Oh you're right Pioneer's standing wave attenuation only goes down to 63 Hz. I forgot about it, because I didn't like how it sounded, so I turned it off, and never looked back. The only settings I use are the channel trims, distance, and phase alignment. The EQ and standing wave (which is also an EQ) sounded too "processed".
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Pioneer VSX-1018AH-K, PDP-5020FD, DV-79AVi
Axiom M22s, VP150, QS8s
Sony PS3, surround backs
-Chris