Originally Posted by keenly
It took a whole but I got the sound perfect on most music and movies...
...After much studying, the general consensus was bass can only sound better with corners filled, right?
Wrong. The objective of bass traps is to smooth the frequency response with the least possible intervention/cost, not to plaster over it with 'perfect' treatments. Optimization of bass traps to the level you are attempting can only be accomplished with manual acoustic measurements.
If you were dissatisfied enough with the sound to change the room treatments, maybe the sound was always a little 'broken', especially if you are not measuring but trying to optimize anyway. Odds are you initially had problems but made them worse.
Assuming that nothing substantially changed in the system except the bass traps, you can readily identify them as the culprit by restoring your prior room configuration and recalibrating.
If you live in the SF Bay Area and decide you need to recoup some of your investment in bass traps, message me please.
On Outkasts Stankonia 5.1 album, the track MS Jackson has some slap bass, I increased this before burning a disc.
If you felt the need to alter your recordings, that is a strong indication that you had pre-existing system issues before you added all those new bass traps, as is your naive approach to fixing it.
Also, if you are listening to hip-hop and related genres, the bass is more percussive than melodic as well as usually way over-boosted. You are going to have a really difficult time tuning your system with that sort of bass since it keeps repeating the same notes over and over rather than traversing the whole musical scale frequently, and the variety of bass instruments (drums etc) is small, with most of them synthetic and overly processed for effect.
Try the original recording, not your bass-boosted version. How does that sound?
Originally Posted by keenly
I then had to get rid of receiver due to problems with it responding to remote.
Did you duplicate your post-auto-cal manual crossovers and levels and polarities etc.? Everything identical? Based on your statements it seems like it. One step you might try is factory resetting the receiver, though I suspect you already did that too.
You might temporarily wire up your old receiver and see if the problem goes away. Still have the old receiver? Still calibrated? That might be easier than removing your new bass traps.
If that option is out, or seems too drastic/hassle-prone at this point, you can try to simplify the problem using your new receiver.
'Direct' mode with analog or stereo/mono input gets rid of all crossovers and EQ for you, as does 'pure' mode that also shuts off as much of the digital circuitry as possible (these sound modes might be called something else on a Marantz -- I have Onkyo).
If the sound of your bass-limited channels is similarly affected, your room treatments are probably at fault, though it is potentially difficult to tell without measurements confirming your perceptions since those speakers are not going to produce much bass alone.
Another potential investigation is to run the subwoofer full range and see how it sounds alone.
My room is 14ftL 9.8W 8H
Any discontinuous walls? Any subdivisions, louvered closets, etc? Open to kitchen, dining area, living room, hallway, etc? Irregularly shaped rooms can behave unpredictably and can also be difficult to tune when you change the acoustic treatments and/or speaker placements. Ask me how I know.