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".
Pioneer PDP-5020FD, Marantz SR6011
Axiom M5HP, VP160HP, QS8
Sony PS4, surround backs