Hi, I was wondering if anyone here knows the specs on the Aura Force 400q-a amplifier? I have the chance to pick one up locally, but I can't find solid info on it. I searched here and the link for a picture of the specs is gone. Also, how is the SQ on these series of amps vs. the Aura RPM or MR series, and were they underrated? The one I'm looking at has a silver finish. Any info would be appreciated. Thanks!