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8

AMX-912

ECHO

 - Echo Effect is used to repeat the original 

sound many times to give multiple voice effect and 

is used for vocals. The Control settings for Echo 

are as shown in the diag. 

REVERB

 - Reverb is used for giving Hall Effect 

to the original sound as repeated reflecting sound 

raises overall level of the signal. This is also used 

for public announcement in Stadia and Open Air 

Performances. The Control settings for Reverb are 

as shown in the diag. 

CHORUS

 - Chorus Effect is used by a singer to 

create an effect as if a Group is performing. The 

control settings for Chorus are as shown in the 

diag. 

The ECHO section  provides ECHO, REVERB and CHORUS effects to all the Input channels. These Effects 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 switch is in OFF position, AMX-912 operates as Mixer 

only without Echo/Effects on all the inputs irrespective of the 

settings of the Echo controls of individual channels.

5. 

PEAK LED

 

 

The Echo Controls & Fader Controls of each channel and Level 

Control of Echo Section should be set at a level  just below the 

flickering level of this  Peak LED. This LED is for optimizing the 

Inputs and Echo levels. The settings of the Channel Faders & 

Master Faders have no effect on this LED. 

l

 

The Echo 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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