I owned both the 4429 and 4367, loved the 4429 and never became good friends with the 4367, way to detailed for me. Anyway I was looking for a pair of new or second hand 4429 as I really regret selling them, but could not find any, so I went to audition the 4349. The pair only had a few hours of playtime so wasn't expecting much but after 40 minutes of listening I ordered a pair, they just felt right for me, the 4349 had that extra woofer slam that the 4429 lacked, and a sweeter top.
How the sound signature has changed during the burn-in is insane, they went from a very sloppy bass and compressed top, to a very punchy and dynamic bass with a very wide and open top without any trace of sibilance. Imaging is exceptional good and soundstage is also pretty good, way better than you would expect from a studio monitor. They are powered by the Anthem STR pre & power combo, Chords clearway cables and an Auralic Altair G1 streamer. I usually have 10 things I hate about my new speakers, and ends up selling them again within a year or so (I only had the 4367 for 3 months), but I really can't find anything I dislike with 4349 so I almost sure that this is the last pair of speaker I will own.
One should note that this a studio monitor and very revealing, but not to the point where they get annoying with spiffy S and T sounds, but more like in a way where they pick the instruments apart and how they are "attacked" by the musicians showing all shortcomings and if the band is out of sync. Great bands sound great, and the bands you normally hear in your car and wonder why they never made the big scene, should stay in your car, they will sound awful with the 4349.
The finish compared to the JBL 4429 and especially the 4367, is immaculate, all lines match up perfectly and the black paint/oil treatment (don't know the English word for that) is also perfect including the sharp edges, where my 4367 had close to no color.
I'm thinking about swapping my Anthem set for a Luxman L-509X, anyone have experience with JBL horn and Luxman?, tried an Accuphase E-480 but didn't like the sound, to thin for my taste.