...The subwoofers in the BP7006 towers are NOT the Supercube III subwoofers...Second, pairing the BP7006s subwoofers with the SVS is no simple task...
You have two good points there.
1) The BP7006 have less interior volume and power than the SC-3. The BP7006 will produce more bass than any speaker without a powered subwoofer. But the BP7006 (or any speaker w/ built-in powerd subwoofer) cannot match a dedicated powerful subwoofer in terms of bass output. My thoughts were too simplified.
2) Yes, mixing 3 subwoofers is very difficult. Again, my thoughts were obviously very simplified and not articulated with details.

I think subwoofer bass management is a lot simpler for Movie soundtracks than for Music listening. For Music, I was thinking of using the Pure Direct Mode, which would totally cut off the LFE/Subwoofer. All you will be using are two full range speakers. Only use the dedicated subwoofer for movies. That's how I set up my HT room. At first I was trying to use 3 subwoofers for music and movies. But as you have stated, it is extremely difficult.

So now I'm just using the dedicated Sub for movies.
I was reading an article in the latest Sound & Vision Magazine. They reviewed the (almost $4K) Outlaw Audio 5.1 Speaker System. Frequency response was like 90Hz-16kHz +/-4dB. At first I thought, "Man, those specs look like crap for a $4K speaker system!" But then I read the verdict: "Superb Multi-Channel Sound".
I thought, "Man, I guess you can just throw the specs right out the window!"
