Just finished building some acoustic sound absorbing panels for my desktop speakers, so thought I'd share some pictures. Panels were constructed from 1x2 strips and 1/8 flexible hardboard. Absorbing material is cotton fiber insulation (no itch, no outgassing), wrapped/stapled with fabric.
The panels did a nice job of helping tame a midbass ringing that I was getting from the wall behind the monitors.
Audio gear is a USB driven Wadia 151 PowerDAC mini with a pair of Dynaudio Excite x12 speakers. Really happy with how the sound turned out.
Edited by Sheldon N - 3/12/13 at 2:34pm