I guess what I need to ask is if hearing any hum at all (>0db @ 0m, I'll put my ear on the casing) is going to be an acceptable reason to exchange the amp for another. People talk about the great serivice from Outlaw, but are they gentle with raving fanatics?

Also, has anyone experiencing hum tried to tighten the transformer mount? And does Outlaw specify a rubber mount under the trans, and would adding one void the warranty?