Thanks go to Nick for having us over. Very gracious of you to host AND provide lunch. Your two subs frankensubs sounded good to me.
Here is my account of the gtg from my brief listening sessions. I spent a lot of the time trying to figure out REW and the MiniDSP in the adjacent room.
The first of the subs to be tested was the Submersive HP. As everyone had mentioned previously, this thing was a beast. We just plugged it in and let it rip. It is definitely one amazing sub. Being able to hear it was worth the trip.
Next up was my Revel B15a. Well, what can I say? How can any sub follow the Submersive and not sound anemic? I had no idea the how big the room is or else I wouldn't have bothered bringing the Revel. It had no chance of being effective in that size room. Another poster had mentioned that it did well with music and I will have to agree, but not was well as the Rythmic though.
Speaking of Rythmic, that was next in line. Much better than my Revel for HT use and possibly slightly better for music, but it was hard to tell given the difference in environments and the fact that the parametric EQ and phase is set to compliment the two other subs in my room. I still think the Rythmic is a better sub though. I bought the Revel before I knew anything about quality ID subs. I'm also going to agree with another poster in that the Rythmic had no chance of being effective in that ginormous space. It faired considerably better than my Revel, but still no match for the Submersive. Multiple Rythmics would be a pretty sweet setup.
Next sub isn't even worth mentioning. It was my JL Fathom 110 clone. Essentially, it's a JL 10w7 in a 1.25 ft^3 box sans the built in amp and EQ. Again, in my smallish room, a pair of them sound great and are quite impactful. In this setting, however, we couldn't even hear it. I was able to see the cone moving frantically, but it could barely muster a whisper in that room. Big fat FAIL!
Now onto the final sub. The LMS 5400 in a 3.5 ft^3 sealed box. First time around it was quite disappointing as there was no HPF to prevent bottoming out on the movie scenes so I had to keep the LG clone's gain at just below the halfway point. Once we figured out how to setup the MiniDSP as a HPF at 10Hz I was able to crank up the LG gain. Since we had two of them we plugged both in for some fun. Interesting enough, from my seat adjacent the sub less than a foot away, I couldn't feel the pressures others were commenting about, but I could feel the walls flexing slightly.
It was nice to be able to hear all the different subs all in one place.
Warning: techy, anal me rant coming up.
I just wished there was more time and we could have been more methodical in our approach. It would have been nice to in the very least level match all the subs for a better comparison. Proper placement (or even same placement) would have been good and even better if we could have EQ'd them. In the very least, we could have EQ'd with Audyssey. Taking some measurements would have been nice too.
All that being said, I think we were all having too much fun to even care much anyhow. I know I had a blast listening and getting to chat with you all face to face. The measuring and more scientific approach would have been the icing on this scrumptious cake. It was well worth moving over five hundred pounds worth of subs four times in one day. My back thinks otherwise though.
Thanks again Nick and everyone involved.
Eric, I will be stopping by to hear what two LGs and four LMS's sound like once you get the second LG. Oh, and you owe me a demo of the car.
. Plus the funds if I sell my quad ex's. 2k easily 
