it to the bottom of the panel with the two
lock pins.
Installing the Horizontal Rain Hood
To install the JM-1P horizontal rain hood:
1. Attach any required cables to the loudspeaker and orient
it horizontally.
NOTE: The horizontal rain hood should only be
used when the loudspeaker is oriented hori-
2. Remove the bottom two pan head screws from the
amplifier face.
NOTE: For permanent, fixed outdoor installa-
tions, both the lower and upper rain hood
assemblies should be installed. For touring applica-
tions, the upper rain hood assembly can be removed,
since the heat sinks and fan and can be safely
exposed to occasional rain. However, for all outdoor
applications, the lower rain hood assembly should
always be installed to shield the unit’s connectors
from rain.
3. Secure the upper rain hood frame to the amplifier face
with the four 8-32 x .25 flat head screws, two at the top
and two at the bottom.
8-32 flat head
screws (4)
Upper rain
hood frame
Lower rain
Upper rain
hood
assembly
hood
assembly
Lock
pins (2)
8-32 pan head
screws (2)
Figure 5: JM-1P Horizontal Rain Hood Installation
4. Attach the upper rain hood assembly to the upper rain
hood frame, slipping it under the frame's top flange and
securing it to the bottom of the frame with the two
8-32 x .50 pan head screws.
37
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APPENDIX B: OPTIONAL RAIN HOODS
38
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APPENDIX C: JM-1P SPECIFICATIONS
ACOUSTICAL
Operating Frequency
Range
53 Hz – 18 kHz
Note: Recommended maximum operating frequency range. Response depends on load-
ing conditions and room acoustics.
Frequency Response
56 Hz – 16.5 kHz 4 dB
Note: Measured free field with 1/3 octave frequency resolution at 4 meters.
Phase Response
580 Hz to 16 kHz 45°
Maximum Peak SPL
138 dB
Note: Measured with music referred to 1 meter.
Dynamic Range
Coverage
>110 dB
20° x 60°
Crossover
520 Hz
Note: At this frequency, the transducers produce equal sound pressure levels.
TRANSDUCERS
Low Frequency
One 15” cone driver with neodymium magnet
Nominal impedance: 2 Ω
Voice coil size: 4”
Power-handling capability: 1200 W (AES)
Note: Power handling measured using AES standards: transducer driven continuously
for two hours with a band limited noise signal having a 6 dB peak-average ratio.
High Frequency
One 4” compression driver
Nominal impedance: 8 Ω
Voice coil size: 4”
Diaphragm size: 4”
Exit size: 1.5”
Power-handling capability: 250 W (AES)
Note: Power handling measured using AES standards: transducer driven continuously
for two hours with a band limited noise signal having a 6 dB peak-average ratio.
AUDIO INPUT
Type
Differential, electronically balanced
Maximum Common
Mode Range
15 V DC, clamped to earth for voltage transient protection
Connectors
Female XLR input with male XLR loop output or VEAM all-in-one (integrates AC power,
audio, and network)
Input Impedance
Wiring
10 kΩ differential between pins 2 and 3
Pin 1: Chassis/earth through 220 kΩ, 1000 pF, 15 V clamp network to provide virtual
ground lift at audio frequencies
Pin 2: Signal +
Pin 3: Signal –
Case: Earth ground and chassis
DC Blocking
CMRR
Differential DC blocking up to maximum common mode voltage
>50 dB, typically 80 dB (50 Hz – 500 Hz)
RF Filter
Common mode: 425 kHz
Differential mode: 142 kHz
TIM Filter
<80 kHz, integral to signal processing
39
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APPENDIX C: JM-1P SPECIFICATIONS
Nominal Input Sensi-
tivity
0 dBV (1 V rms, 1.4 V peak) continuous average is typically the onset of limiting for noise
and music
Input Level
Audio source must be capable of producing +20 dBV (10 V rms, 14 V peak) into 600 Ω to
produce maximum peak SPL over the operating bandwidth of the loudspeaker
AMPLIFIER
Type
Two-channel complementary MOSFET output stages (class AB/H)
Output Power
1275 W total (1 x 1000 W, 1 x 275 W)
Note: Wattage rating is based on the maximum unclipped burst sine-wave rms
voltage the amplifier will produce into the nominal load impedance.
Total Output
2550 W peak
Note: Peak power based on the maximum unclipped peak voltage that the amplifier will
produce for at least 100 milliseconds into the nominal load impedance.
THD, IM TIM
Load Capacity
Cooling
<.02%
2 Ω low channel, 8 Ω high channel
Convection at low to mid audio levels; fan-assisted only at high audio levels
Note: The fan is controlled by audio level, remaining off at turn-on and at low to mid
audio levels and operating only at high audio levels, making it virtually inaudible.
AC POWER
Connectors
PowerCon with loop output or VEAM all-in-one (integrates AC power, audio, and net-
work)
Voltage Selection
Automatic, two ranges, each with high-low voltage tap (uninterrupted)
95–125 V AC; 208–235 V AC; 50/60 Hz
Safety Agency Rated
Operating Voltage
Turn On/Turn Off
Points
85–134 V AC; 165–264 V AC
Note: No automatic turn-off voltages. Voltages above 265 V AC are fuse protected but may cause permanent
damage to the power supply. Voltages below 90 V AC may result in intermittent operation.
Current Draw
Idle Current
0.50 A rms (115 V AC); 0.28 A rms (230 V AC); 0.56 A rms (100 V AC)
4.55 A rms (115 V AC); 2.50 A rms (230 V AC); 5.25 A rms (100 V AC)
Maximum Long-Term
Continuous Current
Burst Current
8.0 A rms (115 V AC); 4.1 A rms (230 V AC); 9.2 A rms (100 V AC)
Note: AC power cabling must be of sufficient gauge so that under burst current rms con-
ditions, cable transmission losses do not drop voltage below specified operating range at
the speaker.
Ultimate Short-Term
Peak Current
20.8 A peak (115 V AC); 13.0 A peak (230 V AC); 21.6 A peak (100 V AC)
Inrush Current
7.1 A peak (115 V AC); 8.4 A peak (230 V AC); 7.1 A peak (100 V AC)
Note: Current draw for a single loudspeaker. Loop output not used.
PHYSICAL
Enclosure
Finish
Multi-ply hardwood
Black textured
Protective Grille
Rigging
Hex-stamped steel with black mesh screen
Aluminum end plates with side links for arraying units; threaded metric M10 points for
rigging accessories; optional pickup plate and vertical grid for suspending arrays with
uptilt or downtilt
Dimensions
16.79" w x 36.08" h x 29.30" d (427 mm x 916 mm x 744 mm)
40
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JM-1P OPERATING INSTRUCTIONS
Weight
Weight 147 lbs (66.68 kg)
ENVIRONMENTAL
Operating Temperature 0° C to +45° C
Non Operating Tem-
perature
<–40° C or >+75° C
Humidity
To 95% at 35° C
Operating Altitude
To 4600 m (15,000 ft)
Non operating Altitude To 95% at 35° C
Shock
30 g 11 msec half-sine on each of 6 sides
10 Hz – 55 Hz (0.010 m peak-to-peak excursion)
Vibration
JM-1P COMPLIANCE
C
US
JM-1P DIMENSIONS
7.32
[186 mm]
28.00
[711 mm]
29.30
[744 mm]
20°
18.04
[458 mm]
36.08
[916 mm]
16.79
[427 mm]
13.04
[331 mm]
JM-1P Dimensions
41
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APPENDIX C: JM-1P SPECIFICATIONS
42
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Meyer Sound Laboratories Inc.
2832 San Pablo Avenue
Berkeley, CA 94702
© 2009
Meyer Sound Laboratories Inc.
05.202.005.01 A
T: +1 510 486.1166
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