General - Do It Yourself Bass Traps

I've been looking for a way to build my own movable bass traps to make the mixes in my room a bit better. I'm hoping to be able to build these for about 1/4 of the price that it would take to buy bass traps for the control room. Grab some adhesive and put some half-pipes up on the corners to help absorb the sound. We'll see if it works.