Dual 15"" speaker systems have become one of the most popular configurations with DJs and musicians who are looking for more low-frequency performance while maintaining the simplicity of a single-box system. The JRX125 is actually a ""quasi three-way"" design. This means that the upper woofer covers lows and mids. The bottom woofer uses a lower crossover frequency and covers only lows, acting as a built-in subwoofer. So you get the extra low-end of a dual 15"" rig while maintaining the superior mid-frequency performance of a single driver system.FEATURES:[ Frequency Range (-10 dB): 36 Hz - 16 kHz [ Frequency Response (±3 dB): 45 Hz - 12 kHz [ Sensitivity (1w/1m): 100 dB SPL [ Nominal Impedance: 4 ohms [ Power Capacity: 500 watts [ Peak Power Capacity: 2000 watts [ Recommended Amplifier Power: 500 watts to 1000 watts into 4 ohms [ Maximum SPL: 133 dB [ Nominal Dispersion: 90º x 50º [ Crossover Frequency: 2 kHz [ Dimensions (H x W x D): 1099 mm x 464 mm x 432 mm, (43.25 in x 18.25 in x 17 in)[ Weight: 42.6 kg (94 lbs)[ High Frequency Driver: JBL 2412 1"" exit compression driver mounted on Progressive Transitionâ„¢Waveguide[ Low Frequency Driver: JBL M115-8A x 2[ Input Connectors: Neutrik Speakon NL-4 (x1); ¼"" TS phone jack (x1); parallel ";