MONITOR44TB BLACK HIGH QUALITY 5" 2WAY100V 4 OHM WITH HORN TWEETER RCF MONITOR 44Careful acoustic design and the use of advanced materials contribute to the exceptional music fidelity and speech intelligibility Bass driver: 5? high efficiency carbon fiber woofer Tweeter: CD horn loaded, 0. 5? dome Freq. Response (? 3 dB): 160Hz? 18kHz Rated Maximum SPL: 108 dB, @ 1m Constant Voltage: 25V, 50V, 70V, 100V and Bypass Power Taps: 1W, 5W, 10W, 20W, 30W and Bypass