I have several of these units and the price is per riser!
The Auralex SubDude II and HT platforms gives your subwoofer excellent acoustic isolation for great sound!
isolation platform for medium-to-large-sized subwoofers decouples subwoofer from the floor to reduce structural vibration and sound transmission to neighboring spaces decreases resonance and sound coloration for tighter, clearer bass velour-covered 3/4" MDF base over 1" isolation foam construction 18"W x 1-3/4"H x 22"D (HT model) 15"W x 1"H x 15"D (II model)
supports subwoofers up to 200 lbs.
This ad was originally posted on Canuck Audio Mart and the seller ships to Canada, and the United States.