The PE-304WU is a pendant speaker designed for the installations suspended from a ceiling. A directly-attached 5 m (16.4 ft) hanging wire allows the speaker to be suspended from high ceilings. The PE-304WU is driven on both high-impedance (100 V, 70 V and 25 V) and low-impedance (8 ?) lines. The input power (impedance) can be easily changed at the upper side of the speaker. The PE-304WU is certified to UL 1480 UUMW and ULC-S541 standards. Using the supplied GRIPPLE(R) hangers will facilitate the speaker mounting height adjustment.