I'm having trouble calibrating the multichannel input on my Yamaha RX-V2500, connected to a Pioneer 868AVi. When I use the player's test tones, the one for the LFE is unusually low. To make sure it wasn't a player problem, I switched the center and subwoofer connections, so that the center test tone went out the sub and vice versa. I noticed this when I played the fishtank-tapping scene on Finding Nemo. Using the player's digital out, the bass shook everything. Using the multichannel outs, it was merely a purr. I looked at all the menus and I don't think I'm missing anything.