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AMX-912

1. 

LINE  OUTPUT HI

 

Unbalanced High Line Outputs have been provided for the Left and 

Right channels through 1/4” phone jacks. These are for connecting 

to the LINE INPUT of the Power Amplifier. The Line Output levels  

( 0mV to 775mV ) can be adjusted  by Master Faders.

 

Wiring: Tip 

Signal

 

 

Sleeve Ground

2. 

LINE OUTPUT LO

 

Unbalanced  Low  Line  Output    have  been  provided  for  the  Left 

and Right channels through 1/4” phone jacks. This output  is for 

connecting to the AUX INPUT of a Monitor/Power Amplifier. The 

Preamplfier Output (0mV to 250mV) can be adjusted by Master 

Faders. This lower  signal  output has been given in addition to the 

Line Output as many amplifiers have only an

 

Aux Input. This can also be used for 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 output is available through 

any of the Left or Right output jacks. If the Left Output jack is used, 

then the signal level can be set by the Left Master Fader. Similarly, 

the mono signal from the Right Output jack can be set  by the Right 

Master Fader.

5. 

LEFT / RIGHT MASTER FADERS

 

The  Left & Right faders are the master output level controls. These 

determine the level of all the signals ( mix ) sent by the Channel  

Faders and Tape Playback, to the L/R Line Outputs High and Low 

Output jacks.

l

 

The Output Section

1

2

3

4

5

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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