I mainly run sound at a club, we use Martin Audio WT3's for tops, have 4 of them, and 4 Martin Audio Ws2a's on the bottom. For live music they are excellent, but for when I DJ they are a little flat to my taste. I like the sound of the folded horn better since unfort, all the younger kids are into the hip hop BS that no one likes. And personally, I feel that the folded horns hit those lows better than front loaded subs.
I guess for me, it's just hard to find a sub that works really well in both situations. I love the sound of the TH-115's, but can't afford them on my salary as of right now. To me, when 4 are used, they hit fairly well with the kicks, and play smooth with the bass, but when DJing, they can play all the hip hop BS without sounding like they are breaking a sweat.
I guess that's really what i'm looking for, something that is like the best of both worlds. Do the QW218's fit that? I mean, my SP218 is nice for live music, but just doesn't seem to have the low end stuff for DJing, and that's set up at 42.5hz (18 BW dropoff)-80hz at a 12 BW dropoff, but it just doesn't seem to go that low. And this is set on a driverack PA.
And so we are clear, the club has its own system, and I have my own.