Jolida integrated with remote and pre-outs?

Realremo - yes, that's exactly the way to do it if you want to use the high-level inputs on the sub and have only one set of speaker terminals. I used that kind of connection on an HSU sub, at HSU's recommendation, and am doing the same on a Mirage sub now.

As HSU explained it to me, with a powered sub all that's coming from the speaker terminal connections on the amp to the sub is frequency and amplitude information, very little current is actually moving through the cables and it has no effect on the signal going to the main speakers. They said, in fact, that you don't even need the same gauge or quality of speaker wires as are going from the amp to your main speakers.

On my amp with five-way binding posts I connected the main speaker cables with spades and used bananas plugged into the ends of the terminals for cables going to the sub. I tried the setup with both the high and low-level connections to the sub and found it much easier to integrate the sub using the high-level connections, even without the ability to high-pass the speakers.

Bob_reynolds, what about high-passing the speakers using the speaker terminals on the powered sub? If the sub has two pairs of terminals, the signal goes through these terminals and then out to the speakers - certainly some subs out there have active crossovers at the terminals going out to the speakers. Not all subs have low-level RCA outputs back to the amp. If I try to high-pass the speakers using these terminals, what powers the 2 speakers - the amp in the NAD or the amp in the powered sub? Are there any disadvantages in this technique?
Also - what do you think of HSU's line of subs? Do they have any that would fit your crossover criteria?

Bob - I like SVS because their crossover point is 80Hz going back to the amp. Other subs that I have looked at (Velodyne DEQ series, for example) crossover at 120Hz back to the amp. I want the 685s working as hard as possible, so I think a lower crossover point is more desirable...agree?
SVS does not show their frequency ranges like other sites, they don't use the typical "+/- 3dB" spec. Can you decode this graph they have on their site:
http://www.svsound.com/products/subs/pb10nsd/new_pb10nsd_FR_768.jpg
It seems to me that the SVS PB10-NBS produces deeper bass and is much heavier construction than other subs at the same price point.
Thanks! SVS should give you some free stuff, you are such a proponent of theirs on A-gon.