Possibly out of grief from departing with the twin JBL 2235's used in the sweetest sounding subwoofer I've yet owned. I recently bought a W15GTi off of eBay. Mk. I, because I prefer the dustcap. Assuming it gets to me in one piece, I'm going to use it as part of my home subwoofer system. I will build it into my TV stand, where it will supplement a corner-loaded pair of Peerless XLS12's in a PR alignment with the drivers push-pull on the front and back and the PR's opposing each other on either side. The XLS12's will each get their own NHT A1 monobloc, and I will likely order that Dayton 1000W/4ohm rackmount amp currently on sale tomorrow to drive the W15GTi.
I know how some people are running them, but what about the rest of you who are using this woofer?
I was thinking of doing a simple sealed box (120L) with high Qtc (about 0.65) sealed box with the Dayton amp's parametric EQ to bring it up to the low end and better match the extension of the XLS12 sub. At rated Xmax, which according to recent testing is pretty highly overstated, it will reach 104.5dB at 20Hz, or about a dB less than the twin XLS12 sub. But then I started playing with different ported alignments. According to Unibox that same 120L but tuned to 20Hz will give a whopping 112dB at 20Hz, without reaching rated xmax when driven with 1000W, and with an overall FR curve similar enough to the XLS12 sub's that the main differences will come from the room rather than the native response. (Regardless of how I use the sub, I will EQ the whole bass subsystem with a Velodyne SMS-1, which will force me to employ the 17Hz high pass needed to protect the XLS12's globally, negating the VLF advantage of a sealed enclosure.) Obviously, a larger, lower-Q vented enclosure would be better still, but bigger isn't an option. The PR's would add cost, but I'd partially offset that by going with a cheaper amp such as the Buttkicker class D model.
So now that I've done my share of thinking out loud, what do you think?