Thru Mode 50W, Transformer Taps at 30w, 15w, 7.5w 3.75w and 1.9w (70V),100V capable, 6.5″ woofer with 1″ VC, PP cone and rubber surround, 3/4″ soft dome tweeter; 4 kHz crossover frequency; Easy, attractive install; Ideal for high-intelligibility voice, music and signal reproduction in commercial, industrial and institutional applications. High-impact polystyrene with removable locking installation arms, back can of formed steel, conduit-capable clamp for wiring, wiring chamber with screw lock, perforated metal grille with inner fabric liner for “blackout”. The PHR 630 ceiling speakers are sold as pairs.