I run a second Nad 2200 for the sub that sits behind the couch. Sub consists of two 8 in. daytons in a 1 cu. ft. per/chamber ported industrial board box. The Nad could destroy the two 8's. My plan is to have my oldest brother (carpenter) build me a specialized box that will house eight 8 in daytons. It'll be a chore getting the impedance right. The nad will handle 4 ohm loads as long as one does not attempt to bridge. I have played around with car amps via pyramid PSU (56amp) (electronic crossover) into other drivers. The PSU doesnt seem to provide for dynamic transients so well. The lights in the house will dim quite dramatically when powering two car amps for example. Running older Proton amp, which is a relative of Nad. Also, a california series 300 wpc amp.