Room treatments without $$$

Quilts and rugs hung on the walls at the first reflection points are a cheap and easy was to begin treating the room.
Have someone sit in the primary listening location, take a mirror to the side walls opposite each speaker and move it until the seated person can see the speaker reflected in the mirror. These are your first reflection points. Start from there.

Use the ideas from above, then go to Guitar Center and buy Auralex panels - 2 x 4 - $18, corner bass traps, $25 - ask for a discount. If they were marketed by / for audiophools, they'd cost 10x more $. Available in a lot of colors too - go to Auralex.com.

Find optimum placement for speakers.

DIY acoustic panels. Go to Home Depot and buy some 1x3 wood and make a frame 16"x48" and get some Roxul fiberglass insulation and fill er up.

Buy some cloth and staple it together.

Total cost: $12 each panel.

Works darn good.

Cheers

Go to the resource section on our site. It has lots of DIY links for acoustical treatment devices. It also has links to many articles on the web and books that may help you as well. The most important aspect is getting the size right--size matters, but it's the ratios of dimensions and what you do within that space that really counts.

Here's a link to our resources:
Rives Audio Resources