By the way, I recently ready this (written by the guy who designed the J L Audio CR-1, among other things, as I understand it) about the correct way to actually implement subwoofers, and found it totally fascinating and useful, just thought others might be interested - All About Subs Whitepaper. Particularly found the part about phase, and needing more than just a simple +/- switch to do the job properly very useful, as is the part about ported mains/subs...

HC: 861v4/ID40/LPS, DSP5000, DSP5000VC, DSP3100, SW1600, HD621, Oppo BDP-105, Sony VPL-HW55ES
2-Channel: Oppo BDP-105, TEAC VRDS-7/Trichord Clock 3/PSU, 551, Quad 303, Harbeth Compact 7ES-3, Kimber cables, Russ Andrews mains and supports.
Previous Meridian: 5000C, 5200SL, 7200.2, 6000, 562V.2, 568.2mm, 800v4, 808.2i, 818v2/v3, 861v8, 502