AVS Special Member
Join Date: Dec 2005
Location: central Louisiana
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I just wanted to add my 2 cents. I have 5 new 2150s that I found a great deal on. I just sold my house and we are soon to begin building the new one. At the moment i'm only testing these in two channel. I've owned the 3677 and I absolutely love the speaker but these were just too great a deal to pass up.
As other have stated the midbass is lacking. I ran the same test tones I ran through my old 3677s and at 60hz the 3677 would shake the walls , these kinda sound weak. Well the drivers in the 3677 are much higher quality and even used cost too much as I just wanted to experiment. So I bought several used but in very good shape JBL m115-8a drivers like atomicmist used in the link earlier in the thread. I swapped all the 15s in the mains, So basically this gives you the bass cabinet of the JBL 3622/3722 only crossed at 500hz vs 1300hz or so.
The midbass is much better and although they don't slam as much as the 3677s it is very close. FWIW I had the JBL in my theater, outside in the middle of the room aiming into a sunroom, they slammed anywhere i put them. After I finish my theater the 2150s will be in a baffle wall and a proper room, I called QSC and their lead installer gave me a bunch of tips for setting up a screening room with these. The baffle should increase midbass even more so I'll test out with the stock drivers again. Anyway...just figured I'd add that.
As for the question about QSC stuffing. They take about 20x20 piece of insulation like r13 and staple in right around the driver but it almost surrounds the basket...arches toward the basket. The enclosure is built like a tank, quite a bit better than the JBL enclosure I must say. Althought he JBL was adequate, yet the JBL insulation that lined their cabinet was very thin, of course I upgraded it in my 3677s.
Last edited by cdy2179; 08-29-2014 at 02:04 PM.