Home made absorption panels.....

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 .........

I suppose, that you could also cut up an old comforter and fasten the pieces to 1/4" 3x3 ft. pieces of plywood. I may try that.

Something else that comes to mind, would be a large plant at both ref. points. Of course, that would diffuse the sound rather than absorb it. I don`t suppose the diffusion would be as good as absorption. Just guessing.

Try the plants. Diffusion can work as effectively as absorption, IMO. You can also hang rugs or wall tapestries.

Take a look at the virtual system of Audiogon member "Perfectionist" to see what can be done with rugs.