Home made absorption panels.....

Glitch, a couple months ago I took down my wall mounted bookcases so my friend could paint the walls for me while I was at work. I was shocked how much echo there was without them on the walls.

I did the exact thing Tvad suggested and covered the panels with a natural white needled cotton fabric at Wallmart, works good and looks good also.

My solution was similar to Tvad's but I used a heavy cotton cloth which my grandson and I painted. It was a nice project for him. We spent an entire day buying the material, building and then painting the panels. They have his signature.

A cheap method to help with boomy base is to take a few of those corrugated cardboard boxes from your local grocery store (in particular the ones with those 1-2" holes along the sides) and stuff them with pink insulation material. You can then put one upside down box into the other, effectively making a cube, or leave them open on top. Wrapping them in a soft cloth will also help with aesthetics. Unless you find the "Chicita" logo appealing.

These will work well, placing 2 behind the speakers in each corner and two behind the listening position in each of the rear corners if needed.

Heck, I have an IKEA couch wich has these huge, plushy pillows covered in some type of denim that has also worked well (well, well enough) when I was trying to convince my wife and daughter that audio can be fun .........