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Why do active pickups require 9v batteries instead of some other kind of battery like AA? (lemmy.ca)

submitted 3 days ago by [email protected] to c/[email protected]

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[–] [email protected] 0 points 3 days ago

+4dBu is 3.472 V peak to peak. You'd need 3 batteries to hit full line level, before you even get into the 0.7v silicon junction losses.

Remember that you're making an AC signal from a DC power supply. The output is centered at half the battery voltage. It's exactly the same as a class A amplifier.

People already use 9V for their pedals too.