How can you compare the Plus to Maestro..., not in the same price range, but I would agree with the latest statement, I have read a few people had them, and stated they were a very clean sub.. but no slouch either... Maximum output at 20 Hz: 107.8 dB < 10% THD But the New upcoming Plus lineup with likely have amazing SQ, if not better then the Maestro.
This is old, but I found this
http://www.audioc.com/speakers1/maestro/reviews/craigchase.htm
I have owned the PB12-Plus, and it had plenty of output for movies, but I would state that I wasn't thrilled with the SQ, but I have to also state my tastes have grown towards craving tighter, cleaner bass. The PB12-Plus was replaced with a Fathom F112
I must also disclose I have 2 - SVS PB12 Plus/2' and a SB12-Plus in my house.
I think the Maestro for $800.00 is a pretty good deal, and might offer better SQ then this version of the PB12-Plus, but I doubt it will sound better then the upcoming preorder Plus...
Are you looking to upgrade your subwoofer?
What is your room size, related equipment list, budget for a sub?
Are you looking for Sealed or Ported ---- % of Music/HT