I have a few words to describe the new SVS PB1-ISD boxed sub...BANG, POW, BOOM and WOW! After calling SVS and talking to Eric, we set mine up together and I'm thrilled. It rocks da howse! The PB1 is adding support to my 16-46 PCi. After I turned off my PCi, I realized I could probably stand on the box alone (sans 16-46). Bigger than I thought. I can use it as an end table which takes care of many problems, but not too big that it is noticable. Ron and the crew have done a wonderful job.