He's running a pair of Phase Linear 400s and a pair of Phase Linear 700s... 1970s vintage bulletproof stuff that will break your foot if you drop it. They can also double as welders.

http://www.phaselinearhistory.com/amplifiers.htm

With his old "non digital" pre 5.1/DTS preamp receiver, he could peg the VU meters, and guarantee that the cops would show up.