After doing some quick searches, I'm finding these amps are quite a bit more expensive than the plate amps, but they also have much better specs. I guess you get what you pay for. The only thing I don't like about these amps is the fact they're located in the entertainment rack with the other HT equipment, which means having to run long sections of large gauge speaker wire to the sub. This wire also is very expensive. That's what's so nice about the plate amps. They're directly mounted to the sub, eliminating the need to run long, expensive amounts of speaker wire. Doesn't anybody make high quality plate amps?