Here is what I got back from SVS



" All things considered, I think the PB12-isd/2 will be just what you are looking for here. In 25hz mode…it will extend almost as deeply as the 25-31PCi(22hz) you have now…and it will provide 6-8dB more clean output. (or, almost the same as 2.5 to 3 25-31PCi subs..:) In 20hz mode, it will extend a little lower, and still have a 4-6dB advantage in output capabilities...:)"


I was suprised to see it would take 2.5-3 25pcis to get the output of a single PB12-isd/2.

My Home Theater