Meyer Sound Home Theater Screen UM 1 User Manual

Features  
High gain-before-feedback  
Ultra-low distortion  
Ultra-flat frequency response  
Rugged and reliable  
UM-1C  
UltraMonitor™  
Applications  
Stage Monitoring  
Clubs and concerts  
Low-throw coverage  
Fill coverage  
— 12  
— 9  
— 6  
— 3  
— 0  
Inches  
The UltraMonitor delivers the final  
The sturdy, multi-ply hardwood enclo-  
word on high-powered, critical monitoring. sure with textured finish withstands road  
Specifically designed for touring reinforce-  
ment, the highly accurate, rugged UM-1C  
biamplified system consists of a proprietary  
12-inch low-frequency driver in a vented  
enclosure, and a symmetrical pattern 45-  
degree high-frequency horn with driver.  
The UM-1C proprietary drivers provide  
exceptional efficiency and power handling,  
with ultra-low distortion for high clarity.  
Very flat frequency response allows control  
of feedback at high sound levels.  
abuse. The unit comes with handles and,  
optionally, aircraft-style rigging pan fittings.  
The UltraMonitor requires a high-  
quality professional stereo power amplifier  
capable of delivering up to 250 watts per  
channel continuously into 8 ohms, with a  
signal voltage gain of 20dB (minimum)  
to 30dB (maximum).  
Meyer Sound Laboratories, Inc.  
2832 San Pablo Avenue  
Berkeley, CA 94702  
(510) 486-1166  
FAX (510) 486-8356  
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The M-1A Control  
Electronics Unit  
6
5
8
VHF  
Hi  
4
+
-
3
2
10  
20  
Safe  
Var  
Cal  
Lo Cut  
VHF  
1
Safe  
Power  
Lo  
0
Adj  
UltraSeries™ M-1A  
Sense Limit  
Attn dB  
The UM-1C UltraMonitor operates as a  
system with the M-1A Control Electron-  
ics Unit (one per channel). Optimized for  
the UM-1C and UPA-1C loudspeakers  
and pre-aligned at the factory, the M-1A  
contains frequency response and phase  
response alignment circuitry, and Meyer  
Sounds exclusive SpeakerSensedriver  
protection circuitry, incorporating both  
peak and RMS signal limiting.  
To enhance the effectiveness of the  
UltraMonitor in stage monitoring applica-  
tions, the M-1A incorporates sliding filters  
which band-limit the system response  
under full-power conditions. This has the  
effect of discriminating for vocal informa-  
tion in the signal to increase clarity, and  
is particularly useful when onstage levels  
are high and leakage becomes a problem.  
For this reason, it is recommended that  
subwoofers be used with the system if it  
A single-channel device operating  
at line level, the M-1A is the final com-  
ponent in the signal chain before the  
amplifier.  
must pass the full audio frequency range at  
all times (as, for example, in keyboard  
or drum monitors). The preferred choice  
of subwoofer for the UltraMonitor is the  
SpeakerSense driver protection  
circuitry protects the UM-1C loudspeaker Meyer Sound USW-1.  
components from damage due to over-  
heating under high power conditions.  
This unique circuit continuously moni-  
tors the power applied to the UM-1C  
drivers, and individually limits the high-  
frequency and low-frequency outputs  
when the safe operating limits of the  
drivers are exceeded. Until the onset of  
overload, the SpeakerSense circuitry  
has no effect on the signal.  
Also provided is a switch-selectable  
Safeguard function, which widens the  
safety margin of the system and is in-  
tended to be used when extended periods  
of overload are anticipated. The Safe-  
guard switch and other setup controls  
are located behind a cover plate on the  
M-1A front panel, providing a means of  
securing the system installers presets.  
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Meyer Sound Laboratories has  
devoted itself to designing,  
Architectural and  
Engineering Specifications UM-1C/M-1A  
manufacturing and refining  
components that deliver superb  
sonic reproduction. Every part of  
every component is designed and  
built to exacting specifications and  
undergoes rigorous, comprehensive  
testing in the laboratories.  
The compact speaker system shall be  
of the two-way type, with a 12" low-  
frequency loudspeaker front-mounted in  
a ducted bass-reflex hardwood plywood  
enclosure, a compression driver  
mounted on a high-frequency horn  
which has a 1.4" throat, and a separate  
Control Electronics Unit.  
The speaker system, its companion  
Control Electronics Unit, and a power  
amplifier rated at 250 watts/channel into  
8 ohms shall meet the following perform-  
ance criteria: frequency response, 70 Hz to  
18 kHz plus or minus 4 dB measured with  
1/3 octave pink noise at 1 meter on axis;  
output of 125 dB SPL one meter on axis  
with peaks of 135dB SPL when driven with  
A-weighted noise. Total mid-band har-  
monic distortion shall be less than 1% at  
110 dB SPL and 3% at 120 dB SPL one  
meter on axis. High frequency distribution  
pattern, 45 degrees symmetrical.  
Research remains an integral,  
driving force behind all production.  
Meyer strives for sound quality that  
is predictable and neutral over an  
extended lifetime and across an  
extended range.  
The Control Electronics Unit shall  
contain a power supply capable of  
operat-ing from a 120/240V AC, 50/60  
Hz line, electronic crossover circuitry,  
electronic delay for the phase alignment  
of the low-frequency speaker, low- and  
high-frequency protection filters which  
automatically activate under high power  
conditions, RMS limiters which protect  
the speakers from overheating, equaliza-  
Speaker enclosure dimensions are  
14" W x 14" H x 2212" D, weight 67 lbs  
(30.4 kg).  
Control Electronics Unit dimensions are  
tion circuitry, active balanced input, and 19" W x 134" H 734" D, weight 8 lbs (3.6 kg).  
indicator LEDs for power and limiters.  
Total harmonic distortion shall be less  
than .1%. “A- weighted noise level shall  
be at least 110dB below maximum rated  
output of +26 dBu.  
The speaker system shall be the Meyer  
Sound UM-1C.  
The Control Electronics Unit shall be  
the Meyer Sound M-1A.  
Physical Dimensions  
1"  
7.5"  
14.0"  
7.5"  
2"  
7.0"  
13.0"  
15.0"  
2.2"  
2.13"  
Connector  
(Recessed)  
Sound  
11.0"  
engineering  
for the art  
and science  
of sound.  
22.38"  
3.18"  
6.0"  
14.44"  
18.5"  
Meyer Sound Laboratories, Inc.  
2832 San Pablo Avenue  
Berkeley, CA 94702  
52o  
2.63"  
4.13"  
(
510) 486-1166  
FAX (510) 486-8356  
©1993 Meyer Sound  
04051071.03A  
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