Just received my SVS pci/2531 and hooked it up and find that my Pioneer Elite VSX-45TX has a problem with the SUB Out on it. What happens is when I switch sources on the receiver it produces a loud bass pop out of the sub. Supposely there is a circuit or switch which is supposed to mute the sub signal when you change sources. So now my SVS is sitting in a corner all by its self for 2 weeks until I get my Pioneer back. Pretty bummed out I've been dying to see what all the fuss is about.