I have the JBL 3677 have arrived thread which had a few years ago. I loved them but the room in my Avatar was just too small for them. We sold that house in August and are currently building with and the theater in this one will have get the benefit of everything I've learned over the last 15 years.
So I began around September looking for deals on the the new theater, I planned on more 3677 or 4722, I'm not a JBL 8340a or 8330a fan (owned both) so I was and have gone Volt 10s for surrounds, it's not like the JBL surrrounds are timbre matched to the mains so no biggie. While searching I found 5 brand new QSC 2150 Digital Cinema speakers still sealed in the boxes on Ebay from a large storage buyout, I got them down to $440 each. I couldn't pass that up as they retail for $1200 each. I sold two and kept 3. The woofers don't have quite the midbass of the JBL, but close. Once in the baffle wall (they way they are intended) they should be equal of maybe more.
The mids and detail projection is insane and I still haven't heard them properly set up in a proper room.
I even have a new demo because of them. For those interested I'll share.
I was testing out the hiss on my Crown XLS amps vs the QSC 1644 on high sensitivity speakers which the 2150s are 101db.. (QSC DCA dominates the Crown XLS BTW) switching between amps and just happened to have Dumb and Dumber playing. The part with the guys in the "love motel" sitting in the hot tub was on. What caught my attention was the bubbles, and water... it consumed the room like a real hot tub was in the room, I was surrounded by water IN FREAKING TWO CHANNEL
.. NO SURROUNDS.. I was thinking .. WOW.. this is new... So I quickly hooked my Paradigms up... nothing... the bubble and water jet detail was barely there, and didn't bring attention to itself, the Volt 10s did better than the Paradigms but not close to the QSC. So now I have a new test with that scene... detail projection I call it