Well I ordered my PB 13 Ultra today to replace my Klipsch sub 12. I am sure I will be blown away by the SVS. I do have to say I spoke to Ron for quite a while and he was a great guy to talk with and educated me on subwoofers. It should be here about Wednesday. I ordered the rosenut and Ron wants me to call him with my feedback when I have it set up. This has been a good company to deal with. I will keep you posted.