My new PC12-Plus arrived last night from UPS. At first I was concerned that they sent the wrong sub (I too noticed the 20-39 PC-Plus box). The box looked a little beat up. Apparently, the delivery guy had the thing in his truck all day and decided to deliver to my house last (lucky me). He was curious and was wondering what it was. I told him it was a subwoofer from a very reputable on-line company (SVS) and I recommended that he get one after he told me that he was looking for something to replace his 15 inch subwoofer that he obviously wasn't satisfied with. He seemed very interested.
Anyway, luckily, the sub was packed quite well and looked fine upon inspection. Got it hooked up fairly quickly and demo'd a few Blu-Rays (Batman Begins, Transformers, Incredible Hulk) without configuring much other than the basic settings. Right out of the box this thing sounds a lot better than my previous sub, SVS 20-39PC, which broke down and started rattling after 7 years. Bass is deep and clean. Not boomy and very tight sounding. This is a pretty big upgrade for me as far as the built-in amplifier is concerned. The 20-39PC only had a 190 watt built-in amp. The difference in power with the new 525 watt amp along with the new driver is definitelly noticeable. Build quality, of course, is top notch. I'm sure some break-in time will still be required. So, I'll do some more configuring later and demo some more Blu-Rays. So far though, I'm impressed.