QSC Amps (PLX/DCA) Other than the limited information available on their website, can someone tell me why one would even consider these amps? Does anyone know what the amplification is based upon (MOSFET?), and can anyone tell me what the difference is between the DCA-1622 and the PLX-1602? I see everyone on the Internet selling them for $599-600, but no other variation. I attribute this to probably some sort of pricing regulation by the manufacturer. Are these amps capable when compared to, say, and Adcom GFA-5500, Bryston 4B SST, or similar? Not experienced enough to be able to look at the specs and determine if the important variables are sufficient values or not for loudspeaker amplification in a HT setting. I have sent an email to QSC, but still waiting on a reply.