SoundTube RS1201i-SuperT 12-Inch Pendant Subwoofer | Color: BlackThe RS1201i is a 12 inch open ceiling or surface mount subwoofer tuned for maximum output and performance across the operating bandwidth. By incorporating a 12 inch treated fiber cone woofer and a treated cloth surround in a tuned and ported enclosure, this speaker delivers maximum low frequency response (32 Hz 200 Hz, 10 dB, independently verified) and high SPL (113 dB). The SuperT is a special transformer that handles low subwoofer frequencies with