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For questions specifically about solid-body or semi-acoustic electric guitars. For acoustic and electro-acoustic guitars, or guitar playing in general, see the "guitar" tag.

2 votes

My guitar has no sound when the gain knob is turned off. Do all amps need need a little gain...

In terms of the electric circuit in the amplifier, gain is defined like: V(in) x Gain = V(out) That is, it's not added to the input, it's a multiplier. If you turn the gain down to zero, the output …
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