Crate Amplifiers Music Mixer CSM12 User Manual

User’s Guide  
for the  
CRATE PRO AUDIO  
CSM8/12/16/24  
Console Mixer  
In order to achieve maximum performance from  
your new Crate Pro Audio Mixer we recommend  
that you read this user’s guide prior to its use.  
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CSM8/12/16/24 Console Mixer  
Congratulations.  
You have selected one of the finest pieces of audio reproduction equipment available for use on stage,  
in the home studio, or for “institutional” use: a Crate Pro Audio Stereo Console Mixer. In order to derive  
the most benefit from the mixer, and to fully understand and appreciate its flexibility and versatility, please  
familiarize yourself with the mixer by reading through this User’s Guide prior to its use.  
And Thank You, from  
Table of Contents:  
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . .page 3  
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3  
About This Manual . . . . . . . . . . . . . . . . . . . . . . . . . . .3  
The Input Channels . . . . . . . . . . . . . . . . . . . . . . . . . . .4  
The Master Section . . . . . . . . . . . . . . . . . . . . . . . . . .5,6  
Equalization Diagrams . . . . . . . . . . . . . . . . . . . . . . . . .7  
Differences in Cable Types . . . . . . . . . . . . . . . . . . . . . .7  
Applications  
Connecting External Effects . . . . . . . . . . . . . . . . . .8  
Basic Mono Operation . . . . . . . . . . . . . . . . . . . . .9  
Basic Stereo Operation . . . . . . . . . . . . . . . . . . . .10  
DJ Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11  
House of Worship Installation . . . . . . . . . . . . . . .12  
Separating Vocals and Instruments . . . . . . . . . . . .13  
System Block Diagram . . . . . . . . . . . . . . . . . . . . . . . .14  
Gain Level Diagram . . . . . . . . . . . . . . . . . . . . . . . . . .15  
Technical Specifications . . . . . . . . . . . . . . . . .back cover  
CAUTION  
PRECAUCION  
ATTENTION  
VORSICHT  
RISK OF ELECTRIC SHOCK  
DO NOT OPEN  
RIESGO DE CORRIENTAZO  
NO ABRA  
RISQUE D'ELECTROCUTION  
NE PAS OUVRIR  
ELEKTRISCHE SCHLAGGEFAHR  
NICHT OFFENEN  
CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK,  
DO NOT REMOVE COVER.  
PRECAUCION PARA DISMINUOIR EL RIESGO DE CORRIENTAZO  
NO ABRA LA CUBIERTA  
NO HAY PIEZAS ADENTRO QUE EL USARIO PUEDO REPARAR  
DEJE TODO MANTENIMIENTO A LOS TECHNICOS CALIFICADOS  
ATTENTION: POUR REDUIRE D'ELECTROCUTION NE PAS  
VORSICHT: ZUR MINIMIERUNG ELEKTRISCHER SCHLAGGEFAHR NICHT  
DEN DECKEL ABENHMEN. INTERNE TEILE KONNEN NICHT VOM  
BENUTZER GEWARTET WERDEN. DIE WARTUNG IS QUALIFIZIERTEM  
WARTUNGSPERSONAL ZU UBERLASSEN.  
ENLEVER LE COUVERCLE. AUCUNE PIECE INTERNE N'EST REPRABLE  
NO USER-SERVICEABLE PARTS INSIDE.  
PAR L'UTILISATEUR. POUR TOUTE REPARATION, S'ADRESSER  
TECHNICIEN QUALIFIE.  
A
UN  
REFER SERVICING TO QUALIFIED SERVICE PERSONNEL.  
THIS EQUIPMENT HAS BEEN DESIGNED AND  
ENGINEERED TO PROVIDE SAFE AND RELIABLE  
OPERATION. IN ORDER TO PROLONG THE LIFE  
OF THE UNIT AND PREVENT ACCIDENTAL DAM-  
AGES OR INJURY, PLEASE FOLLOW THESE PRE-  
CAUTIONARY GUIDELINES:  
CAUTION: TO REDUCE THE RISK OF ELECTRIC  
SHOCK, DO NOT OPEN CHASSIS; DO NOT  
DEFEAT OR REMOVE THE GROUND PIN OF THE  
POWER CORD; CONNECT ONLY TO A PROPERLY  
GROUNDED AC POWER OUTLET.  
WARNING: TO REDUCE THE RISK OF FIRE OR  
ELECTRIC SHOCK, DO NOT EXPOSE THIS EQUIP-  
MENT TO RAIN OR MOISTURE.  
CAUTION: OUR AMPLIFIERS ARE CAPABLE OF  
PRODUCING HIGH SOUND PRESSURE LEVELS.  
CONTINUED EXPOSURE TO HIGH SOUND PRES-  
SURE LEVELS CAN CAUSE PERMANENT HEAR-  
ING IMPAIRMENT OR LOSS. USER CAUTION IS  
ADVISED AND EAR PROTECTION IS RECOM-  
MENDED IF UNIT IS OPERATED AT HIGH VOLUME.  
CAUTION: NO USER-SERVICEABLE PARTS  
INSIDE. REFER SERVICING TO QUALIFIED SER-  
VICE PERSONNEL.  
ESTE APARATO HA SIDO DISENADO  
Y
CON-  
PRECAUCION: PARA DISMINUIR EL RIESGO DE  
DESCARGAS ELÉLECTRICAS: (1) NO ABRA LA  
CUBIERTA, (2) NO ES RECOMENDABLE  
REMOVER O DESACTIVAR LA PATA DEL POLO A  
TIERRA DEL CABLE DE CORRIENTE, CONECTE  
CORRECTAMENTE A UNA TOMA DE CORRIENTE  
A TIERRA.  
ADVERTENCIA: PARA EVITAR DESCARGAS  
PRECAUCION: NUESTROS AMPLIFICADORES  
PUEDEN PRODUCIR NIVELES DE PRESION DE  
SONIDO ALTO. EXPOSICION CONTINUADA A LOS  
NIVELES DE PRESION DE SONIDO ALTO PUEDE  
STRUIDO PARA PROVEER ANOS DE OPERACION  
SEGURA Y CONFIABLE. PARA PROLONGAR LA  
VIDA DE ESTA UNIDAD E IMPEDIR DANOS ACCI-  
DENTALES POR FAVOR SIGA ESTAS INSTRUC-  
CIONES PREVENTIVAS:  
ELECTRICAS O PELIGRO DE INCENDIO, NO DEJE  
ESTE APARATO EXPUESTO  
HUMEDAD.  
A
LA LLUVIA  
O
CAUSA DANO PERMANENTE  
A
SU OIDO. ES  
PRECAUCION: NO HAY PIEZAS ADENTRO QUE  
EL USUARIO PUEDE REPARAR. DEJE TODO MAN-  
TENIMIENTO A LOS TÉCNICOS CALIFICADOS.  
ACONSEJADO QUE USE PRECAUCION AL  
USUARIO  
Y
ES RECOMENDADO PROTECCION  
PARA LOS OIDOS SI LA UNIDAD ES OPERADA A  
VOLUMEN ALTO.  
THE CHART BELOW SHOWS THE U.S. GOVERNMENT’S OCCUPATIONAL SAFETY AND HEALTH ADMINISTRATION (OSHA) REGULATIONS WHICH WERE IN EFFECT AT THE TIME OF THIS PUB-  
LICATION FOR PERMISSIBLE NOISE EXPOSURE, PER 29CFR1910.95, TABLE G-16:  
SOUND LEVEL DBA,  
SLOW RESPONSE  
DURATION PER DAY  
IN HOURS  
SOUND LEVEL DBA,  
SLOW RESPONSE  
DURATION PER DAY  
IN HOURS  
SOUND LEVEL DBA,  
SLOW RESPONSE  
DURATION PER DAY  
IN HOURS  
90  
92  
95  
8
6
4
97  
100  
102  
3
2
105  
110  
115  
1
1/2  
1 - 1 1/2  
1/4 or less  
ACCORDING TO OSHA, ANY EXPOSURE IN EXCESS TO THESE AMOUNTS LISTED ABOVE COULD RESULT IN SOME HEARING LOSS.  
"DANGEROUS VOLTAGE"  
“VOLTAJE PELIGROSO”  
"DANGER HAUTE TENSION"  
"GEFAHLICHE SPANNUNG"  
"IT IS NECESSARY FOR THE USER TO REFER TO THE INSTRUCTION MANUAL"  
“ES NECESARIO QUE EL USUARIO SE REFIERA AL MANUAL DE INSTRUCCIONES.”  
"REFERREZ-VOUS AU MANUAL D'UTILISATION"  
EXPLANATION OF GRAPHICAL SYMBOLS:  
EXPLICACION DE SIMBOLOS GRAFICOS:  
=
=
"UNBEDINGT IN DER BEDIENUNGSANLEITUNG NACHSCHLAGEN"  
2
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CSM8/12/16/24 Console Mixer  
Introduction:  
In the world of professional sound reinforcement and audio reproduction there is no  
room for compromise. It is absolutely vital that the emotions of a performance are projected  
to your audience, not just sounds. Your new Crate Pro Audio CSM8/12/16/24 Console Mixer  
is a powerful tool which allows you to successfully bridge the gap between performers and  
audience without losing any of the “life” of the performance in the process. No matter what  
your particular application, your Crate Pro Audio mixer is ready to meet the challenge with a  
level of performance and control unequaled by its competition.  
Crate Pro Audio mixers are the result of our interest in and experience with high-perfor-  
mance audio equipment, combined with our extensive research and development procedures,  
and guided by our love of musical performances. Each mixer is built using a variety of innova-  
tive construction methods making it truly reliable and incredibly roadworthy. Its diverse features  
offer you an extremely high degree of versatility and flexibility regardless of the application. The  
mixer has been thoughtfully designed to keep you constantly in total control of your performing  
environment, always with the best possible sound.  
Features:  
Crate Pro Audio CSM8/12/16/24 mixers combine the latest technology with contemporary  
styling and flexible features. In addition, their exceptionally low noise, incredible headroom  
make them perfect for use on stage, in the home studio, or for “institutional” use. Each of the  
input channels offers you the choice of balanced XLR Low-Z or balanced 1/4" Hi-Z Input jacks,  
an insert jack, a peak/signal LED, gain control, three bands of equalization, four fully-adjustable  
aux sends, a pan control, mute and PFL switches, and a long range channel fader. The master  
section offers left, right and mix XLR and 1/4” balanced output jacks, a PFL out jack, stereo  
Tape In and Out jacks, four aux sends, two stereo aux returns with level and pan controls, dual  
11-step LED meters, switchable Phantom Power, a Headphones jack with level control, PFL left,  
right and mix selector switches, and four master faders: aux 1, left, right, and mix.  
The color-coded knobs help you know at a glance if you’re reaching for a Level knob, an EQ  
control, a Pan pot or Master slider.  
About this Manual:  
This manual is the compilation of many hours of discussions with engineers, musicians,  
experts in the field of sound reproduction as well as novices, along with “hands-on” usage and  
training. While we strive to provide as comprehensive and informative a manual as possible,  
we realize we cannot convey every application imaginable or answer every possible question.  
We have endeavored to cover as much as is practical in this owner’s manual and have provid-  
ed suggested connection diagrams for you to use as a starting point for your application. Your  
Crate Pro Audio dealer can assist you with additional information, or you can visit us on our  
website at www.crateamps.com.  
3
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CSM8/12/16/24 Console Mixer  
The Input Channels:  
1. LOW Z INPUT: The signal output from a low impedance microphone or a low  
impedance line level signal (such as a line out signal from an instrument ampli-  
fier) may be connected here by means of a shielded cable terminated with a  
male XLR plug. Pin 2 = “+,” pin 3 = “–,” and pin 1 = shield.  
2. HIGH Z INPUT: The signal output from a high impedance microphone or a line  
level signal (such as an instrument, rhythm machine, tape deck, etc.) may be  
connected here by means of a shielded cable terminated with a male 1/4” plug.  
Tip = “+,” ring = “–,” and sleeve = shield.  
1
2
3
3. INSERT: A signal processor may be connected here by means of a shielded  
stereo signal cable or shielded “Y” cord. (See page 8.) Ring = send, tip = return,  
and sleeve = ground.  
4. PEAK/SIGNAL LED: This LED will illuminate green when a signal is present at  
the High or Low Z inputs. When the signal nears clipping, the LED will illumi-  
nate red. (See Gain control, #5.)  
4
5
5. GAIN: Use this control to set the input signal level for the channel. Adjust this  
6
7
control so the peak LED (#4) flashes on strong signal peaks.  
6. HIGH: Use this control to adjust the high frequency level for the channel. This  
control allows for 15dB of cut or boost at 10kHz. Typical equalization diagrams  
are shown on page 7.  
8
9
7. MID: Use this control to adjust the midrange frequency level for the channel.  
This control allows for 15dB of cut or boost at 2kHz. Typical equalization dia-  
grams are shown on page 7.  
8. LOW: Use this control to adjust the low frequency level for the channel. This  
control allows for 15dB of cut or boost at 100Hz. Typical equalization diagrams  
are shown on page 7.  
10  
11  
9. AUX 1, AUX 2: Use these controls to set the channel’s output signal level at the  
aux 1 and aux 2 send jacks (#17, page 5). These are pre-EQ, pre-fader, and are  
typically used as monitor sends. Examples of some typical connection methods  
are shown on pages 8–13.  
12  
13  
10.AUX 3, AUX 4: Use these controls to set the channel’s output signal level at the  
aux 3 and aux 4 send jacks (#17, page 5). These are post-EQ, post-fader, and  
are typically used as effects loop sends. Examples of some typical connection  
methods are shown on pages 8–13.  
11. PAN: Use these controls to set the amount of the channel’s output signal sent to  
the left and right master faders (#30, page 6) and the left and right balanced out-  
put jacks (#15, page 5).  
14  
12.MUTE: This switch, when depressed, mutes the channel’s output signal sent to the  
left, right and mix master faders (#30, 31, page 6).  
13.PFL: This switch, when depressed, sends the channel’s post-EQ, pre-fader signal  
to the headphones jack (#28, page 6) and the PFL output jack (#18, page 5).  
14.FADER: Use this control to set the channel‘s signal level output sent to the left,  
right and mix master faders (#31, 32, page 6) and the aux 3 and aux 4 send jacks  
(#17, page 5).  
4
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CSM8/12/16/24 Console Mixer  
The Master Section:  
15. LEFT, RIGHT AND MIX BALANCED OUTPUTS: Use  
these jacks to send the mixer’s output signal(s) to the  
house power amplifier(s) (see pages 9–13). For the XLR  
jacks, pin 2 = “+,” pin 3 = “–,” and pin 1 = shield. For  
the 1/4” jacks, tip = “+,” ring = “–,” and sleeve = shield.  
16  
16. TAPE IN/TAPE OUT JACKS: Use these jacks to connect  
to the record and playback jacks of a cassette tape deck.  
Because the tape in jacks are fed directly into the left  
and right master faders, use the tape deck’s output level  
control or an in-line attenuator to adjust the level of the  
playback signal.  
15  
17  
18  
19  
17. AUX SEND JACKS: Use these jacks to send the aux sig-  
nals to your monitor amps and/or external effects. Aux 1  
and 2 are sends only, while aux 3 and 4 can be used as  
an effects loop along with the aux 3 and 4 return jacks  
(#19). (See pages 8–13). The mix for each aux send jack  
is set by the channel aux controls (#9, 10). The master  
aux 1 fader (#30, page 6) sets the overall signal output  
level for the aux 1 jack, while the aux 2, 3 and 4 send  
controls (#24, page 6) set the overall signal output level  
for the aux 2, 3 and 4 jacks.  
20  
21  
18. PFL OUTPUT JACK: Use this jack to send the channel’s  
PFL signal outputs to a studio monitor power  
amp/speaker or to a headphone distribution box for  
additional monitoring capabilities.  
22  
23  
24  
19. AUX RETURN JACKS: Use these jacks to return the  
processed signal from an external effect into the master  
mix. These jacks are stereo 1/4” connectors – ring =  
right, tip = left, sleeve = shield.  
25  
26  
27  
28  
20. POWER: This switch applies the power to the mixer. The  
mixer is on when the top of the switch is depressed, off  
when the bottom of the switch is depressed. The adja-  
cent LED illuminates when the power is on.  
29  
21: OUTPUT LED METERS/PEAK INDICATORS: These LED  
meters monitor the output signals sent to the balanced  
output jacks (#15). The meter selector switch (#22)  
determines whether the meters monitor the left and right  
output signals or the aux 1 and mix output signals.  
When the LEDs illuminate into the upper red areas, the  
signals are near clipping and may need to be reduced to  
avoid distortion.  
30  
31  
32  
22: METER SELECTOR SWITCH: When the switch is in the  
out position, the LED meters (#21) monitor the left and  
right output signals. When the switch is depressed, the  
LED meters monitor the aux 1 and mix output signals.  
(continued...–––––  
>
)
5
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CSM8/12/16/24 Console Mixer  
The Master Section (continued):  
16  
15  
23: PHANTOM POWER: This switch, when depressed, applies 48  
volts DC to pins 2 and 3 of the each channel’s low Z input jacks  
(#1, page 4) to accommodate microphones which require a  
source of phantom power for proper operation. (Mics not  
requiring phantom power are not affected by the presence of the  
DC voltage.)  
17  
18  
19  
24. AUX SEND LEVELS: Use these controls to set the output levels  
for the signals at the aux 2, 3 and 4 send jacks (#17, page 5).  
20  
25. AUX RETURNS: Use these controls to adjust the level of the  
signals from the aux 3 and 4 return jacks (#19, page 5).  
26. AUX PANS: Use these controls to set the balance of the aux 3  
21  
and 4 return signal sent to the left and right master faders (#31).  
27. HEADPHONES/PFL LEVEL: Use this control to adjust the output  
signal level at the headphones/PFL jack (#28).  
28. HEADPHONES/PFL JACK: Use this jack to connect a pair of  
stereo headphones to the mixer. The signal at this jack is taken  
from the PFL bus, therefore the channel PFL buttons must be  
depressed in order to hear their signals through the headphones.  
22  
23  
24  
25  
27  
28  
29. PFL LEFT/RIGHT/MIX: These switches, when depressed, send  
the corresponding PFL signals to the headphones/PFL jack (#28)  
and to the PFL output jack (#18).  
26  
30. AUX 1 MASTER FADER: Use this control to set the overall out-  
put signal level at the aux 1 send jack (#17, page 5). A fader has  
been chosen to provide ease of control of aux 1 since this is typ-  
ically used as an output signal for the stage monitors.  
29  
31. LEFT/RIGHT MASTER FADERS: Use these controls to set the  
overall output signal levels at the left and right balanced output  
jacks (#15, page 5), as well as the signal level sent to the mix  
master fader (#32).  
30  
31  
32  
32. MIX MASTER FADER: Use this control to set the overall output  
signal level at the mix balanced output jacks (#15, page 5). The  
left and right master faders (#31) must be set at an appropriate  
level so that a signal of sufficient amplitude is sent to the mix  
master fader.  
6
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CSM8/12/16/24 Console Mixer  
Equalization Diagrams:  
Each input channel of the CSM8/12/16/24 has three bands of equalization which let you alter the tonal characteristics  
of the input signal. The EQs may be used to add “color” or to compensate for inadequacies of the original signal. They also  
may be used to cut frequencies to help eliminate unnatural sounds or to de-emphasize over-pronounced tones, and to help  
prevent acoustic feedback. Each EQ has a range of 30dB (+/-15dB).  
•The high EQ for each channel is a “shelving” type, with an action point (+6dB) at 6kHz, reaching maximum  
effect at 10kHz and above.  
•The middle EQ for each channel is a “peaking” type, which affects frequencies from 800Hz to 5kHz, centered  
at 2kHz.  
•The low EQ for each channel is a “shelving” type with an action point (+6dB) at 250Hz, reaching maximum  
effect at 100Hz and below.  
+20  
+10  
0dB  
-10  
-20  
20  
Hz  
50  
100  
200  
500  
1k  
2k  
5k  
10k  
20k  
Differences in Cable Types:  
This manual makes reference to different types of cables; in particular, balanced and unbalanced signal cables and  
speaker cables. These are not the only types of cables associated with sound reinforcement, but they are similar enough to  
each other to warrant a more descriptive explanation. For example, the three 1/4”-terminated cables below may look alike  
at first, but upon closer examination their differences become apparent.  
BALANCED SIGNAL CABLE:  
TIP  
TIP  
RING  
TIP = SIGNAL "+" (IN-PHASE)  
RING = SIGNAL "-" (OUT-OF-PHASE)  
SLEEVE = SHIELD  
SLEEVE  
RING  
SLEEVE  
Care must be taken to  
avoid using SIGNAL cables  
in place of SPEAKER cables  
and vice-versa.  
UNBALANCED SIGNAL CABLE:  
TIP  
TIP  
TIP = SIGNAL  
SLEEVE = SHIELD  
Signal cables aren’t made  
to handle the power which  
speaker cables do; speaker  
cables are not shielded and  
pick up external signals,  
resulting in excessive hum  
and buzzing.  
SLEEVE  
SLEEVE  
SPEAKER CABLE:  
TIP  
TIP  
TIP = SIGNAL "+"  
SLEEVE = SIGNAL "-"  
*Speaker cables typically do not use or require a shield.  
SLEEVE  
SLEEVE  
BALANCED MIC CABLE:  
PIN 2 = SIGNAL "+" (IN-PHASE)  
PIN 3 = SIGNAL "-" (OUT-OF-PHASE)  
PIN 1 = SHIELD  
1
2
3
7
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CSM8/12/16/24 Console Mixer  
Connecting External Signal Processors:  
There are several ways to use external signal processors with the CSM8/12/16/24. Each of the mixer’s input channels has its  
own Insert jack, allowing a processor to be used on that particular channel. Figures 1 and 2 below show two ways of con-  
necting a signal processor to the channel Insert jacks.  
The mixer’s master section has two stereo effects loops available (Aux 3 and Aux 4), allowing a processor to be added to any  
or all of the input signals. Figures 3 and 4 below show the basic connection of two types of stereo processors to the aux  
loops.  
Each channel’s Aux 3 and Aux 4 levels control the amount of signal sent from each channel to the aux loops. The master Aux  
3 and Aux 4 Send, Return and Pan control the amount of signal sent to the processor, the amount of processed signal  
returned to the mix, and how much of the processed signal is applied to the left and right output signals.  
(See pages 4 through 6 for additional information on the insert jacks, the aux loops, and their controls.)  
Figure 1: Connecting an external signal processor to the insert jack of the  
mixer via the processor's insert jack:  
Figure 2: Connecting an external signal processor to the insert jack of the mixer  
via the processor's input/output jacks:  
INSERT  
JACK  
INSERT  
JACK  
(TIP = RETURN,  
RING = SEND,  
SLEEVE = GROUND)  
Crate #CYC6MS  
insert adapter cable  
Stereo 1/4"  
T/R/S cable  
INSERT  
JACK  
OUTPUT  
JACK  
INPUT  
JACK  
Figure 3: Connecting an external signal processor to the mixer's aux loop:  
(Stereo processor with left/right output jacks)  
Figure 4: Connecting an external signal processor to the mixer's aux loop:  
(Stereo processor with stereo output jack)  
AUX 3/  
AUX 4  
AUX 3/  
AUX 4  
SEND  
JACK  
AUX 3/  
AUX 4  
AUX 3/  
AUX 4  
SEND  
JACK  
(TIP = LEFT,  
RING = RIGHT,  
SLEEVE = GROUND)  
(TIP = LEFT,  
RING = RIGHT,  
SLEEVE = GROUND)  
RETURN  
JACK  
RETURN  
JACK  
Mono 1/4"  
T/S cable  
Mono 1/4"  
T/S cable  
Crate #CYC6MS  
insert adapter cable  
Stereo 1/4"  
T/R/S cable  
LEFT  
OUTPUT  
JACK  
RIGHT  
OUTPUT  
JACK  
STEREO  
OUTPUT  
JACK  
INPUT  
JACK  
INPUT  
JACK  
(See your Crate Pro Audio dealer for the CYC6MS adapter cable.)  
8
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CSM8/12/16/24 Console Mixer  
Applications: Basic Mono Operation:  
This setup shows one way of using the mixer and one stereo power amplifier to run both the house speakers and the stage  
monitors. Two mono power amplifiers may be used in place of the one stereo amplifier.  
Connect the components as follows:  
(A) Connect a balanced or unbalanced signal cable between the mixer’s Mix Balanced Output and the power amplifier’s  
Channel 1 Input.  
(B) Connect a speaker cable between the power amplifier’s Channel 1 Outputs and the house speakers’ Inputs.  
(C) Connect an unbalanced signal cable between the mixer’s Aux 1 Send and the power amplifier’s Channel 2 Input.  
(D) Connect a speaker cable between the power amplifier’s Channel 2 Outputs and the monitor speakers’ Inputs.  
(Note the optional use of a graphic equalizer in-line with the connections between the mixer and the power amplifier as shown below.)  
Please note that the sample connections  
shown in the Applications sections are  
only guidelines. They are intended to  
provide a starting point from which you  
may assemble a system that will best suit  
your particular needs.  
HOUSE  
SPEAKERS  
(PS115HD,  
PS215HDT,  
etc.)  
MONITOR  
SPEAKERS  
(M112HD,  
Also note that the models referenced for  
additional equipment are only sugges-  
tions. Your Crate Pro Audio dealer can  
assist you in selecting the components  
best suited for your sound system.  
M115HD, etc.)  
CH.1  
OUTPUT  
CH.2  
OUTPUT  
B
D
STEREO  
POWER AMP  
(SPA1400, etc.)  
CH.1  
INPUT  
CH.2  
INPUT  
CH.1  
OUTPUT  
CH.2  
OUTPUT  
DUAL  
GRAPHIC EQ  
(LS3231,  
LS2215)  
CH.1  
INPUT  
CH.2  
INPUT  
A
C
MIX  
BALANCED  
OUTPUT  
AUX 1  
SEND  
L
R
CSM8/12/16/24  
(PAN FULL (PAN FULL  
LEFT) RIGHT)  
Controlling The Mixer’s Output Levels:  
• Monitors: Use the Aux 1 master slider (#30, page 6) to set the level of the output signal for the monitors.  
• Mains (House Speakers): Use the Mix master slider (#32, page 6) to set the level of the output signal for the house speakers.  
NOTE: The Mix output is a combination of the left and right channels. Therefore, the Left and Right master sliders (#31,  
page 6) must be set so a signal of sufficient strength is available for the Mix master slider. Use the LED Output Meters  
(#21, page 5) to visually monitor the output signal levels of the left and right channels.  
9
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