Well after spending more time with my SB13 lot's of listening with material I know well, I will be sending it back to SVS for a PB13. I was holding out hope it would provide a satisfying experience in my large room, but it's lacking in the lower octave. This is certainly no knock against the SB13 -- I knew I was taking a gamble with SB13 given my room is 6,200ft^3. This is a wonderfully powerful, articulate, and dynamic subwoofer -- and should be considered by anyone who has the appropriate room or listening habits. However, in my large space it's an unbalanced presentation as above 50hz the SB13 is great -- below 50hz everything simply gets lost in my room.
Owned a rosenut BASH PB13 years ago -- will look forward to seeing the difference the PB13 will make -- especially in the movie department...
Music is enough for a lifetime, but a lifetime is not enough for music.
Time is a great teacher, but unfortunately it kills all its pupils.