My experience with the PB13-UltraYesterday, I had the opportunity to listen to the SVS PB13-Ultra. Many thanks to htkaki who hooked me up with the owner and thanks also to the owner who graciously invited me for a listen.
The owner’s HT setup is in the living room and the PB13-Ultra was located in the front left corner of the room. Upon looking at the sub the first thing that strikes you is the size. It is huge! The unit came in rosenut finish, which is beautiful and classy.
The owner told me the sub’s gain was at the halfway mark and it was set about +3 dB hot compared the mains. Sub tuning was set at 15 Hz. Listening was done at -12 dB on the AVR’s master volume (louder than what I normally listen at) and demo movies were Kung Fu Panda, Iron Man and Pearl Harbour (all on DVD as the owner doesn’t have a BD player yet).
If I were to describe the PB13-Ultra in one word, it would be: POWERFUL. The sub is capable of massive output and big explosions would send tremors around the room. You could definitely feel the bass and on the right note it can hit you in the chest – I’ve heard this expression before but this is the first time I’ve actually experienced it! Loud scenes would result in the ceiling and windows rattling a bit. I pity the poor neighbours during the demo session

That said, I felt the bass to be overpowering at times. There was some boominess and this could muddle the bass definition a bit. Bass was not as tight or fast as I prefer (but still better than lower end ported subs). However, I think this is a room interaction issue and due to the high level the sub was playing at (the owner loves his bass). With a sub this powerful, I feel that room setup and acoustics is crucial as a sub like this can easily outperform the room. Don’t imagine you can just plonk this sub anywhere in your room and it will perform at its best. The thing is, this sub still hasn’t reached its full potential yet in the owner’s room. I believe htkaki will be coming in future to help the owner do some further fine tuning (hint: good opportunity to introduce the EQ1). Once fully optimized I believe the bass quality of the PB13-Ultra will be even better.
Next... how does it compare to my F15When it comes to output, there is no contest - the PB13-Ultra is capable of much more output than the F15. Play the PB13-Ultra loud and it can deliver very visceral bass. To come close to that (not equal) I had to set my sub trim about +9 dB hot, but if I keep that setting the F15 will run out of steam during the big scenes. So the F15 certainly does not have the headroom that the PB13-Ultra has. The F15 does have the edge when it comes to speed, articulation and tightness. This is probably due to its sealed nature.