Small room....treating 1st reflection points

Have had good luck using mattress pads I use polyfill over mattress
pad cover with wood frame and fabric.

I referenced the Nextacoustics site above and want to mention they use the exact same foam used in Auralex products. Pretty sure their web site mentions this and I can attest to this as I have products from both. Also, both companies are located on the north side of Indianapolis. I'm half tempted to go dumpster diving.

You're going to need broadband absorbers for your reflection points, and DEEP traps in your corners and rear wall. Foam won't do much of anything. Check out the GIK site for info. Lots of good info on the Gearslutz site too.

I would suggest Real Traps. They can be a bit pricier than some of the others mentioned here, a few of which I tried myself, but in the end the Real Traps are what stayed in my room. The Mini Traps or lower cost Bare Traps might work nicely for side, front, and/or rear walls, but if I were you I would start with bass traps in the corners behind the speakers to see how that improves things. Also, do not treat the rear and front walls simultaneously, one or the other. In a room your size I would not recommend any type of diffusion products. Nearfield listening may actually be your best bet and save you some money. That is what I did in a room your size.

I can definitely agree with Clio09. I recently added the Mondo Corner traps in my small room and am amazed at the improvement. Everything improved from soundstage to clarity to bass.