[PDR]

So I've had room treatments from the sitting position and forward
for the last 18 months or so. My gear sounds very nice in here, but I
know I can make it sound even better by treating from the chair
back. The walls are for the most part bare, or cluttered with other audio
but there are some big areas that need help.
There are 2 dual 12" sealed subs in the back of the room.
The speakers are Super Vs, dipole, there is a QRD on front wall
between the speakers, absorption panel above it. The QRD is flanked with
2 larger panels 12" deep in the front corners. I have 2'x4' panels at first
reflection side points, and a 3'x5' panel on ceiling at first reflection point.
The panels are 4" deep with Roxul safe and sound.

So I would like to treat the rear of the room. On these sketches I have
drawn in where I think addition treatments should go~ the white panels with the squiggly lines.

What do you guys think I should use?
I'm thinking skyline diffusors on the very back wall on each side of the door and under
the short pony wall behind the chair. The rest should be more panels?

What would you guys do to finish this room?

Thanks,

Perry

[bpape]

The rear wall is somewhat problematic in that you'd like to get something pretty much centered behind you but the door kind of interferes with that (unless we can mount to it).

A combination of deep bass control and scattering/diffusion would be a nice choice back there.  I would avoid doing too many thin panels as shown in the sketches on the rear portion of the side walls. i would prefer to see mirror imaged pairs of diffusion on each side wall.

As always, there are 100 ways to skin the proverbial cat. This is just my opinion and preference.

Bryan

[jimbones]

What draw program do you use? I'd like to put some illustrations of my room up for comment/advice.

[youngho]

Not exactly what you're asking, but Linkwitz had some thoughts on dipole setup and room acoustics: http://www.linkwitzlab.com/rooms.htm#D

I wonder whether the QRDs in front might be more effectively used if placed more directly into each speaker's backwave. Also, depending on speaker toe-in, the front sidewall absorption panels may actually be close to the closest speaker's relative null axis, so it might be interesting to try using diffusion there (as suggested by Linkwitz and Bryan).

A degree of symmetry is generally desirable, so absorption on the front of the bar (at least 3-4" deep) and at least the lower part of the door wall (including the door itself) may be preferable to reduce the asymmetric first reflections of each speaker's front wave.

The diffusion in the back part of the room might be better off closer to the corners, though a portion of that sound energy would get lost down the stairwell (Skylines being 2D diffusers).

[PDR]

What draw program do you use? I'd like to put some illustrations of my room up for comment/advice.

Google sketch up..........wish I was better at using it.

[PDR]

Not exactly what you're asking, but Linkwitz had some thoughts on dipole setup and room acoustics: http://www.linkwitzlab.com/rooms.htm#D

I wonder whether the QRDs in front might be more effectively used if placed more directly into each speaker's backwave. Also, depending on speaker toe-in, the front sidewall absorption panels may actually be close to the closest speaker's relative null axis, so it might be interesting to try using diffusion there (as suggested by Linkwitz and Bryan).

A degree of symmetry is generally desirable, so absorption on the front of the bar (at least 3-4" deep) and at least the lower part of the door wall (including the door itself) may be preferable to reduce the asymmetric first reflections of each speaker's front wave.

The diffusion in the back part of the room might be better off closer to the corners, though a portion of that sound energy would get lost down the stairwell (Skylines being 2D diffusers).

I've been experimenting  with placement and toe in since posting my question.
Since the sketch I've reduce toe in quite a bit, maybe only 1//2" now.
I've also pushed the speakers back 6", and the chair maybe a foot.
I keep thinking I'm too close to the bar now, but the soundstage has improved.

I think I'm going to make six more panels and six skylines (styrofoam) and experiment
with placement over the coming winter months. Seems to be the best option.