What are the best Room Accustic Treaments members have found?

A tip of the hat 🎩 to Acoustic Revive’s QR-8 Quartz Crystals. From the Acoustic Revive web page,


Principle & Structure

Quartz Resonator QR-8 is not magic or occult. Reason why the sound improves by using QR-8 is that because, by placing QR-8 onto an agenda which causes resonance, the resonance frequency of agenda changes and it stops any resonation. Agenda such as plug, connector, parts, equipment switch, equipment housing, and door in the room, windows, wall, floor and ceiling resonates by its particular resonance frequency and by placing QR-8 will change the frequency and stops the resonance. But placing QR-8 to an agenda which does not resonate, adversely QR-8 may cause it to resonate or to over dump. So you have to be careful where you place the QR-8. You can check if QR-8 is causing the agenda to resonate or over dumping by listening to the sound.

At first, place the QR-8 lightly onto the agenda which seems to resonate. If the sound improves, it means that QR-8 has stop resonation. If the sound improves, place the QR-8 firmly for a rigid placement. In other wise if the sound deteriorates, take off the QR-8 and try it onto other agenda. The QR-8`s adhesive power will last for a wile, but if the adhesive sheet starts to lose the power, use the replacement adhesive sheet. Finding the best effect carefully is the most important thing.

GIK Acoustics Soffit traps dramatically improved the bass in my room by adding punch and enhanced definition.

GIK is the best! The free consultation is very helpful. 

Don't believe anyone who says that something thinner than a GIK panel can treat your room. It can't. It's physics.

+1 on GIK.

Jim Smith's "Getting Better Sound" is a handy reference for room optimization.

I've been working on The Room for the last year or so, I found a set of eight Aurelex 2' x 2' foam studio panels on line, made some cheap stands/frames to hold them up, got four concrete forming tubes, and moved these around the room to figure out what should go where, before buying from GIK. 

One problem I am not yet sure how best to solve is my front wall has a 6' x 6' window.  Initially I put up huge heavy drapes, which made for a nice dark background (both acoustically and visually), but as time went on I realized I missed the light, and also when I opened the drapes but left the blinds closed, it seemed to make for bigger sound stage.  And after 1.5 years, I realized that the drapes are fugly.  So I plan to buy some cellular shades plus a textured wood blind that will raise/lower over the blinds, hopefully have the choice and best of both worlds.  Might be TMI, but that's my room story so far.  Oh, and I dumped the rack in the front of the room, that was an instant improvement, probs bc it was Ikea.

If aesthetics are not a priority and you can live with the look of unfinished foam this is an inexpensive possibility:
http://www.nextacoustics.com/