Most effective Room Treatment for slap echo, etc


I am unfamiliar with room treatments products to eliminate slap echo, and to improve focus and imaging. I have no space in my living room to place two upright book cases stuffed with books to dampen down the room. Therefore, need advice and suggestions for a simple and reasonably priced room treatment solution. A member recommended Auralex. I rent my space,so wall or ceiling panels must have easily removable adhesive and not strip paint or stucco off the walls. Thank you, Jim
sunnyjim
Just search the various audio forums for inbo on DIY treatments. Easy to make, and much cheaper than buying from a manufacturer.
If the treatment has wires for hanging, 3M removable hooks do great.Link [http://www.google.com/products/catalog?hl=en&sugexp=egsisas&xhr=t&q=3m+removable+hooks&cp=2&rlz=1B3MOZA_enUS325US326&um=1&ie=UTF-8&cid=5714062467531851914&ei=bM5KTY60MojDgQeyw6jVDw&sa=X&oi=product_catalog_result&ct=result&resnum=6&sqi=2&ved=0CEEQ8wIwBQ#]
I hung a woolen tapestry on the offending wall. The tapestry is no larger than about 3 feet on a side, and is spaced a couple inches from the wall.

The effect was dramatic and immediate. The room was harsh before but is now fairly good.

I'd like to replace the tapestry with a large, dense rug...maybe 6'x8' and put the tapestry behind/between my panels.

jdombrow has a good idea. DIY is easy and 'fun'. OC703 is one of the materials of choice. I'd secure the right fabric first, however, since most fabric stores do not carry sound-transparent cloth. You can buy '6-packs' of 1" or even 2" thickness in 2x4 sheets.
I went the auralex route and was not overly impressed by it. While it did produce results, you really needed a lot to equal some of the other items available (or even DIY). I did not glue mine to the wall, I glues a small strip of thin wood to the back of the auralex and hung them from this strip, which better allowed for playing around with placement.

Kal (above) thanks for those links.