The specs for the M22 are -3dB for the bookshelf and in/on wall at 60hz, 70 Hz for the full in wall and full on wall. To me that means the cab volumes are bigger, but what I was really saying (or trying to) is that the in-on walls have a bit more depth than the full in-walls. Cosmetics might outweigh that fact, but thought I'd point it out in case it helps make a decision.

Cheers,

Dan
On-Wall M5HP LCR, QS8 & EP500 in 7.1