American Audio Music Mixer M1624FX User Manual

M1624FX  
User Guide  
and Reference Manual  
6122 S. Eastern Ave  
Los Angeles, CA 90040  
6/08  
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M1624FX  
ELECTRiCaL SaFETY PRECaUTiONS  
The serial and model number for this unit is  
located on the rear panel. Please write down  
the numbers here and retain for future refer-  
ence.  
WARNINg: TO PREVENT FIRE OR ELECTRIC  
SHOCk HAZARD, DO NOT EXPOSE THIS  
UNIT TO RAIN, LIqUIDS, OR MOISTURE  
Model No._____________________________  
Serial No._____________________________  
CAUTION: TO PREVENT ELECTRIC SHOCk  
DO NOT USE THIS (POLARIZED) PLUg  
WITH AN EXTENSION CORD, RECEPTACLE,  
OR OTHER TYPE OF ELECTRICAL OUTLET  
UNLESS THE WIDE bLADES CAN bE  
CAREFULLY INSERTED INTO A MATCHINg  
WIDE SLOT.  
Purchase Notes:  
Date of Purchase_______________________  
Dealer Name__________________________  
Dealer Address_________________________  
ATTENTION: POUR PREVENIR LES CHOCS  
ELECTRIqUES NE PAS UTILISER CETTE  
FICHE POLARISEE AVEC UN PROLON-  
gATEUR, UNE PRISE DE COURANT OU  
UNE AUTRE SORTIE DE COURANT, SAUF  
SI LES LAMES PEUVENT ETRE INSEREES A  
FOND SANS EN LAISSER AUCUNE PARTIE A  
DECOUVERT.  
_____________________________________  
_____________________________________  
Dealer Phone__________________________  
NOTE: This product satisfies FCC  
regulations when shielded cables  
and connectors are used to con-  
nect the unit to other equipment.  
To prevent electromagnetic inter-  
ference with electrical appliances  
such as radios and televisions, use  
shielded cables and connectors  
for connections.  
©American Audio®  
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M1624FX  
ELECTRiCaL SaFETY PRECaUTiONS  
ELECTRICAL PRECAUTIONS  
CAUTION  
RISK OF ELECTRIC SHOCK  
DO NOT OPEN  
The lightning flash with arrowhead symbol, within an  
equilateral triangle, is intended to alert the user to the  
presence of uninsulated "dangerous voltage" within the  
product'senclosurethatmaybeofsufficientmagnitude  
to constitute a risk of electric shock to persons.  
The exclamation point within an equilateral triangle is  
intended to alert the user to the presence of important  
operating and maintenance (servicing) instructions in  
the literature accompanying the appliance.  
CAUTION: TO REDUCE THE RISK OF ELECTRIC  
SHOCK, DO NOT REMOVE THE COVER (OR BACK).  
THERE ARE NO USER SERVICEABLE PARTS  
INSIDE REFER SERVICE TO YOUR AUTHORIZED  
AMERICAN AUDIO® SERVICE TECHNICIAN.  
IMPORTANT SAFETY INSTRUCTIONS  
OBJECT aNd LiQUid ENTRY - Never push objects of  
REad iNSTRUCTiONS — All the safety and operating  
GROUNdiNG OR POLaRiZaTiON  
instructions should be read before the product is  
operated.  
Ifthisproductisequippedwithapolarizedalternating  
current line plug (a plug having one blade wider than  
theother), itwillfitintotheoutlet onlyoneway. This  
isasafetyfeature.Ifyouareunabletoinserttheplug  
fullyintotheoutlet, tryreversingtheplug. Iftheplug  
should still fail to fit, contact your electrician to  
replace your obsolete outlet. Do not defeat the  
safety purpose of the polarized plug.  
any kind into this product through openings as they  
may touch dangerous voltage points or short-out  
parts that could result in a fire or electric shock.  
Never spill liquid of any kind on the product.  
RETaiN iNSTRUCTiONS — The safety and operating  
instructionsshouldberetainedforfuturereference.  
HEEd WaRNiNGS — All warnings on the product and  
in the operating instructions should be adhered to.  
FOLLOW iNSTRUCTiONS — All operating and use  
instructions should be followed.  
SERviCiNG — Do not attempt to service this product  
yourself as opening or removing covers may expose  
you to dangerous voltage or other hazards. Refer all  
servicing to qualified service personnel.  
CLEaNiNG — The product should be cleaned only with  
a polishing cloth or a soft dry cloth. Never clean with  
furniture wax, benzine, insecticides or other volatile  
liquids since they may corrode the cabinet.  
If this product is equipped with  
a
three-wire  
daMaGEREQUiRiNGSERviCE - Unplugthisproduct  
from the wall outlet and refer servicing to qualified  
service personnel under the following conditions:  
groundingtypeplug,aplughavingathird(grounding)  
pin, itwillonlyfitintoagroundingtypepoweroutlet.  
Thisisasafetyfeature.Ifyouareunabletoinsertthe  
plug into the outlet, contact your electrician to  
replace your obsolete outlet. Do not defeat the  
safety purpose of the grounding type plug.  
When the power-supply cord or plug is damaged.  
If liquid has been spilled, or objects have fallen into  
the product.  
aTTaCHMENTS  
Do not use attachments not  
recommendedbytheproductmanufacturerasthey  
may cause hazards.  
If the product has been exposed to rain or water.  
Iftheproductdoesnotoperatenormallybyfollowing  
theoperatinginstructions.Adjustonlythosecontrols  
that are covered by the operating instructions as an  
improper adjustment of other controls may result in  
damage and will often require extensive work by a  
qualified technician to restore the product to its  
normal operation.  
WaTER aNd MOiSTURE — Do not use this product  
near water — for example, near a bathtub, wash  
bowl,kitchensink,orlaundrytub;inawetbasement;  
or near a swimming pool; and the like.  
aCCESSORiES — Do not place this product on an  
unstable cart, stand, tripod, bracket, or table. The  
product may fall, causing serious injury to a child or  
adult, and serious damage to the product. Use only  
POWER-CORd PROTECTiON - Power-supply cords  
should be routed so that they are not likely to be  
walked on or pinched by items placed upon or  
against them, paying particular attention to cords at  
plugs,conveniencereceptacles,andthepointwhere  
they exit from the product.  
OUTdOOR aNTENNa GROUNdiNG — If an outside  
antennaorcablesystemisconnectedtotheproduct,  
be sure the antenna or cable system is grounded so  
astoprovidesomeprotectionagainstvoltagesurges  
andbuilt-upstaticcharges.Article810oftheNational  
ElectricalCode,ANSI/NFPA70,providesinformation  
with regard to proper grounding of the mast and  
supporting structure, grounding of the lead-in wire  
to an antenna discharge unit, size of grounding  
conductors, location of antenna-discharge unit,  
connection to grounding electrodes, and  
requirementsforthegroundingelectrode.SeeFigure  
A.  
LiGHTNiNG — For added protection for this product  
duringalightningstorm,orwhenitisleftunattended  
and unused for long periods of time, unplug it from  
the wall outlet and disconnect the antenna or cable  
system. This will prevent damage to the product  
due to lightning and power-line surges.  
POWER LiNES An outside antenna system should  
notbelocatedinthevicinityofoverheadpowerlines  
or other electric light or power circuits, or where it  
can fall into such power lines or circuits. When  
installing an outside antenna system, extreme care  
should be taken to keep from touching such power  
lines or circuits as contact with them might be fatal.  
OvERLOadiNG — Do not overload wall outlets,  
extensioncords,orintegralconveniencereceptacles  
as this can result in a risk of fire or electric shock.  
If the product has been dropped or damaged in any  
way.  
When the product exhibits a distinct change in  
with  
a
cart, stand, tripod, bracket, or table  
recommended by the manufacturer, or sold with  
the product. Any mounting of the product should  
follow the manufacturer’s instructions, and should  
use a mounting accessory recommended by the  
manufacturer.  
performance — this indicates a need for service.  
REPLaCEMENT PaRTS -- When replacement parts  
arerequired,besuretheservicetechnicianhasused  
replacement parts specified by the manufacturer or  
have the same characteristics as the original part.  
Unauthorizedsubstitutionsmayresultinfire,electric  
shock, or other hazards.  
SaFETY CHECk - Upon completion of any service or  
repairs to this product, ask the service technician to  
performsafetycheckstodeterminethattheproduct  
is in proper operating condition.  
CaRT — A product and cart combination should be  
moved with care. Quick stops, excessive force, and  
uneven surfaces may cause the product and cart  
combination to overturn.  
WaLL OR CEiLiNG MOUNTiNG — The product should  
not be mounted to a wall or ceiling.  
HEaT The product should be situated away from heat  
sources such as radiators, heat registers, stoves, or  
other products (including amplifiers) that produce  
heat.  
vENTiLaTiON — Slots and openings in the cabinet are  
provided for ventilation and to ensure reliable  
operation of the product and to protect it from  
overheating, and these openings must not be  
blocked or covered. The openings should never be  
blocked by placing the product on a bed, sofa, rug,  
or other similar surface. This product should not be  
placed in a built-in installation such as a bookcase or  
rack unless proper ventilation is provided or the  
manufacturer’s instructions have been adhered to.  
POWER SOURCES —This product should be operated  
only from the type of power source indicated on the  
marking label. If you are not sure of the type of  
power supply to your home, consult your product  
dealer or local power company.  
ANTENNA  
LEAD IN  
WIRE  
GROUND  
CLAMP  
ANTENNA  
DISCHARGE UNIT  
(NEC SECTION 810-20)  
LOCaTiON – The appliance should be installed in a  
stable location.  
NONUSE PERiOdS – The power cord of the appliance  
should be unplugged from the outlet when left un-  
used for a long period of time.  
ELECTRIC  
SERVICE  
EQUIPMENT  
GROUNDING CONDUCTORS  
(NEC SECTION 810-21)  
GROUND CLAMPS  
POWER SERVICE GROUNDING  
ELECTRODE SYSTEM  
(NEC ART 250, PART H)  
Fig. A  
NEC — NATIONAL ELECTRICAL CODE  
©American Audio®  
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M1624FX  
SaFETY PRECaUTiONS  
8. Never plug this mixer in to a dimmer pack.  
1. For adult use only - keep out of the reach  
of children.  
9. Do not let insecticides, benzene, or thinner  
come in contact with the surface of the  
unit.  
2. Water and Moisture - The player should not  
be used near water - for example, near a bath  
tub, kitchen sink, laundry tub, in a wet base-  
ment or near a swimming pool, etc. Do not  
spill water or other liquids in to or on to your  
mixer.  
10. This unit is intended for indoor use only, use  
of this product outdoors voids all warranties.  
11. Always mount this unit in safe and stable  
matter.  
3. Ventilation - The Mixer should be situated  
so that its location or position does not inter-  
fere with its proper ventilation. For example,  
the Mixer should not be situated on a bed,  
sofa, rug, or similar surface that may block the  
ventilation openings; or, placed in a built-in  
installation, such as a bookcase or cabinet that  
may impede the flow of air through the ventila-  
tion openings.  
12. Disconnect from main power before making  
any type of connection.  
13. Cleaning - The mixer should be cleaned  
only as recommended by the manufacturer.  
Use a soft cloth to wipe down the outside of the  
unit. For stubborn stains moisten a soft cloth  
with glass cleaner or other mild detergent to  
wipe away any stains. Use a soft cloth to wipe  
any residual cleaner. Never use volatile clean-  
ers such as benzene, solvent, or thinner to clean  
your unit, these cleaners will damage the units  
surface.  
4. Heat - The Mixer should be situated away  
from heat sources such as radiators, heat reg-  
isters, stoves, or other appliances (including  
amplifiers) that produce heat.  
14. Handle the power supply cord carefully. Do  
not damage or deform; it may cause electric  
shock or malfunction when used. Hold plug  
attachment when removing from wall outlet.  
Do not pull on the cord.  
5. Power Sources - The Mixer should be con-  
nected to a power supply (wall outlet) only of  
the type described in the operating instructions  
or as marked on the Mixer.  
6. Servicing -The user should not attempt to  
service the Mixer beyond that described in the  
operating instructions. There are no user ser-  
viceable parts inside. All other servicing should  
be referred to qualified service personnel. The  
Player should be serviced by qualified service  
personnel when:  
15. To avoid electric shock, do not open the  
top cover when the unit is plugged in. If prob-  
lems occur with the unit, call American Audio®  
customer support.  
16. Do not place metal objects or spill any liq-  
uids inside or on the mixer. Electric shock or  
malfunction may occur.  
A. The power-supply cord or the plug has  
been damaged.  
b. Objects have fallen, or liquid has been  
spilled into the Mixer.  
C. The Mixer has been exposed to rain  
or water.  
D. The Mixer does not appear to operate  
normally or exhibits a marked change  
in performance.  
17. Power Cord Protection - Power supply  
cords should be routed so that they are not  
likely to be walked on or pinched by items  
placed upon or against them, paying particular  
attention to cords at plugs, convenience recep-  
tacles, and the point where they exit from the  
mixer. Route your power cord out of the way of  
foot traffic.  
7. Never disassemble or modify your unit in  
any way, doing so will void your manufactures  
warranty.  
18. Always have the trim controls set to their  
lowest level during initial power-up to prevent  
speaker damage.  
©American Audio®  
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M1624FX  
iNTROdUCTiON  
Introductions: Congratulations and thank you for purchasing the American Audio® M1624FX mixing  
console. This mixing console is a representation of American Audio’s continuing commitment to pro-  
duce the best and highest quality audio products possible at an affordable price. Please read and  
understand this manual completely before attempting to operate your new mixer. Please carefully read  
and understand the instructions in this manual thoroughly before attempting to operate this unit. These  
instructions contain important safety information regarding the use and maintenance of this unit. Take  
special care to follow all warning symbols and labels both on the unit and printed in this manual. Also,  
Please keep this manual with the unit, for future reference.  
Customer Support:  
American Audio® provides a toll free customer support line, to provide set up help and answer any  
question should you encounter problems during your initial set up or operation. You may also visit us  
through Friday 9:00 a.m. to 5:30 p.m. Pacific Standard Time.  
Voice:  
Fax:  
(800) 322-6337  
(323) 582-2941  
E-mail:  
Caution! There are no user serviceable parts inside this mixer. Do not attempt any repairs yourself,  
without being instructed to do so by an authorized American Audio service technician. Doing so will  
void your manufactures warranty. In the unlikely event your mixer may require service, please contact  
American Audio® customer support.  
Do not discard the packing carton in the trash. Please recycle when ever possible.  
M1624FX  
SET-UP PRECaUTiONS  
Please be sure to make any connections before plugging the mixer in to an electrical outlet. All fader  
and volume controls should be set to zero or minimum position, before the mixer is switched on. If the  
mixer has been exposed to drastic temperature fluctuation (e.g. after transportation), do not switch on  
the mixer immediately. The arising condensation of water might damage your device. Leave the device  
switched off until it has reached room temperature.  
Operating Determinations:  
• When installing this mixer, please make sure that the device is not exposed or will not be  
exposed to extreme heat, moisture or dust!  
• Do not operate the mixer in extremely hot (more than 30°/100°F) or extremely cold (less than  
5°C/40°F) surroundings.  
• keep the unit out of direct sunlight and away from heaters.  
• Operate the mixer only after becoming familiar with its functions. Do not permit operation by  
persons not qualified for operating the mixer. Most damages are the result of unprofessional  
operation!  
• Do not attempt to operate this mixer if the power cord has been frayed or damaged.  
• Disconnect from main power before making any type of connection.  
• Do not attempt to operate this mixer, if it becomes damaged in any way.  
• Never operate this mixer when it’s covers are removed.  
To reduce the risk of electrical shock or fire, do not expose this mixer to rain or moisture.  
• This mixer is intended for indoor use only, use of this product outdoors voids all warranties.  
• During long periods of non-use, disconnect the mixer’s main power.  
©American Audio®  
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M1624FX  
UNPaCkiNG  
Every M1624FX has been thoroughly tested and has been shipped in perfect operating condition.  
Carefully check the shipping carton for damage that may have occurred during shipping. If the carton  
appears to be damaged, carefully inspect your mixer for any damage and be sure all equipment neces-  
sary to operate the mixer has arrived intact. In the event damage has been found or parts are missing,  
please contact our toll free customer support number for further instructions. Please do not return the  
mixer to your dealer without first contacting customer support.  
M1624FX  
FRONT & REaR PaNEL  
©American Audio®  
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M1624FX  
CHaNNEL CONTROLS aNd FUNCTiONS  
CHANNEL CONTROL SECTION  
MONO MONO/STEREO STEREO  
COMbO  
1
2
3
4
5
6
7
8
9
10  
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M1624FX  
CHaNNEL CONTROLS aNd FUNCTiONS cont.  
CHANNEL CONTROL SECTION:  
1. PEAK LED INDICATORS & TRIm CONTROL -  
PEAK INDICATORS - These LED indicators will “light” when the input signal reaches 5db below the  
channel’s clipping point. If the LED “lights” more then usual, you should use the TRIM CONTROL to  
decrease the input level of the channel. If this does not work, reduce the output level of the connected  
source.  
TRIm CONTROL - This adjustment is used to adjust the audio source signal input gain for a channel.  
The best S/N and dynamic range balance will be reached if you adjust the TRIM CONTROL so that the  
PEAk INDICATORS “light” occasionally.  
Channel Sensitivity”  
MIC input sensitivity is between +6db and -50db.  
Line input sensitivity is between +14db and -30db.  
The Mono/Stereo Combo input channel sensitivity is between +20db and -20db.  
2. HPF (HIGH PASS FILTER) BUTTON - This button toggles the HPF (Hight Pass Filter) on or off. To  
turn the HPF on press the button in. The HPF cuts frequencies below 75Hz.  
3. EQUALIZER - Please see the chart below for the max. Boost/Cut for each control.  
CHANNELHIGHCONTROL-Thisknobisusedtoadjustthehigh(treble)frequencylevelsofthechannel.  
Turningtheknob inacounter-clockwisedirectionwilldecreasetheamountoftrebleappliedtoachannel  
signal,turningtheknobinaclockwisedirectionwillincreasetheamountoftrebleappliedtoachannelsignal.  
CHANNEL mID CONTROL - This knob is used to adjust the midrange levels of the channel. Turning  
the knob in a counter-clockwise direction will decrease the amount of midrange applied to a channel  
signal, turning the knob in a clockwise direction will increase the amount of midrange applied to a  
channel signal.  
CHANNEL LOw CONTROL - This knob is used to adjust the low frequency levels of the chan-  
nel. Turning the knob in a counter-clockwise direction will decrease the amount of bass applied to a  
channel signal, turning the knob in a clockwise direction will increase the amount of bass applied to a  
channel signal.  
MAX.  
BOOST/CUT  
CONTROL  
FREQUENCY  
TYPE  
HIGH  
MID  
±15dB  
12kHz  
2.5kHz  
80Hz  
Shelving  
Peaking  
Shelving  
±12dB  
LOW  
±15dB  
4. AUX CONTROLS - The AUX knobs control the signal level that the channel sends to AUX bus.  
5. PRE/POST BUTTON - This button determines if the AUX signal is Pre Fader (signal level is not  
affected by fader position) or Post Fader (signnal level is affected by the fader position).  
6. EFX CONTROL - These knobs control the signal levels sent to the EFX bus. The channel signals  
mixed by this bus have their overall level set by the MASTER EFX SEND control to the EFX jack located  
on the front top panel. Since the control is place after the channel fader, the signal level will be  
affected by the channel fader’s setting.  
NOTE: The Effect bus signal is also fed into the internal DSP (digital signal processor).  
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M1624FX  
CHaNNEL CONTROLS aNd FUNCTiONS cont.  
7. PAN/BALANCE CONTROL -  
PAN (mono Control) - This control pans the channel signal across the master L and R buses, there-  
fore determining the ideal position of the sound from that channel.  
EXAmPLE: If the PAN control is set all the way to the left, the sound from that channel will only be  
projected from the left speaker only. Same goes for the control being set all the way to the right, only  
from the right speaker.  
BALANCE (Stereo Control) - This control lets you adjust the balance of the L/R position, of the stereo  
input signal. Turning this knob to the left moves the source signal towards the MAIN MIX L bus, turning  
the knob to the right sends the signal towards the MAIN MIX R bus.  
8. mUTE/ALT 3/4 BUTTON - When the corresponding channels MUTE/ALT 3/4 button is not active  
(depressed) the channel output will be sent to the ALT 3/4 output, and not the MAIN L/R output. The  
ALT 3/4 bus gives you a second independent stereo sub mix with its own sub master stereo fader.  
9. PFL BUTTONS - This button allows you to monitor the PRE FADER LEVEL input signal through  
headphones or the control room outputs. When the button is NOT pressed the channel signal will be  
sent to the PFL bus.  
10. CHANNEL FADERS - Thes faders are channel’s main level control. These fader’s control the  
signal level sent from the channel to the master mixing, group outs, and effect buses. The settings of  
the input channel faders affect the mix or the sound level balance between the instruments or other  
sources connected to the inputs. When a channel is not being used, the fader should be set at the  
minimum position to prevent any unwanted noise added to the main signal.  
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M1624FX  
MaiN CONTROLS aNd FUNCTiONS  
MAIN CONTROL SECTION  
11  
12  
21  
22  
13  
14  
23  
Effects List  
15  
16  
17  
24  
25  
26  
18  
19  
27  
20  
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M1624FX  
MaiN CONTROLS aNd FUNCTiONS cont.  
mAIN CONTROL SECTION:  
11. DSP PROGRAm DISPLAY - This displays shows the number of the selected effect. Please see the  
effect list located on the MAIN CONTROL SECTION of the mixing console.  
12. DSP PROGRAm SELECT KNOB - The program knob wil allow you to select one of the 100 built-in  
digital effects. This control board has a 24 bit digital high quality effect processor.  
13. AUX PRE CONTROL - Use this control to adjust the signal level sent from the internal digital effect  
.
to the AUX bus  
14. STEREO RETURN CONTROL - Use the corresponding control knobs to adjust the signal level of  
the mixed L/R signal sent from the RETURN jack (L & R MONO) to the AUX bus.  
15. mASTER SEND CONTROLS -  
AUX CONTROL kNObS - Use this control knob to adjust the signal level sent to the AUX output  
jack.  
MASTER EFFECT CONTROLS - Use this knob to adjust the signal level of the EFFECT bus sent to the  
EFFECT output jack.  
16. TAPE IN CONTROL - This knob controls the playback signal level from the component that is  
connected to the TAPE IN RCA JACkS located on at the top panel of the mixing board.  
17. DSP ON/OFF BUTTON - This button turns the internal effect program on/off.  
18. PFL BUTTON - Pressing this button “In” will allow you to send the effect signal to the PFL bus.  
19. EFX RTN FADER - With this fader you can adjust the signal level sent from the digital effect to  
the MAIN bus.  
20. ALT 3/4 FADER - With this fader you can adjust the final combined stereo signal level that is sent  
to the ALT 3/4 output jacks.  
21. POwER INDICATOR - This indicator will light when mixer power switch is turned on.  
22. PHANTOm POwER BUTTON - When this button is pressed “In”, the mixer will supply power to  
all channels the provide XLR MIC input jacks. Use this function when using one or more condensor  
microphones.  
Note: when this function is active, the mixer supplies DC +48V power to pins 2 and 3 of all XLR  
type mIC input jacks.  
• Leave this switch off if you do not need phantom power.  
• When you turn this function on, make sure that only condenser MICs are connected to the XLR  
input jacks. Devices other then condensor MICs may be damaged if connected to the phantom  
power supply.  
• The switch may be left on when connecting to balanced dynamic microphones.  
• To avoid damage to speakers, be sure to turn off the amplifier (on powered speakers) before turn-  
ing this function on or off. Also, to avoid loud noises that could cause hearing loss or device dam-  
age, we recommend that you turn all out controls (MAIN, master fader, ALT 3/4 fader etc.) to the  
minimum settings before activating this function.  
23. LEVEL mETER - This LED displays the signal level of the selected LEVEL METER SIgNAL bUTTON.  
When the meter lights up RED then the output is hitting the clipping level.  
24. CONTROL ROOm/HEADPHONE CONTROL - This controls the signal level that is sent to the  
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M1624FX  
MaiN CONTROLS aNd FUNCTiONS cont.  
CONTROL ROOM JACkS or HEADPHONE JACk.  
25. LEVEL-mETER SIGNAL BUTTONS - Use these buttons to select the signal that is sent to the  
CONTROL ROOM outputs and/or HEADPHONE output. The ouput level will be shown in the LEVEL  
METER. Please see the illustration below to see how the button settings correspond to the signal  
selection.  
Switch  
PFL  
TAPE IN ALT3 / 4  
Signal  
ON  
PFL  
ON  
TAPE IN  
ALT3/4  
MAIN  
C-R OUT  
&
PHONES  
ON  
OFF  
OFF  
OFF  
26. TO mAIN BUTTON - When this button is pressed “In” (On), the mixer will send the signal from the  
ALT 3/4 to the MAIN L/R outputs.  
27. mAIN L/R FADERS - This fader adjusts the final signal level sent to the MAIN L/R output.  
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M1624FX  
iNPUT aNd OUTPUT CONNECTiONS  
INPUT AND OUTPUT CONNECTIONS  
28  
29  
30 31  
32  
33  
34  
40  
39  
38 37 36  
35  
INPUT AND OUTPUT CONNECTIONS:  
28. CHANNEL INPUT JACKS -  
mIC JACKS - These are balanced 3-pin XLR-type input jacks.  
BALANCED LINE IN JACKS - These standard 1/4” TRS phone jack are used for balanced or  
unbalanced line level signals. Some examples of line level equipment include most electronic key-  
boards, synthesizers, turntables (with appropriate pre-amps), tape decks and line outputs from  
other mixers.  
29. CHANNEL STEREO INPUT JACKS - These are unbalanced stereo line input jacks. The two  
jacks provided are 1/4” and RCA.  
30. TAPE INPUT JACKS - These RCA jacks are used to connect a stereo sound source. Use these  
jacks when you want to connect a CD, cassette, or DAT, directly to the mixer for monitoring. Use  
the TAPE IN CONTROL to adjust the signal level.  
31. REC OUT JACKS - These jacks send the PRE FADER signal from the master bus to a tape  
deck for recording.  
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M1624FX  
iNPUT aNd OUTPUT CONNECTiONS cont.  
32. FOOT SwITCH JACK - You can connect a foot switch to this jack, and use the foot jack to  
toggle the digital effects on/off.  
33. ALT 3/4 OUPUT JACKS - These unbalanced 1/4” phone type jacks output the ALT 3/4 signal  
to the input of a MTR, external mixer, or other device.  
34. CONTROL ROOm OUTPUT JACKS - These stereo 1/4” phone type output jacks send the  
mixed signal to a monitoring system. Use the CONTROL ROOM/HEADPHONE CONTROL to adjust  
the output signal level. The signal monitored by these jacks is select by the using the LEVEL METER  
SIgNAL bUTTONS.  
35. HEADPHONE JACK - Use this jack to connect headphones to the mixing board.  
NOTE: The signal monitored by these jacks is select by the using the LEVEL METER SIgNAL  
bUTTONS, the TAPE IN CONTROL and the PFL bUTTON on the input channels.  
36. mAIN L/R OUTPUT JACKS - These jacks deliver a stereo output signal to a amplifier or pow-  
ered speakers. You can also use these outputs to send a signal you wish to record. You can control  
the signal level control using the MAIN FADER located in the MASTER CONTROL section.  
37. AUX OUTPUT JACK - This 1/4” output jack send a signal from the AUX bus to a cue box, effec-  
tor, or other monitoring system.  
38. EFX OUTPUT JACK - This unbalanced phone output jack sends a signal to an external effect  
machine.  
39. STEREO RETURN L (mONO) - These are unbalanced 1/4” TRS phone-type line input jacks. The  
signal received by these jacks is sent to the MAIN bus and AUX bus. These jacks are  
typically used to receive a return signal from an external effector (reverb, delay, etc.)  
40. CHANNEL INSERT I/O JACK - These are 1/4” TRS (tip, ring, sleeve) phone jacks that support  
bi-directional operation. These input/output jacks are located between the head-amplifier and the  
high pass filter. These jacks can be used to independently connect these channels to devices such  
as graphic equalizers, compressors, and noise filters.  
NOTE: Connection to an I/O jack requires a special separately-sold insertion cable. Please see the  
illustration below.  
INPUT/OUTPUT (I/O) JACk  
Tip:Output(Send to external device)  
Sleeve:Ground  
Ring:Input(Return from external device)  
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M1624FX  
CONNECTORS  
- Always use good quality twin screened audio cable. Check for instability at the output.  
- Always connect both conductors at both ends, and make sure that the screen is connected only at  
one end.  
- Do not disconnect the mains earth from each piece of equipment. This is needed to provided both  
safety and screen returns to the system star point.  
- Equipment which has balanced inputs and outputs may need to be electrically isolated from the  
equipment rack and/or other equipment, to avoid earth loops.  
It is important to remember that all equipment which is connected to the mains it a potential source  
of hum and interference and may radiate both electrostatic or electromagnetic radiation. In addition,  
the mains will also act as a carrier for many forms of RF interference generated by electric motors,  
air-conditioning units, hyristor light dimmers etc. Unless the earth system is clean, all attempts to  
improve hum noise levels will be ineffective. In extreme cases there will be no alternative but to pro-  
vide a completely separate and independent ‘technical earth’ to replace the incoming ‘noisy earth’.  
However, always consult your local electricity supply authority to ensure that safety regulations are  
not being infringed.  
American Audio products are manufactured and wired to accept wiring practices used throughout  
the world.  
balanced XLR connections are wired as described, please see the diagram shown below:  
Pin #1 Shield  
Pin #2 Positive  
Pine #3 Negative  
balanced 1/4” TRS connections are wired as described, please see the diagram shown below:  
Tip is Positive  
Hot (positive)  
2
Ring is Negative  
Sleeve is Shield  
Hot (positive)  
Cold (negative)  
3
Screen  
1
Cold (negative) Sleeve  
Balanced Input  
Screen  
Return  
Send  
Sleeve  
Ring  
Insert Points  
Tip  
Sleeve Ring  
Tip  
Amp/Line Input  
Headphones  
3 Pole (Stereo) Jack  
Hot (positive)  
Cold (negative)  
Screen  
Sleeve Ring  
Tip  
Left Signal  
Right Signal  
Ground  
Seeve  
Tip  
Unbalanced  
Input/Output  
AUX Send  
2 Pole (Mono) Jack  
Signal  
Ground  
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M1624FX  
CONNECTORS  
Connector and Cable Configurations  
REMOTE DEVICE  
DESCRIPTION  
REMOTE SIDE OF CABLE  
(Connector Type)  
CABLE  
White(Red)/HIGH  
Black/LOW  
2
1
2
3
3
A. XLR**  
Shield/GND  
(XLR)  
1
Floating or Balanced  
low impedance: most  
professional equipment  
line in and line out,  
microphones.  
White(Red)/HIGH  
Black/LOW  
2
1
T
R
S
3
B.TRS PHONE  
Shield/GND  
(XLR)  
White(Red)/HIGH  
Black/LOW  
2
1
T
S
Unbalanced  
C. STANDARD  
PHONE  
3
Shield/GND  
low impedance: some  
professional equipment  
and microphones.  
(XLR)  
White(Red)/HIGH  
Black/LOW  
2
1
T
S
D. STANDARD  
PHONE  
3
Shield/GND  
Unbalanced  
(XLR)  
high impedance: most  
hi-fi equipment.  
White(Black)/HIGH  
T
S
S
T
E. SHIELD/GND  
PHONE  
Unbalanced  
Shield/GND  
(Standard Phone)  
high impedance: most  
hi-fi equipment.  
Connector and cable configurations are recommended for use with the M 4 bus series. These cables  
are based on the use of auxillary equipment that is isolated from the AC power mains.  
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M1624FX  
HOME STUdiO SET-UP  
SETUP PROCEdURE:  
1. before connecting to microphones and instruments, be sure that all devices are turned off. Also  
be sure that all of the mixer’s channel fader and master control faders are set all the way down.  
2. For each connection, connect one end of the cable to the relevant microphone or instrument and  
connect the other end to the appropriate input jack on the mixer.  
NOTE: Where an input channel provides both a MIC INPUT jack and a LINE INPUT jack, you  
may use either one of these jack but you may not use both at the same time. Please  
connect to only one of these jacks on each channel.  
3. To avoid causing damage to speaker, power up the devices in the following order: Peripheral  
devices mixer power amps (or powered speakers).  
NOTE: When shutting the system down, turn off the power in the opposite order: Power amps  
(powered speakers) mixer Peripheral devices.  
Sound Source(CD,MD,DAT,  
Cassette,Video etc.)  
PROGRAM  
EJECT  
STOP  
PLAY/PAUSE  
LEVEL  
POWER  
REPEAT  
REW  
SKIP  
FWD  
COMPACT DISC PLAYER  
MIN  
MAX  
Master Recorder(MD,DAT.)  
PROGRAM  
EJECT  
STOP  
PLAY/PAUSE  
LEVEL  
POWER  
Synthesizer  
REPEAT  
REW  
SKIP  
FWD  
COMPACT DISC PLAYER  
MIN  
MAX  
MTR  
Foot Switch  
1
2
3
4
5/6  
7/8  
9/10  
11/12  
TAPE IN  
REC OUT  
MIC  
MIC  
MIC  
MIC  
MIC  
MIC  
LINE  
9
LINE 11  
FOOT SWITCH  
ALT 3/4 OUTPUT  
CONTROL ROOM  
LINE 10  
LINE 12  
AUX  
LINE  
LINE  
LINE  
LINE  
LINE  
5
6
LINE  
7
8
LINE  
9
LINE 11  
HEADPHONE  
AUX  
RETURN  
MONO  
MONO  
MONO  
MAIN OUTPUT  
INSERT  
OUT IN  
INSERT  
INSERT  
INSERT  
LINE  
LINE  
LINE 10  
LINE 12  
EFX  
Microphone  
Effector  
Effector  
Rhythm Machine  
Guitar  
Powered Monitor  
Speakers  
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M1624FX  
LivE PERFORMaNCE SET-UP  
Monitor Speakers  
(Internal)  
CD Player  
Guitar  
CD,Cassette,or  
DAT Recorder  
Power Amp  
Microphone  
PRE  
Foot Switch  
1
2
3
4
5/6  
7/8  
9/10  
11/12  
TAPE IN  
REC OUT  
MIC  
MIC  
MIC  
MIC  
MIC  
MIC  
LINE 9  
LINE 11  
FOOT SWITCH  
ALT 3/4 OUTPUT  
CONTROL ROOM  
LINE 10  
LINE 12  
AUX  
LINE  
LINE  
LINE  
LINE  
LINE 5  
LINE 6  
LINE 7  
LINE 8  
LINE 9  
LINE 11  
HEADPHONE  
AUX  
RETURN  
MONO  
MONO  
MONO  
MAIN OUTPUT  
INSERT  
INSERT  
INSERT  
INSERT  
LINE 10  
LINE 12  
EFX  
OUT IN  
Effector  
Effector  
Synthesizer  
Power Amp  
DI  
Stage (Internal)  
Bass  
Main Speakers  
(External)  
AUX  
(PRE  
Audience(External)  
)
ST  
ST  
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M1624FX  
EFFECTS LiST  
Program  
Room  
Size  
Effect Description  
Effect Name  
Efx Level  
No.(Hex)  
00h  
01h  
02h  
03h  
04h  
05h  
06h  
07h  
08h  
09h  
10h  
11h  
12h  
13h  
14h  
15h  
16h  
17h  
18h  
19h  
20h  
21h  
22h  
23h  
24h  
25h  
26h  
27h  
28h  
29h  
30h  
31h  
32h  
33h  
34h  
35h  
36h  
37h  
38h  
39h  
40h  
41h  
42h  
43h  
44h  
45h  
46h  
47h  
48h  
Medium Bright Plate  
Best Plate  
Medium Dark Spring  
Short Plate  
78.00%  
63.00%  
13.00%  
78.00%  
13.00%  
100.00%  
91.00%  
28.00%  
100.00%  
78.00%  
44.00%  
35.00%  
35.00%  
27.00%  
21.00%  
27.00%  
13.00%  
21.00%  
27.00%  
58.00%  
78.00%  
78.00%  
78.00%  
26.00%  
78.00%  
78.00%  
78.00%  
78.00%  
52.00%  
63.00%  
13.00%  
13.00%  
13.00%  
13.00%  
13.00%  
13.00%  
13.00%  
13.00%  
13.00%  
13.00%  
100.00%  
80.00%  
100.00%  
100.00%  
100.00%  
100.00%  
100.00%  
100.00%  
100.00%  
8.00mc  
36.78mc  
9.00mc  
8.00mc  
9.00mc  
8.00mc  
8.00mc  
30.61mc  
12.11mc  
35.75mc  
8.00mc  
9.00mc  
8.00mc  
9.00mc  
8.00mc  
9.00mc  
9.00mc  
9.00mc  
9.00mc  
9.00mc  
8.00mc  
8.00mc  
8.00mc  
45.00mc  
45.00mc  
8.00mc  
8.00mc  
45.00mc  
45.00mc  
36.78mc  
9.00mc  
8.00mc  
8.00mc  
9.00mc  
9.00mc  
9.00mc  
9.00mc  
9.00mc  
9.00mc  
9.00mc  
8.00mc  
8.00mc  
8.00mc  
8.00mc  
8.00mc  
8.00mc  
8.00mc  
8.00mc  
8.00mc  
Long Bright Spring  
Slapback 2  
Slapback w verb  
Echo-Verb echo long verb  
Slow st chor  
Performance  
Hall best hall 2  
Short Hall  
Short Dark Hall  
Short Bright Hall  
Medium Hall  
Medium Dark Hall  
Medium Bright Hall  
Long Hall  
Hall  
Long Dark Hall  
Long Brigh Hall  
Best Hall  
Short Plate  
Short Dark Plate  
Short Bright Plate  
Long Bright Plate  
Medium Dark Plate  
Medium Bright Plate  
Medium Plate  
Plate  
Long Plate  
Long Dark Plate  
Best Plate  
Short Spring  
Short Dark Spring  
Short Bright Spring  
Medium Spring  
Medium Dark Spring  
Medium Bright Spring  
Long Spring  
Long Dark Spring  
Long Bright Spring  
Best Spring  
Spring  
Slapback 2  
Short Echo  
420ms Delay High Feedback  
420ms Delay Low Feedback  
550-275ms Delay cross Feedback  
550ms Delay High Feedback  
550ms Delay Low Feedback  
650-375ms Delay cross Feedback  
650ms Delay High Feedback  
Echo  
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M1624FX  
EFFECTS LiST Cont.  
50h  
Flanger Reverb  
Flanger Short reverb  
It Flanger Medium Reverb  
Medium Flanger Medium Reverb  
Slow Flanger Long Reverb  
Flanger Long Reverb  
Stereo Flanger Medium Reverb  
Stereo Flanger Long Reverb  
Whip Flanger Short Reverb  
Whip Flanger Long Reverb  
Slow Chorus Short Reverb  
Slow Chorus Medium Reverb  
Slow Chorus Long Reverb  
Medium Chorus Medium Reverb  
Medium Chorus Long Reverb  
Fast Chorus Short Reverb  
Fast Chorus Long Reverb  
Trem Chorus Medium Reverb  
Trem Chorus Long Reverb  
Big Chorus Medium Reverb  
Echo-Verb 1  
100.00%  
100.00%  
99.00%  
34.72mc  
34.72mc  
29.58mc  
18.28mc  
29.58mc  
29.58mc  
29.58mc  
29.58mc  
21.36mc  
29.58mc  
30.61mc  
36.78mc  
36.78mc  
29.58mc  
29.58mc  
30.61mc  
29.58mc  
31.64mc  
36.78mc  
29.58mc  
17.25mc  
26.50mc  
40.89mc  
28.56mc  
45.00mc  
29.58mc  
8.00mc  
30.61mc  
30.61mc  
37.81mc  
8.00mc  
11.08mc  
8.00mc  
8.00mc  
8.00mc  
8.00mc  
8.00mc  
8.00mc  
8.00mc  
8.00mc  
41.92mc  
8.00mc  
41.92mc  
41.92mc  
41.92mc  
41.92mc  
41.92mc  
8.00mc  
51h  
52h  
53h  
54h  
55h  
56h  
57h  
58h  
59h  
60h  
61h  
62h  
63h  
64h  
65h  
66h  
67h  
68h  
69h  
70h  
71h  
72h  
73h  
74h  
75h  
76h  
77h  
78h  
79h  
80h  
81h  
82h  
83h  
84h  
85h  
86h  
87h  
88h  
89h  
90h  
91h  
92h  
93h  
94h  
95h  
96h  
97h  
98h  
99h  
100.00%  
100.00%  
100.00%  
100.00%  
100.00%  
100.00%  
100.00%  
100.00%  
100.00%  
100.00%  
79.00%  
Flanger+Verb  
79.00%  
Chorus+Verb  
100.00%  
100.00%  
100.00%  
100.00%  
100.00%  
33.00%  
32.00%  
53.00%  
37.00%  
23.00%  
Hard echo Medium verb  
Echo-Verb 2  
Echo-Verb 4  
Echo-Verb 3  
Pre delay serial  
Cross echo  
Echo long verb  
Echo cross verb  
Echo+Verb  
Echo+Verb  
48.00%  
72.00%  
28.00%  
29.00%  
Echoverb  
Chorus 1  
Chorus 2  
Chorus fast  
18.00%  
100.00%  
100.00%  
100.00%  
100.00%  
72.00%  
Deep slow chorus  
Deep fast chorus  
Medium slow chorus  
Slow stereo chorus  
Leslie  
Chorus  
100.00%  
100.00%  
100.00%  
100.00%  
100.00%  
100.00%  
100.00%  
100.00%  
100.00%  
100.00%  
100.00%  
100.00%  
100.00%  
100.00%  
100.00%  
Medium leslie  
Stereo chorus  
Slow It Flange  
It Flanger  
Deep slow flanger  
Deep It flanger  
Deep lazer flanger  
Jet flanger 1  
Jet flanger 2  
Medium flanger  
Medium lazer flanger  
Strong flanger  
Flanger  
41.92mc  
41.92mc  
©American Audio®  
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M1624FX  
CLEaNiNG  
Dust will settle in the fader track overtime dust can cause a popping noise on the fader. To prevent  
this cover you mixer. If the mixer has been unused for over a month or more move you faders up and  
down a couple of times this will move most of the settle dust from the fader track. Do not eat, drink,  
or smoke over you over or near the mixer.  
Don’t use spray cleaners. Use compressed air or a vacuum with a brush accessory.  
Cleaning frequency depends on the environment in which the mixer operates (i.e. smoke, fog residue,  
dust, dew).  
M1624FX  
TROUBLESHOOTiNG  
Trouble Shooting: Listed below are common problems you may encounter, and solutions.  
I can’t hear the source from a channel thru the main mix  
Check the trim knob, fader, and output volume on your source.  
Check the Mute button, or make sure your sub groups are assigned to the mains.  
Check you connection from the source to the mixer.  
Try the same connection on a different channel with the same settings.  
I hear noise in mix  
Check your power a 60Hz hum, could come from ungrounded equipment.  
Turn all the faders down one at a time and the stereo return knob. If the noise goes away  
it’s that channel or the source. Disconnect the source from the mixer bring up that fader if  
the noise is gone it your source, If it is the source try bringing down its out put volume.  
I have no power  
Make sure your power supply is properly hooked up to the unit.  
I can’t hear the mix on my headphones or my control room monitors  
Check the phones / control room knob, Select the proper source.  
©American Audio®  
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M1624FX  
WaRRaNTY  
The M1624FX carries a one year limited warranty. We recommend you fill out the enclosed warranty  
card to validate your purchase. All returned service items whether under warranty or not, must be freight  
pre-paid and accompany a R.A. (return authorization) number. If the mixer is under warranty, you must  
provide a proof of purchase invoice. You may obtain a R.A. number by contacting our customer support  
team on our toll free number. Please contact American Audio® customer support at (800) 322-6337  
for a R.A. number. All package not displaying a R.A. number on the outside of the package will  
be returned to the shipper.  
1-YEAR LImITED wARRANTY  
A. American Audio® hereby warrants, to the original purchaser, American Audio® products to be free  
of manufacturing defects in material and workmanship for a period of 1 Year (365 days) from the date  
of purchase. This warranty shall be valid only if the product is purchased within the United States of  
America, including possessions and territories. It is the owner’s responsibility to establish the date and  
place of purchase by acceptable evidence, at the time service is sought.  
b. For warranty service, send the product only to the American Audio® factory. All shipping charges  
must be pre-paid. If the requested repairs or service (including parts replacement) are within the terms  
of this warranty, American Audio® will pay return shipping charges only to a designated point within  
the United States. If the entire instrument is sent, it must be shipped in its original package. No acces-  
sories should be shipped with the product. If any accessories are shipped with the product, American  
Audio® shall have no liability whatsoever for loss of or damage to any such accessories, nor for the  
safe return thereof.  
C. This warranty is void if the serial number has been altered or removed; if the product is modified in  
any manner which American Audio® concludes, after inspection, affects the reliability of the product;  
if the product has been repaired or serviced by anyone other than the American Audio® factory unless  
prior written authorization was issued to purchaser by American Audio®; if the product is damaged  
because not properly maintained as set forth in the instruction manual.  
D. This is not a service contract, and this warranty does not include maintenance, cleaning or peri-  
odic check-up. During the period specified above, American Audio® will replace defective parts at  
its expense, and will absorb all expenses for warranty service and repair labor by reason of defects  
in material or workmanship. The sole responsibility of American Audio® under this warranty shall be  
limited to the repair of the product, or replacement thereof, including parts, at the sole discretion of  
American Audio®. All products covered by this warranty were manufactured after January 1, 1990, and  
bear identifying marks to that effect.  
E. American Audio® reserves the right to make changes in design and/or improvements upon its prod-  
ucts without any obligation to include these changes in any products theretofore manufactured.  
F. No warranty, whether expressed or implied, is given or made with respect to any accessory sup-  
plied with products described above. Except to the extent prohibited by applicable law, all implied  
warranties made by American Audio® in connection with this product, including warranties of mer-  
chantability or fitness, are limited in duration to the warranty period set forth above. And no warran-  
ties, whether expressed or implied, including warranties of merchantability or fitness, shall apply to  
this product after said period has expired. The consumer’s and or Dealer’s sole remedy shall be such  
repair or replacement as is expressly provided above; and under no circumstances shall American  
Audio® be liable for any loss or damage, direct or consequential, arising out of the use of, or inability  
to use, this product.  
g. This warranty is the only written warranty applicable to American Audio® Products and supersedes  
all prior warranties and written descriptions of warranty terms and conditions heretofore published.  
©American Audio®  
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M1624FX Instruction Manual Page 23  
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M1624FX  
SPECiFiCaTiONS  
Model: M1624FX  
POwER SUPPLY:  
AC 115v~60Hz/230v~50Hz  
Single Voltage:  
AC 100V, 50/60Hz (Japan);  
AC 110V, 60Hz (Colombia)  
AC 120V, 60Hz (U.S.A. and Canada);  
AC 220V, 50Hz (Chile and Argentina);  
AC 220V, 60Hz (Philippines and korea)  
AC 127V, 60Hz (Mexico)  
AC 240V, 50Hz (Australia)  
AC 230V, 50Hz (Europe, U.k., New Zealand, South Africa, and Singapore)  
DImENSIONS:  
420mm (W) x 436mm (D) x 90mm (H)  
16.5” (W) x 12.9” (D) x 3.54” (H)  
10.1 Lbs. / 4.6 kgs.  
wEIGHT:  
POwER CONSUmPTION:  
36W  
OPERATING TEmPERATURE:  
5 to 35 deg. C; Humidity: 25 to 85% RH  
(non-condensing); Storage Temperature: -20 to 60 deg. C  
mAXImUm OUTPUT LEVEL (0.5% T.H.D. AT 1kHz):  
FREQUENCY RESPONSE:  
+26db (Main L/R), +20db (ALT 3/4, Aux/EFX, & Control Room)  
+20dB (Insert), More than 100mW (Headphones) @ 33Ω  
20Hz ~ 20kHz, +1/-2db (Mix L/R, ALT 3/4, Aux/EFX Send, &  
Control Room)  
T.H.D. (Total Harmonic Distortion):  
<0.1% @ +14db 20Hz ~ 20kHz (Mix L/R, ALT 3/4, Aux/EFX  
Send, & Control Room)  
mAXImUm VOLTAGE GAIN:  
MiC iN to MaiN L/R:  
MiC iN to aLT 3/4:  
MiC iN to aUX (PRE):  
MiC iN to aUX (POST):  
MiC iN to EFX (REv):  
MiC iN to CONTROL ROOM L/R:  
MiC iN to REC L/R:  
74db  
74db  
66db  
76db  
76db  
80db  
52.2db  
54db  
54db  
46db  
56db  
56db  
60db  
44db  
44db  
16db  
20db  
LiNE iN to MaiN L/R:  
LiNE iN to aLT 3/4:  
LiNE iN to aUX (PRE):  
LiNE iN to aUX (POST):  
LiNE iN to EFX (REv):  
LiNE iN to CONTROL ROOM L/R:  
STEREO iN to MaiN L/R:  
STEREO iN to aLT 3/4:  
aUX RETURN iN to MaiN L/R:  
TaPE iN to MaiN L/R:  
HUM AND NOISE [(AVERAGE RS = 150Ω) (Master Fader At Nominal Level & All Channel Faders At Minimum)]:  
MiX L/R, aLT 3/4, aUX/EFX SENd, CONTROL ROOM OUT:  
MiX L/R, aLT 3/4, aUX/EFX SENd, CONTROL ROOM OUT:  
-127db Equivalent Input Noise, -95db Residual Noise  
-88db  
CHANNEL INDICATORS:  
PEak: An indicator for each channel turns on when the pre-channel fader signal is 5db below clipping.  
INTERNAL DIGITAL EFFECT:  
LED mETERS:  
100 Selectable Presets/Foot Switch Controlable  
10-Segment LEDx2, Main L/R, ALT 3/4, PFL, & Tape IN  
©American Audio®  
-
-
M1624FX Instruction Manual Page 24  
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M1624FX  
SPECiFiCaTiONS  
INPUT CHANNEL EQ:  
HiGH:  
Mid:  
LOW:  
12kHz Shelving  
2.5kHz Peeking  
80Hz Shelving  
TURNOvER/ROLL OFF FREQUENCiES:  
Located 3db below Maximum boost/Cut  
GAIN CONTROL (mONO/STEREO COmBINATION INPUT CHANNEL):  
40db Variable (-20db ~ +20db)  
GAIN CONTROL (mONO INPUT CHANNEL):  
CROSSTALK (at 1kHz):  
44db Variable (-50db ~ +6db), (-30db ~ +14db)  
-70db between Input Channels,  
-70db between Input/Output Channels  
-INPUT  
Input  
Input Connector  
Nominal  
Impedance  
Rated  
Input Level  
Connector Type  
Impedance  
CH Mic  
4kΩ  
10kΩ  
3kΩ  
50 ~ 600Ω  
600Ω  
-50dB  
-30dB  
-44dB  
-20dB  
0dB  
XLR 3-31 Type Balanced  
Phone Jack (TRS) T = Hot  
R = Cold S = GND  
CH Line  
Stereo Input Mic  
Stereo Input  
600Ω  
XLR 3-31 Type Balanced  
Unbalanced Phone Jack  
5kΩ  
600Ω  
Phone Jack (TRS) T = Out  
R = In S = GND  
Mono Channel Insert Input  
10kΩ  
10kΩ  
600Ω  
Tape In  
600Ω  
-10dBV  
RCA pin Jack  
-OUTPUT  
Output  
Impedance  
Nominal  
Impedance  
Rated Output  
Level  
Output Connector  
MIX Out L/R  
Connector type  
Balanced Phone Jack  
Unbalanced Phone Jack  
Unbalanced Phone Jack  
Unbalanced Phone Jack  
240Ω  
75Ω  
20KΩ  
10KΩ  
10KΩ  
600Ω  
10kΩ  
10kΩ  
+4dB  
+4dB  
+4dB  
+4dB  
0dB  
ALT 3/4  
CTRL Room Out  
Aux Send  
75Ω  
75Ω  
Phone Jack (TRS)T = Out  
R = In S = GND  
Mono Channel Insert Input  
Rec Out  
600Ω  
600Ω  
-10dBV  
RCA pin Jack  
Phones Out  
100Ω  
33Ω  
3mW  
Stereo Phone Jack  
©American Audio®  
-
-
M1624FX Instruction Manual Page 25  
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©American Audio® World Headquarters:  
6122 S. Eastern Ave. Los Angeles, CA 90040 USA  
Tel: 323-582-3322 Fax: 323-582-2941  
American DJ Europe  
Junostraat 2  
6468 EW kerkrade  
Netherlands  
Tel: +31 45 546 85 00 / Fax: +31 45 546 85 99  
Download from Www.Somanuals.com. All Manuals Search And Download.  

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