Summary: I recently picked up a pair of these brand new at a used price on EBay. Very much enjoying them. I'm using them as part of an active bi-amp setup. They're powering the mid+ribbon drivers of my Magnepan 3.6R speakers. (I have a pair of 1000ASP ICEPower modules on the bass panels.) These are an upgrade for me, from an Acoustic Reality eAR 502 dual mono block amp, which used the 500ASP ICEPower modules.