- What is the purpose of having that subtle backlighting/uplighting around and behind the screen?
Jason got it right, and it’s often called “bias lighting.”
- Do you leave that stuff on while watching a movie, or what?
I played around with some bias lighting when I hung our beloved 120” screen, but eventually concluded that it did not make a significant difference in our setup.
- If I had a pro do a built-in ent. unit in my media niche (or did it myself) and put my M60s in screened enclosures, how much is that going to degrade their sound?
I would say: To the extent that you won’t like the M60’s very much anymore.
- Anybody ever heard a sub playing from a screened enclosure?
As long as the enclosure is located where the sub works well for the room in the first place, I believe enclosing it won’t have too much adverse effects for bass frequencies.
- How much vertical clearance do QS8s top and bottom firing drivers need?
If it were me, I would give at least 6-8” but it might not be very critical.
- Using M2s or M3s as rear surrounds in 6.1 or 7.1, is it necessary to provide some space behind them to allow breathing room for their ports?
Definitely, even if the speakers are or front-ported or sealed. The larger the clearance behind the better they sound. I would say 3-4” absolute minimum.
