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AMX-912

 A 4 way RCA connector has been provided for connecting a Stereo Cassette Recorder to this audio mixer for Playback 

/ Recording. Alternatively, a separate Stereo Cassette Recorder and a Stereo Cassette Player can be simultaneously 

connected for Recording and Playback respectively. This facility allows use of the other 9 input channels for connecting 

input sources other than a Stereo Cassette Player.

1. 

RECORDING Outputs

 

The Left  & Right RCA  Sockets marked “REC”  carry the stereo mix signal 

for connecting to the inputs of a stereo  cassette recorder for Recording the 

program.These can also be connected to the Aux Input of an additional Monitor 

/ Power Amplifier for driving them. The recording output level from  AMX-912 

is fixed (240mV) and is not affected by the settings of Master Faders and Tape 

Gain Controls.

2. 

PLAYBACK Inputs

 

The Left & Right RCA Sockets marked “PLAY”  are for connecting to the Play 

Output of a stereo cassette player or the same cassette recorder being used 

for recording. The playback signals are routed to the main stereo mix of

 

which  the level is set by the Master Faders. However, the level of the playback 

mix into the main mix is set by the Gain Control. The input sensitivity of the 

Playback Inputs is 50mV. It can be adjusted from 50mV to 1V by the Gain 

 

Control  to  accept  input  signal  from  other  sources  such  as  a 

CD Player, 

Electronic Keyboard, Drum Machine, Electronic Guitars

 etc., to this 

mixer.

3. 

PLAY ON/OFF Switch

 

A Switch has been provided for switching OFF the playback music source 

connected to the mixer.

4.  PLAY GAIN Control

      A Gain Control is provided to set the Level of playback program to the overall program mix.

THE HEADPHONES SECTION

A Stereo Headphone Output is available through a 1/4” stereo jack for 

program monitoring.

 

Wiring: 

Tip 

  Left Signal

 

 

Ring 

  Right Signal

 

 

Sleeve   Ground

Do not use Headphones of less than 8 Ohms Impedance.

1. 

GAIN Control 

 

A  Dual  Gain  Control  has  been  provided  for  setting  the  level  of  the 

Headphone Output.

2. 

HEADPHONE Output

 

An Output has been provided through a 1/4” stereo jack for connecting a 

Headphone for monitoring the overall program

l

 

The Tape Section

1

2

4

3

1

2

Summary of Contents for AMX-912

Page 1: ...2 Please read this manual thoroughly before making connections and turning on the power Following the instructions in this manual will enable you to obtain optimum performance from your new AHUJA PA Audio Mixer Please retain this manual for future reference ...

Page 2: ...e power supply cord away from heaters harmful chemicals Do not place heavy objects on the power cord Operation on Generator When operating the equipment on a generator make sure it is switched OFF till the generator voltage has stabilized and then only switch the equipment ON Grounding or Earthing The equipment must be earthed properly before operating it to avoid electric shock A wire from the Ea...

Page 3: ...ar Panel 5 l The Input Section 6 l The Output Section 7 l The Echo Section 8 l The Tape Section 9 l The Headphone Section 9 l Power Supply Section 10 l Rack Mounting 11 l Applications 12 l Operation 14 l Plugs Wiring 15 l Specifications 16 l Table of Contents ...

Page 4: ... Echo mix level controls for each input Pan controls for each input channel for adjusting the routing of the input channel signal to the Left or Right outputs On Off switch for each input channel Fader control is provided for each input channel Digital signal processing used for Echo Reverb and Chorus effects Echo section for Echo Reverb and Chorus effects through Repeat Delay and Level controls E...

Page 5: ...5 AMX 912 l Front Rear Panel FRONT PANEL REAR PANEL ...

Page 6: ... level control is for deciding the level of that channel in the final Echo Mix This is post Equalizer Bass Treble and post Fader Therefore the level will be affected by the setting of the Fader 7 PAN CONTROL This control routes the channel to either Left or Right Output Centering the control positions the signal equally in both the outputs This is usable when the mixer output is connected in the S...

Page 7: ...connecting to a monitor amplifier while the Line Output is connected to the main power amplifier 3 LED BARGRAPH There are 2 colour 10 segment LED Arrays which display the Left Right output levels The 0dB LEDs correspond to 250mV LO Line output and 775mV HI Line output 4 MONO STEREO OUTPUT SWITCH Mono or Stereo Output mode can be selected through this switch In case of Mono the same mixed mono outp...

Page 8: ...s can be obtained by different settings of Delay Control Repeat Control and Level Control The Echo Section can be switched Off through a On Off switch 1 DELAY Control For setting the time between ECHO repetitions 2 REPEAT Control This controls the number of repetitions of ECHO The higher the setting the more repetitions 3 LEVEL Control For setting the ECHO level 4 ECHO ON OFF Switch When this swit...

Page 9: ...r being used for recording The playback signals are routed to the main stereo mix of which the level is set by the Master Faders However the level of the playback mix into the main mix is set by the Gain Control The input sensitivity of the Playback Inputs is 50mV It can be adjusted from 50mV to 1V by the Gain Control to accept input signal from other sources such as a CD Player Electronic Keyboar...

Page 10: ...to the DC Socket as shown in the diag In case of power failure the Mixer continues to operate uninterrupted through the standby 24V DC Supply Make sure the battery polarity is connected correctly 4 EARTH TERMINAL Before operating the Mixer should be grounded by connecting a wire from this Earth Terminal to a water pipe or an electrical earth Use 2x12V car batteries exclusively for this equipment a...

Page 11: ...2 Nos on the Rear Panel Pull in the Power Supply Plate with the AC Mains cord 3 Tilt the Bottom Panel Cabinet towards the right side and remove the Blank Plate from the Bottom Panel by unscrewing the mounting screws 2 Nos 4 Pull out the AC Mains cord attached to the Power Supply Plate through the opening on the Bottom Panel Now fix the Power Supply Plate on the Bottom Panel using the mounting scre...

Page 12: ...12 AMX 912 l Applications ...

Page 13: ...13 AMX 912 l Applications ...

Page 14: ...ip LED to the correct level 11 Now move the Slider Fader control of Channel 1 only to position 7 12 In case Echo Effect is desired on Channel 1 move the Echo Control of Channel 1 to position 7 13 Switch On the Echo Section and set the Echo Section Delay Repeat Level Controls for the desired effects Refer to the Echo Section for the settings of the Delay Repeat Level Controls page 8 14 Adjust the P...

Page 15: ...15 AMX 912 PLUGS WIRING The wiring for various jacks Input Output Devices is as shown below l Operation ...

Page 16: ...dsupport airtelmail in l Specifications MIC INPUT Impedance Gain 2K ohms 62 dB LINE INPUT Impedance Gain 20K ohms Balanced 42 dB 10K ohms Unbalanced 42 dB THD 0 08 FREQUENCY RESPONSE L R Line Output High 30 Hz 20 KHz 0 1 dB L R Line Output Low 30 Hz 20 KHz 0 1 dB EQUALIZATION Bass Treble 12 dB at 100 Hz 10KHz CLIP LED INDICATION 4 dB prior to true clip OUTPUTS Line Output LO L R Nominal Max Level ...

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