isolating alcove without adding walls...-Acoustics Forum-Acoustic Fields Forum

just some more info on the room…

I have two sets of near-field monitor/sub combos in the room that I do not believe are overpowering the space.

1) Yamaha NS10M/Yamaha A100A stereo amp, Yamaha NS-W2 (active) subwoofer all routed through an Ashly XR1001 crossover.
2) Tannoy PBM 6.5/Samson Servo 550 stereo amp, Tannoy TS10 (active) subwoofer all routed through an Ashly XR1001 crossover.

The rectangular part of the room is 14’10” (L) x 13’7″ (W) x 7′ (H – drop ceiling)/ 7’9″ (H – truss subfloor)

I hope that give enough info for some basic recommendations on dealing with that alcove, so I can square up the main listening area.

Thanks again,
John

Hi,

Here is an interesting paper on “Low frequency sound propagation in activated carbon” – https://usir.salford.ac.uk/id/…..1239_1.pdf

I have a question about using a suspended ceiling and the above truss subfloor as a massive bass trap for treating a smaller room with a low ceiling… can it be done?

John

Hi,

Would it be better to just rip out the drop ceiling and install drywall (or something better) directly to the truss subfloor… thus making an new ceiling that would be approx. 7’10” high? Would that little bit of difference, from 7′ (to the drop ceiling) to a possible 7’10” ceiling (mounted directly to above subfloor directly) worth the effort. (I’m trying to get myself to a better room size before I go crazy with room treatment.)

Also, with respect to activated carbon… is there such a thing as “audio grade” that can be purchased on the open market? I watched one of your videos and some guy treating a really small mix room by building his own low frequency boxes… and he used activated carbon that looked to be pellet size. Was that purchased from you? I am open to building my own low frequency boxes once I get the room size issue addressed to the best dimensions I can take it.

(another question… is it possible to use an alcove that is partially partitioned off as a large bass trap? …basically the idea is to suck out the low frequency room issues I am expecting? You mentioned in one of your videos that having an open door could really let out a lot a sound pressure…. what if that alcove space was used to house a massive low frequency box? – not sure if that question even makes sense, but it was a thought I was having. lol)

John

I will try the DIY/DBA once I have measured the room. In anticipation of some big low freq. absorption cabs, I have been clearing out some old gear from room along the wall perimeter all around. Literally whittling things down in the room to just my control desk/speakers/equipment rack/one amp and my drum kit in the back half of the room.

I have a ceiling height question….. In my room, where I have the drop ceiling height located at 7′-0″ feet, is that the ceiling height that I should use when considering room acoustics? or should I think of the ceiling height as being realistically located above the drop ceiling, at the truss/subfloor level above it? (…which is about 8′-6″) It seems to me that the drop ceiling might almost be non-existent to the low frequencies issues I am expecting. Just trying to theorize how I might be able to use the drop ceiling to some advantage during the treatment phase, and possibly add some isolation to the truss/subfloor at the same time.

Thanks,
John