I bought one of this DAS 300 from an online store 2 weeks ago, the problem I found with the DAS series, is Peak Protection issue. I hook this up to a BMB CSN 455 Speakers, I turn on the volume not even half way, the Amplifier LCD screen show "Protection On" and this cause the amplifer to automatically reduce the music and mic volume to prevent damage to speakers or amplifier.
The seller called BMB and BMB rep said my speakers are over power my DAS 300 amp so that is why it did that. I understaind the rep theory, but the only problem with his answer is that I even hook the DAS 300 out to a 2000 watts Power Amp the BMB Amp still does the same thing.
I end up returned the amp and purchased an Idolpro,