Just wanted to post here a little about my dual XV-15's I got about a month ago now which replaced an Epik Phoenix. I was a bit worried I would miss that 18" Epik powerhouse, but decided on going duals after learning about the benefits of multiple subwoofers. I needed duals that would dig deep and belt out the SPL AND would pass the WAF. I decided on the XV-15's since they fit the bill and the fact that they are down firing and flexible as far as placement. Also, my wife would be able to put some of her crap on them and would kinda look like an end table or the like. Well, to my surprise after I got them placed in the room and she did a bit of decorating, she said "these look better than I thought!!" That made it easier for me and NO flack from the wife! So, on to the performance. After getting them dialed in with XT32 and several different listening sessions, I am very very happy and do not miss the Epik one bit!! In my room the XV-15's are solid to 14hz or 15hz just like advertised. Dual subs do really smooth out the bass and hit with some serious slam. I highly recommended these for high performance for the money. Great return on investment!! Kudos to PSA for a great product and great customer service, thanks!