Michael Green Audio Pressure Zone Controllers

Michael Green's Pressure Zone Controllers are a highly effective way to treat rooms for optimal sonics. This sale includes 15 Mini Echo Controllers (originally priced at about $115 for the cherry version) and 4 mini corner controllers for treating ceiling corners (originally priced at about $90 for the cherry version), along with mounting hardware. The hardware is for mounting the 4 mini corner controllers and 4 of the Mini Echo Controllers in corners -- the rest mount simply to the wall with screws. These graced my audio room for 17 years, but we moved and I no longer need them. Dimensions and a highly informative article by Doug Blackburn of Soundstage are in the pictures.