room setup

Robm, I didn't see anything suggesting that low frequencies are a problem. Nsgarch calculated that only higher frequencies than about 200 Hz would be affected. The issue, I believe, is potentially one of soundstage and a bit of higher end distortion if the same music is hitting your ears at different times. Of course, that always happens but it's best when controlled through good room design and speaker placement. It's one of the reasons first reflection points are often damped or diffused.

It is not an issue of low frequencies. It is only an issue of high mid and high frequencies. They have shorter wavelengths and bounce around, affecting the sound image that reaches our brains. Absorption of high frequency reflections is a good thing, to a point. Nobody likes an anechoic room, but too much reflection is a bad thing.

part 2

Ok ....everybody including me thought it would be reflective.After hitting my instrument ,it turned out to be ...absorbing the sound ,just lke a matress or bed would.It is therefore a huge issue with low frequencies ,because it acts like a bass trap + overall absorber...hope it helps....It is after all a big hollow box!!

Sorry, I did read the post backwards. It makes sense now. I'm with everyone else. A blanket works good (thick) for listening sessions. Although, I tend to accept the lack of soundstage in order to watch tv while listening sometimes.

In my old room (a dedicated LEDE room) I had some Infinity Prelude MTS set up and sounding amazing. The depth is something I'm still trying to acheive in my new room. Anyway, we decided to add a 36" Sony WEGA HDTV monitor to turn it into a theater. The monitor was placed between the speakers and the imaging went to hell. I tried experiments with draping a big heavy blanket over the monitor to try to get the imaging back and was only marginally successful. Then I had an idea to create a "stealth shroud" around the monitor. I took a pair of window screens that were close the the side dimensions of the monitor and glued Sonex foam to them. Then attached them to each other using some 3/8" dowels across the top of the monitor (turning it into a sort of cage around the monitor). I put a few Sonex panels on top of the dowels but left enough space on top and at the bottom of the screens so that air could still flow. This improved the imaging immensely. It wasn't quite like the monitor wasn't there but it was close.