The 4367's are sounding really good. I'd say the break in time is pretty long, now the horns are so good, highs are pristine and a delight to listen to, vocals are excellent, especially on good recordings, the bass is nicely flat and detailed, still not extended like the 52 was. When I say flat regarding bass, it still sounds like more of a live bass but it's accurate to the recording.

The sound is tough to describe with a string of adjectives, I don't know how reviewers don't keep from sounding like they are writing the same thing all the time. The 4367's just sound right, I find myself gravitating to acoustic Jazz a lot now because I get such a kick out of the liveliness, the cymbals, realism of the snare, tonally the brass sounds really good. Like a good speaker they sound good on most genres.

I'm thinking of trying these iso stands that will get them up from the floor about 5 more inches. They're supposed to improve sound as well but I'll have to see how much they cost and it's difficult to imagine the 4367 sounding better.

I feel like I've rambled and somehow missed my point, the 4367 I liked when I first got them but the sound has really improved upon break in. I used to wonder if I'd like Revel's Studio's better but now I don't think I could live without what the 4367 does. If you've never had the chance to hear a real pro horn with high quality compression driver you don't know what you're missing. Typically, JBL is shown with Levinson at Axpona, so many get a taste but I've noticed they tend to bring a model that's really too much for the room and I wonder if the heavy bass is what draws the attention. OK, enough,