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ampeg m12 channels

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  • ampeg m12 channels

    Can any of you shine some light on the behavior of the different channels of my ampeg m-12 (6v6 version)?

    There are 4 inputs, 2 instrument and 2 mike or accordion.

    Ch1 is associated with the instrument inputs. It seems like this channel has more noise with and without anything plugged in.

    Ch2 is the mike/accordion input. This channel is not nearly as noisy and the volume seems too peak around 6 then attenuate after.

    I've looked at the schematic out there and I don't quite think they are behaving as shown. I was expecting Ch2 to be "high" input and give more more overdrive with a guitar plugged in but that's not necessary the case.

    Thanks for your help!
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