Room Treatment Reviews

Description: Floor-standing, active column for attenuating low-frequency resonances in listening rooms.
Dimensions: Column: 31" circumference (36.5" including base), 9.5" diameter (15" including base), 84" high; outboard power supply: 6.5" W by 2.25" H by 8.5" D, not including feet or rear-panel jacks.
Price: $2500/pair (1989); no longer available (2007). Approximate number of dealers: 60.
Manufacturer: Phantom Acoustics, distributed by InConcert, Auburn, CA (1989).