Of course fedex didn't show until 3:40pm, meaning I wasted a leave day--but no biggy.
Initial impressions are very positive. I'm just tweaking by ear right now, as my spl meter hasn't arrived yet, but I think I'm darn close. I'm integrating this sub into a 2 channel (no bass management) system, supplementing a pair of Harbeth 7ES-3 monitors (down 3dB @ 46Hz). I'm running the Harbeths full range, using only the low pass filter on the sub. The signal is run preamp level from the preamp loop on my amp. The sub flanks the left speaker, corner placement, about 18" from the backwall, and 8" from the side wall, angled slightly to match the speaker toe-in. The floor is concrete slab with carpet, and the sub is sitting on a 24" x 24" tile, on top of the carpet. Overall room is 18ftW x 36ftD x 8-12ft vaulted ceiling. The listening arear is 18ft x 16ft approx, and is part of a great room.
The PB12-NSD doesn't have all the crossover freq's marked (on the knob) on the new amp, but using Audioholics measurements from their review, I started at the 9 o'clock position on the crossover--which represents about a 50Hz XO. I started with the level at 10 o'clock. Phase was left on 0 degrees. I ended up bringing the XO down one "click" on the knob, and level has worked its way down to 2 clicks below the 9 o'clock position. I believe if I haven't "pegged it" I'm darn close, at least by ear. The sub is integrating very well, and is fast---and sounds GREAT. Just gives the illusion that the Harbeths are bigger, deeper speakers, disappearing completely, sonically. No bloat, over-hang or plumminess to the bass.
I thought my passive pre might create an issue with lack of output and 8 feet of IC to travel through, but it works just fine. BTW, the Blue Jeans LC1 analog cables are VERY nice---first time I ever tried them. Very good build quality, and thick yet very flexible. I wanted something nice, but not crazy expensive--the 8ft pair was $49.
So far, so good....