Front Panel Operation; Input Channels - Yamaha MC1204 Operating Manual

FRONT PANEL OPERATION
Input Channels
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PAD switch, GAIN control and PEAK LED
These adjust the input sensitivity of the MC mixers over a wide range. The PAD switch
inserts a 20 dB pad ahead of the head amplifier, and the GAIN control continuously
adjusts the sensitivity of the head amplifier between - 20 and - 60 dB.
The PEAK LED lights whenever the channel's post-EO, pre-fader signal comes within
3 dB of clipping, warning the operator of impending channel overload .
8 HIGH, MID FREO/MID and LOW EO controls
These continuously variable controls allow ± 15 dB of equalization in the following
frequency ranges :
HIGH .. .. .................... .. ....................... ... ... ... .. ... .... .............. 1 0 kHz shelving .
MID/FREOUENCY ........ .. .''''''' ''' ......... ... ........ , .. .. .. .. , ........ ... 350 Hz-5 kHz
peaking.
LOW .............................................. .. ...... ....... ..................... 100 Hz shelving.
Response is flat at the center position .
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FB 1 an FB 2 send contro s
FREOUENCY
These controls feed a pre-EO, pre-fader signal to the Foldback 1 and Foldback 2
busses which feed the FB 1 and FB 2 outputs, respectively.
These busses would normally be used for stage foldback or monitor speaker systems.
Internal P.e. board jumpers are provided for changing the foldbacks to post EO and
fader for use as additional echo/effect sends . This modification can be made at any
Yamaha Service Center .
Post Insert 1/0
Pre EO
Post EO
Pre Fader
Post Fader
F8 1.2
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FACTORY SET
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ECHO 1.2
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ECHO 1 and ECHO 2 controls
Adjusts the amount of post -EO, post-fader signal fed from that channel to the ECHO 1
and ECHO 2 busses, which feed the ECHO 1 and ECHO 2 outputs, respectively .
The ecM busses may be used to feed outboard effect devices or as additional
foldback/monitor sends.
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