Supplemental LF for ceiling systems 
High-excursion woofer in ported enclosure for extended lows 
Low pass network with overload protection 
Integrated transformer for 70 V, 100 V, or 8 Ω use 
Front-panel mode/wattage selector 
Internally damped heavy-gauge steel enclosure 
Safe, easy installation with included tile bridge and mounting ring 
White semi-gloss perforated grille 
Complete package, requires no additional accessories