Originally Posted by toofast68
Looks like you got a 60Hz hum. Personally, I can't stand that. (My wife was amused/sympathetic when I pointed out a hum in our "theater" that is clearly audible to both of us when the stereo was turned OFF
. Gotta figure that out.)
In terms of panels, I did some DIY using the information from here
that passes a modicum of design sensibility. Similar techniques may be used to improve the appearance of corner traps.
Some of the panels from that thread are pretty amazing: Bond posters, show posters, etc. Comix panels would be neat. Imagine a '60s Bat-Man POW poster/acoustic panel
IIUC, the panels will help smooth the decay so that ringing is reduced and your bass will be tighter, although some think it ends up being too lean for movies.