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The CX-124 and the CX-164 are designed with the electronically  balanced inputs, however, optional in-

put transformer  IT-M4CX (for microphone input) or IT-L4CX (for microphone or line inputs) can be built-
in the consoles,  and their specifications are changed into the transformer  input  system. The input  trans-

former is used only for four channels.

How to assemble the input transformer.

Turn the Power switch to OFF and ensure to unplug the AC  power cord from the AC outlet.

Remove the eight fixing screws on the rear panel.

Lift the rear panel up to remove it, and for fixing, insert groove 

of 

rear 

panel into 

both metals on

the left and right side panels.

Take out 

connector from 

part.

Fix the input transformer  using the attached three screws as shown in the figure.

Insert 

connector into 

part.

Insert connector 

into part.

Assemble the  rear panel  in  reverse manner of removing it

Models

Frequency Response

Distortion

Maximum  Input Level

Constant Loss

Impedance

IT-M4CX

50 Hz~15 kHz within ±1.0 dB

Less than 0.4%  (50 Hz,  –20 dB)

–2 dB  50 Hz  1%

Within 1.5 dB at 1  kHz

600 /600

IT-L4CX

30 Hz~20 kHz within ±0.15 dB

Less than 0.2%  (50 Hz,  +5 dB)

+ 11  dB  50  Hz  1%

Within 1.5 dB at 1  kHz

600 /600

Note:

 Do not touch other parts inside

unit than  instructed  in this assemb-
ling manual.

This will lead to failures of the mix-

ing console.

– 12 –

Assembling  input  transformers

Specifications for input  transformers

Summary of Contents for CX-124

Page 1: ...e follow the instructions in this manual to obtain the optimum results from these units We also recommend you to keep this manual handy for future re ference TOACorporation KOBE JAPAN Operating Instru...

Page 2: ...ition to prevent damage to speakers etc XLR type audio connectors are factory wired as follows Pin 1 ground shield pin 2 cold low minus and pin 3 hot high plus Where microphone cables connected to uni...

Page 3: ...to meet a wide range of requirements The high performance and modular con struction assures reliability easy maintenance and service ability 2 channel Stereo input is provided in addition to the chann...

Page 4: ...rn red from green or only flash red occasionally This will ensure lowest distortion level and optimum sig nal to noise ratio High Equalizer Control HIGH The High EQ control alters the high frequency r...

Page 5: ...witch for localization of sound image Channel Switch CH This switch connects or disconnects the input signal to the mixing busses The LED indicator lights orange when the channel on off switch is on A...

Page 6: ...Headphones and Cue output Stereo Input Aux 1 Control AUX 1 This control determines the level of the pre fader stereo input signal to be fed to the Aux 1 buss Stereo Input Aux 2 Control AUX 2 This con...

Page 7: ...Output section GROUP STEREO 7...

Page 8: ...D bargraph meter indicates the Group output 1 2 3 4 Aux Send 1 2 3 Sum output or Stereo output L R The meter indicates 0 dB with 4 dB nominal output Meter Select Switch METER The meter indicates the G...

Page 9: ...k Accessory Output Jack ACCESSORY OUT This standard 1 4 phone jack is unbalanced with a nominal level of 10 dB and an impedance of 1k ohms Phantom Power Switch PHANTOM The Phantom power switch on each...

Page 10: ...f the effect Nominal output level is 4 dB with an impedance of 1k ohms Recording Output Jack REC OUT These RCA pin jacks are unbalanced with a nominal output level of 10 dB and an impedance of 1k ohms...

Page 11: ...Tapedeck for play back Effector etc Microphone Power amplifier Main speaker Tapedeck for recording Monitor speaker Power amplifier 11 Connection diagram for CX 124 and CX 164...

Page 12: ...rear panel into both metals on the left and right side panels Take out connector from part Fix the input transformer using the attached three screws as shown in the figure Insert connector into part I...

Page 13: ...Connector XLR 3 31 or equivalent Balanced Phone Jack Balanced Phone Jack Unbalanced Pin Jack Phone Jack Unbalanced Output GROUP OUT 1 4 STEREO OUT L R SUM OUT AUX SEND 1 2 3 ACCESSORY OUT 1 12 16 CUE...

Page 14: ...14 Block diagram...

Page 15: ...15 Level diagram...

Page 16: ...Hz 15 dB Shelving MID 300 Hz 4 kHz variable 15 dB Peaking HIGH 20 kHz 15 dB Shelving Peak Indicator LED turns on when the pre fader and post EQ signal reaches 6dB before clip Phantom Power 24V DC AC L...

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