JBL SRX725 Dual 15 in. High-Power Two-Way Loudspeaker, 1200W/2400W/4800W Power Rating, Frequency Range (-10 dB) 37 Hz – 20 kHz, Frequency Response (+/-3 dB) 53 Hz – 20 kHz, Crossover Frequency 1.2 kHz, 136 dB SPL peak Maximum, System Sensitivity (1w @ 1m) 99 dB SPL (passive mode), 75°x 50° coverage, UPC 050036902892, Light-weight and very high-power, Dual 380 mm (15 in.) Differential Drive low-frequency drivers for extended low-frequency output, 102 mm (4 in) voice-coil neodymium compression driver for high-power capacity and very lightweight, Bi-amplified or full-range passive operation.