"But apparently rather expensive"??? Who said that?

Dr Toole and Weltis methods at Harmon International don't require expensive subs, it is about balancing out the frequency response in your room by placing them on opposite walls. Dr. Geddes has commented on how similar the two approaches are, I've read the thread.

For me it is about flat, powerful, non-distorted LFE at any levels. You can't get that with mediocre non DSP subs following this plan. Enjoy your GedLee approach.

M80s VP180 4xM22ow 4xM3ic EP600 2xEP350
AnthemAVM60 Outlaw7700 EmoA500 Epson5040UB FluanceRT85