Looking for reasonably priced sound diffusion.


I am looking for sound diffusion panels for placement on my ceiling. They need to be lightweight (no holes in the ceiling) effective and reasonably priced. No more then $80 panel or so for 2X2 feet. Like to actually spend less.

I have seen products by RPG - Skyline and Auralex - T-Fusers. The Skyline is to pricey. Not sure about those plastic looking T-Fusers.

I have good absorption and simply want to mix in a few diffusers on my ceiling and perhaps behind my speakers replacing absorption panels now there. The side walls and wall behind me have good absorption. I also have floor to ceiling bass traps behind the speakers in the corners of the room.

My sound is very good, but I feel this could be a nice final room touch. Perhaps helping out things when music is played very loudly which I like to do at times.

The room is 24 feet by 18 feet with 8 foot ceilings. You can see my room as part of my virtual system.

My speakers are out 7 feet from the front wall.

Thanks for your help.
128x128grannyring
Hi Bill here's what I did with my ceiling. Had an insulation contractor spray cellulose insulation about 1" thick: did the entire room ceiling + about 6" down the sidewalls from the top. This is the same process used to insulate industrial buildings, warehouses etc. The applicator nozel mixes a liquid latex adhesive with the fiber coming from the hopper via a high-RPM blower. The cellulose is highly pourous and randomly surfaced which is a highly effective solution for slap echo. The room remains slightly on the 'live' side which is exactly what I wanted. It didn't cost a lot either.
I had them use bleached white cellulose vs. the typical gray color found in warehouses. Dye can be mixed with the adhesive for other colors if desired. You have to cover or remove furnishings, and mask the walls and floor with plastic sheet and tape because the stuff sticks wherever it lands. Although if you want to have some corners or backwall areas covered, to whatever thicness desired, it is easily done while the crew is onsite.
I actually had my whole house done, not just the living-listening room area. It adds some R-value as a side benefit, and quiets the whole house too. Of couse your attic insulation can be agumented as well; this does not require the adhesive, they just blow it down to whetever specified thickness. And gray works there or even in the basement / crawl space too.
Go over to subwoofer-builder.com . They have an extensive article on DIY QRD and Skyline style diffusors. The Skyline styles are quite easy to DIY and will cost far less than your target price of $80 each.
I forgot to ad that pmerecords.com also has plan for a DIY Skyline QRD and a link to a calculator for specific freq designs. The calcultor is part of a larger site that also has calculators to design all the different diffuser styles.