So far in testing the PB13 and the SB-13. The SB-13 is amazing! I listened to a JL e112 watching The Avengers, scrolled thru the movie for key action scenes at a local shop. The JL was really working. There's a part where Thor drops the hammer on Captain America. I wanted it to shake the earth but nothing. So I figured that part just may not have a lot of bass. Well watched it today with the SB-13 hooked up and realized that part was meant for bass. If I had the SB-13 and only the SB-13 I would have to say it is by far the best sealed subwoofer I've ever heard. It does have to work a bit but it does produce beyond what I thought it could. So after my flipping threw the movie a bit I decided to hook up the PB13. I ran the SB-13 at 0 and used the same set up for both on the processor. The PB13 was set to -7. It did not have to work at all to produce mega bass. When Thor dropped the hammer it felt like the air was being sucked out of the room. My wife and I are both agree that the PB13 has a feel of it sucking you into whatever you are watching and believe me, she really does not care about this stuff.