What started out as a single SVS PB12+ has ended with DUAL PB12/2s. The second /2 arrived yesterday.
The original PB12+ is on its way back to SVS. It was a marvelous machine but I do believe, now that I have had two more SVS subs, that my unit was defective. I also think it may have been a bit undersized for my room size and construction. The issue I had with it is that it would bottom out on the lowest of low movie scenes, way before it probably should have. I will acknowledge that I may have driven it hard, relatively speaking, for the big room (+3500 cu. ft), but the gain never went anywhere near 1/2 way and I never saw a db of more than 100.
The PB12+ was finished in cherry, and it was fine furniture grade. After discussions online and with SVS, we decided to give a PB12/2 a shot. The first PB12/2 that arrived was much larger than the PB12+, and had a rosewood veneer finish. Strikingly beautiful! I definitely found it preferable to the cherry, which as my favorite of hardwoods, was gorgeous. They were obviously finished by someone who knew what they were doing as they had been rubbed to a perfect sheen.
I ran both subs in dual fashion for about a week and still the original sub would bottom, even after adjusting the gain down to run as a dual.
Yesterday a second PB12/2 arrived. The rosewood finish option is no longer available. This didn't surprise me - that rosewood veneer they used is expensive stuff, I'm a furniture builder, btw. Replaced by something called "rosenut", which appears to also be a member of the rosewood family, but not nearly as dramatic. Since my two PB12/2 units were shipped only 2 weeks apart, I noticed that the newest one had a new and improved shipping container - a box inside a box.
The timing of the delivery was perfect, my wife is out of town and the shipping boxes are already in the attic. She'll never notice.
I turned off the existing sub and calibrated the 2nd one to match the first, then turned both on and adjusted the input level to match the original SPL.
Then I listend to the test tones with both subs on and one sub sounded much louder than the other in my listening position, even though the SPL meter read them as identical. (subs are on opposite sides of the seating area, near the front/mains). So I used the individual gains to even them out - is this the right way to go about this? (I don't know). Also got a boost on the SPL from the phase adjustment knob - first time I ever noticed that. BTW, I chose the 16Hz tune for both subs.
I then started rocking and rolling! Woohoo! I couldn't, not a chance, possibly tolerate what these babies could do if I ran them to their potential. No way. Not a hint of effort from either of them. I threw everything I could their way, and with Mrs. Schwingding gone, I threw it even louder. When Superman's craft arrives in the first couple of chapters of "returns" I actually worried for the house a bit.
Threw in the Blue Man Group "Complex" DVD-A and jacked that up, too. Grins and more grins. Did the same with everything I could think of until I got a headache. Possibly the best demo I found is Dr. Chesky's 5.1 surround show "Organs and Chimes", it will knock your socks off.
Am I happy? You bet your butt! Will I be wondering if I made a good choice - nope.