I wonder how the CBM-340SE compares to the CBM-170SE as the 170SE apparently still uses the recessed tweeter from the original 170 (which with 4 boys around and these going in the "family" room was an important consideration).
Fustratingly there isn't a single professional review of the 170SE.
From my chats with Dave F., the goal for the 340SE was to be sonic match to the 170SE, but with higher output capability (for use in larger rooms, etc.).
I also find the dearth of recent professional reviews of Ascend's products rather odd, but what it shows is their popularity is almost
entirely word-of-mouth, which is a good sign. Also, considering the careful attention to testing/QA that Ascend gives every unit that leaves their warehouse, I'm not sure a higher volume of sales is really something they're looking for.