Acoustic Panel Help

+1 for @larryi ‘s comment. I have a wall-hung plasma tv between my speakers (which are placed about 3 feet in front of the wall) and my imaging is precise with a great sense of 3-D instrument location. The tv does not seem to affect the imaging (the tv was not always there).

 @audiodidact 

I have a similar setup with 1.6's but with a little more room to the sides of a 50" plasma to the side walls which are at a 45 degree angle from the back wall. When I had a 24" CRT on a table in the middle I had very good sound staging. I tried absorptive panels on the back wall and it just killed everything so I put them at a first reflection point on one far sidewall. To my surprise, it tamed that 100 hz's or so bass node that Maggies seem to produce. When I put the plasma on the table about 2' from the back wall it kind of messed up the soundstage. When I hung it on the back wall I got 90% of the sound staging back compared to the CRT. Good enough. I write this because I've always wondered if diffusion on the back wall next to the plasma would improve the soundstage even more. I'll try to follow this thread and see what you learned.

Jim S.

I just saw this on Nextdoor before coming here:

https://www.slathub.com/

I have 1.7i's and have found in my room absorption on the front wall and diffusion on the back wall work well to maintain imaging while providing a sense of spaciousness. Maggie's radiate little to the sides, so I have found side wall reflections not to be a significant issue. YMMV.

@audiodidact:

I made the mistake of not looking at your Audiogon virtual system before suggesting the Vicoustic Multifusers. 3’ has long been considered the common wisdom for the minimum distance between planar loudspeakers and the wall behind them. Actually 5’ is much better, due to the speed of sound and the issue of the rear wave wall reflection arriving back at the planar panel and interacting with the panel’s front wave in a deleterious manner.

The rear wave should reach the listener’s ears at least 10ms (milliseconds) later than the front wave for those two sounds to be heard separately. Anything less, and the rear wave is instead perceived as a "smearing" of the front wave. Sound travels at approximately 1’ per ms, so a 5’ distance affords a 10ms delay between front and rear waves reaching the listener’s ears. 5ms from the rear wave to the wall, 5 more ms for the rear wave reflection to arrive back at the planar loudspeaker, thus a 10ms separation between the two at the listening position. Simple physics!

If at all possible, move your Maggies further away from the wall behind them. If you can, diffusion works great. If you can’t, perhaps absorption is the better choice.