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Thanks for all your help, but a few more questions

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Vinyljunkie100

In Reply to: RE: Treatment for rear wall behind speakers posted by unclestu52 on November 06, 2007 at 11:03:13

I will do some more experimenting with door between left speaker open as you suggested. I guess I could just pull out french door and leave open. I hestitate to leave closet open as vibrations seem to effect equipment, although I will even try that (maybe just for a minute though).

I experimented with putting a sound plank between amps. It did bring central image into focus, but also seemed to pull in other instruments making soundstage smaller. It was similar to when I change from vinyl to cd (soundstage only, not commenting on sound of the 2 sources). I tried it back and forth over several songs. At first it was weird looking at the plank between speakers so I closed my eyes and just listened. I don't know if it was that I'm already listening at near nearfield position, so compression of soundstage, might have been overemphasized. Anyway, ultimately I liked it better closer to rear wall.

As for my original question do you know of a good material to cover whole wall? I don't think the drape thing would work with the 3 doors there. And if I removed drywall (would probably do a couple feet of adjacent walls also) could I get rid of tube traps and only have the wall a rear treatment.

Thanks again for all your help!
James Locke

Follow Ups:

a few more questions - unclestu52 13:59:38 11/07/07 (1)
If you like the strong central focus but feel the soundstage has shrunk you could compensate by setting the speakers a little more forward facing, with a little less toe in, or perhaps spacing the speakers farther apart. It also helps to play with the forward and backward position of the plank.

If you have the space, and since you have two extra planks, setting them up in a V formation with the point towards you also works very well and the angle of the V will determine the sound stage width.
I don't know if there is enough space between your amps though, although placing the set up slightly behind the plane of the speakers is also very helpful.

As for the wall covering, I believe what you really need is cut the reflective surface. The glass and the solid closet doors are the most obvious sources. The upper corner of the room is also a culprit, where the ceiling line meets the walls. The major issue in most rooms is the corners where the two walls and the ceiling meet.

Most often is you simply talk out loudly you will hear an echo as you approach those corners (you can clap your hands too as a test). Almost invariably I hear a slight echo when speaking into the corners and it is important to dampen those areas where the echos propagate.

My philosophy, to keep peace in the family, has been to use minimal treatment as usually bits of foam and other acoustical treatments do not go over well with the wife. As I earlier recommended before drywalling the corner, simply elevate the tube traps, and if that helps. you are on your way to a simpler, and more inconspicuous solution.

I doubt if you will hear much echo in the center of the back wall, but if you do you could drywall in a angled strip across the room, beveling the 90 degree interface between the wall and the ceiling.

Stu
- That's exactly how I set up the sound planks - Vinyljunkie100 14:13:36 11/07/07 (0)
  I simply placed a piece of painters tape to join one end bwetween planks and spead them about 6 inches apart at bottom.
  
  I experimented more today. I also put tube traps on 2 milk crates a piece to raise them up as you suggested. I heard a def improvement and will make some diy corner tunes asap. Should I do all 4 corners, or will the 2 suffice?
  
  I also did some listening with doors open again. While it improved my problem the bass wass uneven and pretty much gone.
  
  Maybe it wasn't overall soundstage shrinkage as much as it pulled all instruments to center equipment. I like the vocals better when I really had it cranked, but seemed to get in way a more realistic listening levels.
  
  Leaning towards changing walls right now as many have suggested.
  
  Thanks for all your help,
  James locke

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