That's odd, mine is dead quiet. Be sure to check your gain structure to make sure you are at unity gain.I've tried it though the effects loop but it hissed quite a bit. If I go through effects return does it bypass the eq on the amp?
Yes, if you go in through the effects return you are by passing the Rumble front end and using the ZOOM B3 as a pre-amp. This is the way to go if you are using the various amp models.
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