I want to add a sub to my B&W 600 setup:- DM 603 S3, LCR60 S3, DM601 S3.
My listening room is open to dinning room, overall it measures about 25' x 21' with 8' ceiling.

I got a good deal on PSB Subsonic 6 (not 6i). It is a ported design with 12 in driver, although its RMS power of 130 W seems a bit low on paper. Any opinions on this sub?

Thanks