The Input Section - Ahuja AMX-912 Operation Manual

The Input Section

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1. MIC INPUT
Input through balanced 1/4" phone jacks for accepting both balanced and
unbalanced signals (plugs). For low impedance microphones, 200 ohms to
1K ohms.
Wiring: Tip
Ring
Sleeve
2. LINE INPUT
Input through balanced 1/4" phone jacks and accepts both balanced and
unbalanced signals (plugs) from sources such as Cassette Players, CD Players,
Keyboards, Drum Machines etc.
Wiring: Tip
Ring
Sleeve
3. GAIN CONTROL
The gain control sets the signal level for the Mic. and Line inputs. The Clip
LED indicates the Max. level of gain control settings.
4. TREBLE CONTROL
The Treble control gives 12 dB of boost or cut at 10 kHz. High boost livens up
a "dead" room acoustics imbalance.
5. BASS CONTROL
The Bass control gives 12 dB of boost or cut at 100Hz. Low cut avoids
boominess in some rooms.
6. ECHO CONTROL
Echo 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 Stereo mode. In Mono mode, the setting
of this control is ineffective.
8. ON/OFF SWITCH
This switch is provided for switching OFF of the input channel without disturbing
the control settings.
9. CLIP
The Clip LED lights up when the signal in the channel is approaching overload
(clip) level. Setting this correctly ensures maximum "Signal to Noise ratio",
that is the best signal level with the minimum amount of background noise. It
should be set just before the overload level. Occasional flashing of the LED
during loud sounds is OK.
10. CHANNEL FADER
The Fader "slider" control determines the output level of the channel in the
overall mix.
AMX-912
Hot (+ve phase)
Cold (-ve phase)
Ground
Hot (+ve phase)
Cold (-ve phase)
Ground
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