Update 171102
UPDATE 171102
Completed:
• Removed ceiling fan blades.
• Removed polysorbers from sidewall/ceiling corners flanking sweet spot.
• Reworked front corner bass traps. Removed diffusion grates, limp mass membranes and 6” of 8 lb./ft^3 and replaced with 8” of OC703. Once I complete the Superchunk bass traps, I’ll relocated all six of the reworked 8” bass traps to the ceiling/wall corners. Also, since I have a ton of 8 lb. Roxul and some OC703 scraps, I shredded them into fluff (<2 lb./ft^2) and mixed them 1:1 then put them into small garbage bag “cells” which I tacked behind the front corner traps. Putting them into cells prevents them from settling to the bottom which increases density and unbalances the trap. Depending on the feedback I get, I plan to put them behind the 8” traps when I put them up on the wall/ceiling corners.
• Took new REW measurements and uploaded to Google Drive (link below). These measurements I think are of decent quality. Also, I took all seven measurements (-L,-R,-LR,-S,-SL,-SR,-SLR).
• The results are a definite improvement but there is still are nulls at 100Hz, 3-6kHz and 13kHz.
• Regarding the high frequency nulls, I tried to move things around and put up some hard board and plywood here and there just to see if I could improve them but I didn’t really so I’m not sure what do to there.
• Regarding the sub, no matter where I placed it or set the crossover the results weren’t very good. It increased the reach towards 20Hz but exaggerated the null at 100Hz and also cut out a huge chunk all the way down to 60Hz. It seems there is no point using it until I add more trapping except to check the kick on EDM or whatever.
Galaxy 51 Acoustic Treatment – Google Drive
Planned:
• Remove limp mass membranes from rear traps and add additional OC703 to fit gap.
• Build floor to ceiling Superchunk traps in front corners. Someone suggested putting peg board on the front as a possibility. I’m thinking of taking some hardboard and drilling out holes in some type of pattern and putting in on the front of the Superchunks in the front corners.
• Move 6 reworked old bass traps to ceiling/wall corners.
• Build 2 additional framed 8” OC703 traps for back corner behind door where I can’t fit Superchunks.
• Upgrade RadioShack SPL meter and Behringer ECM8000 calibration mic.
• Retest room.
• Remove everything from room and do baseline characterization (this will take several days and take my studio off-line so I don’t know when I can get to this. All of the other stuff I can do in the margins so to speak).
• Solicit input for revisions.