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14

AMX-912

1. 

Connect the microphones or line input sources like a CD player or Keyboard to the input jacks. 

Do 

 

not connect 

both Mic and Line to any one channel simultaneously

. Connect the output jacks to the desired equipment. Refer 

APPLICATIONS Section, page # 12, 13. 

2. 

Keep all the rotary control settings of the mixer at ‘0’ position. 

3. 

Keep all the Channel Faders at ‘0’ position and the Left/Right Master Faders at minimum position.

4. 

Keep all the channel ON/OFF switches and Tape Play Switch at OFF positions.

5. 

Connect the AC Lead of the mixer to the nearest mains socket and connect the battery lead to car battery for 

interruption free operation. Refer Power Supply Section, page # 10.

6. 

Now switch ‘On’ the Mixer and the Input Sources.

7. 

Switch ‘On’ 

Channel-1 only

, through its Channel On/Off Switch.

8. 

Connect the Headphones and position the Headphone Gain Control for a comfortable audible level.

9. 

Increase the Gain Control of 

Channel-1 only

 till the Clip  LED lights up. Now  decrease the gain control  so 

that the Clip LED just flickers. This is the ideal setting of the gain control.

10.   Set the Bass & Treble Controls to the desired levels. Changing the settings of the Bass & Treble Controls may 

effect the overall gain. Therefore the Gain Control should be subsequently adjusted to bring the Clip 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 

Pan Control

 to set the level of the signal in the Left & Right Outputs. Turning the control fully anti-

clockwise will send the signal only to the Left Output of the mixer, and turning it clockwise will send it to the 

Right Output. 

15.  Once 

Channel-1

 is set, do not disturb the control settings of this channel. Then switch ‘Off’ this channel through 

the Channel On/Off Switch. 

16.  Repeat the above procedure for setting the remaining 8 channels.

17.  After all the input channels have been set and switched ‘On’, the Peak LED of the Echo Section may start 

glowing continuously. Reduce the Echo Control level of individual channels and Echo Section simultaneously 

so that the Peak LED of the Echo Section goes below the flickering level. 

18.  After all the channels are set adjust the individual Channel Faders to obtain the desired MIX at the outputs.

19.  Now adjust the Master Faders for desired output levels. However take care that the red LEDs of the LED 

Bargraph Array do not glow continuously. Refer Output Section, page # 7.

20.  For Recording and Playback refer to the Tape Section, page # 9.

l

 

Operation

Содержание AMX-912

Страница 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 ...

Страница 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...

Страница 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 ...

Страница 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...

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

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 12: ...12 AMX 912 l Applications ...

Страница 13: ...13 AMX 912 l Applications ...

Страница 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...

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

Страница 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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