Tell us about your acoustic treatments

• GIT soffit traps in rear corners
• ASC tower traps in front corners
• ASC half-rounds, GIK A6 Alpha panels, and one Vicoustic DC2 diffuser on front wall
• Vicoustic DC2 diffusers on side walls near the speakers (which have side-firing ambiance tweeters)
• ASC 2" panels on must of the remaining side wall area, along with some pictures & rugs
• RPG 2" BAD panels mounted to door (center of rear wall)
• ASC PCAD bass traps between those BAD panels and the GIK soffit traps on the rear wall
• ASC Cinema Panels on ceiling behind listening position.

The ASC items (except the Cinema Panels) and BAD panels were reused from a previous listening room.

@kgveteran : I did measure decay time, but I haven’t done it for a while. The main improvement that bass traps give, IMO, is reduction of bass decay time.

Dropbox link to early graph.

For me, it was “wow, this completely transformed the low end and was more than worth every dollar spent.” It made more difference to the sound in my old room than spending 3x the money on speakers. And the new room, being well sealed and in the basement, was a hopeless echo chamber without bass trapping.

And in cleaning up the low end, you should get far more clarity across the rest of the band.

For the low frequencies, I've used mainly absorptive bass traps. When I looked into tuned traps (GIK Scopus traps), I thought they were too difficult, as you have to get the frequency exactly right, and if that frequency is > 100 Hz, the traps are big and expensive. I understand that Vicoustic now has a tuned (resonator?) trap with a clever design to adjust the frequency by telescoping the trap. I have nether seen it nor tried it, nor do I have space in my room for one more thing (!), but it seems like a great idea. To deal with deep-bass problems much below 100 Hz, I use DSP.