Dealing with a large TV between speakers


Thought I'd post this since it's a glaring problem (somewhat literally, very figuratively). I've got a 50" rear projection LCD TV between my speakers that has to be there for many reasons (HT/living room/etc). Soundstaging on the x and y planes seems OK, perhaps a little narrow, but forget about the Z plane. All the action seems to take place horizontally between speakers, with vocals perhaps a bit projected forward.

I've done the Master Set method on my speakers. They are ~3ft from the rear wall and about 7.5' apart (measured from drivers) . The TV is about 20" out from the rear wall and 4.5' wide. There is roughly 18" between the speakers and the sides of the TV.

For a better visual, I've created a drawing here that I've used for submission to various acoustic panel websites.

As you can see, speakers and TV are along the long wall, and I only have about 12' total between that wall and the wall behind me. I can't move the speakers out too much more, and based on Master Set and the rule of thirds, they seem to be where they should and they do sound good there (no bass bloat, clear imaging, etc). There is roughly 2' of space between the rear wall and my head.

What I've done so far for treatment are the acoustic and diffusion panels you see in the picture, and I've wrapped thick round foam pipe insulation (the tubes you can buy at Home Depot) vertically along the sides of the TV, which seems to help. I've also experimented with hanging a diffusion panel or light foam panels over the front of the TV to cover the front. However, I'm not noticing much of a difference with the front of the TV treated or not, surprisingly (I assumed that there would be more glare and smearing with such a large, untreated, reflective surface between the speakers and directly in front of me).

Outside of throwing a blanket over the TV (which I tried, didn't really work) do you see any way to accomplish more depth to the soundstage? Questions and comments welcome, but keep in mind, I can't move the TV.
tholt
04-24-10: Rrog
Tholt, I wonder if two 2x4 panels are sufficient behind your head. Two more might be better.

I've wondered the same thing. Will likely add 2 more panels in the near future.
With the absence of the TV, the soundstage was hovering in space between and behind the speakers, and thus seemed to be more holographic and go deeper...Also, the removal of the TV alleviated some frequency glare in the midrange.

This was my experience exactly.

And being a true and crazy audiophile, yesterday I went down to Best Buy and bought a flat panel plasma to hang on the wall. This despite my current TV working perfectly fine.

Yes, that was crazy. And it is exactly what I would have done. :)
From a 36 XBR to a 40" LCD to a 100" projection screen. Each step improved the depth of soundstage. Now I wonder if I should have a curtain to draw over the screen when I'm listening to music, because the screen is a large reflective area.

db