Bloated is perhaps the wrong word. I feel the transient response is not there at the start of each note and at the end. I don't have this problem with the Sony or the 350v3. I've often thought of stuffing the box with polyfill to dampen the response but have never gotten around to it. This would sacrifice some of the low end but should "tighten" the sound (at least it did with the Sony).

Rick, was this the first time you heard a 600?

Gotta go now. Veal shanks are awaiting for my Osso Buco.

House of the Rising Sone
Out in the mid or far field
Dedicated mid-woofers are over-rated