I'd been using an AMC 3020 integrated amp to power my Paradigm Atom bookshelfers off my Echo Gina card; this is an integrated amp that has the unusual step of placing "trim" controls on the various inputs, and a "mix" choice on the output knob, which allows more than one source to play-through...so I can have, say, two soundcards going at the same time. Or a cassette and whatever soundcard is the output of something I'm playing Adobe Audition from. Some sort of power-flux "event" must have fried it, knocking out the power source as well as other major components of the amp. It's toast. Once I solve the power issue - probably need a UPS unit - should I replace the AMC, or seek out another amp? I don't know of another model with the "mix" option on it.