| The JRX118S is driven by a massive JBL 18" woofer with a cast frame and 3" voice-coil. It's rated at 350 watts (continuous) and 1400 watts (peak) - and that's based on JBL Professional's 100 hour torture test.
Specifications
Frequency Range (-10 dB): 38 Hz - 300 Hz
Frequency Response (±3 dB): 55 Hz - 300 Hz
Sensitivity : 96 dB SPL
Nominal Impedence: 4 ohms
*Power Capacity: 350 watts
*Peak Power Capacity: 1400 watts
Recommended Amplifier Power: 350 watts to 700 watts into 4 ohms
Recommended Crossover Settings: 30 Hz HPF, 24 dB / octave; 80 - 100 Hz LPF, 24 dB / octave
Maximum SPL: 127 dB
Dimensions (H x W x D): 597 mm x 516 mm x 559 mm
(23.5 in x 20.3 in x 22 in)
Weight: 32.2 kg (71 lbs)
Low Frequency Driver: JBL 2043-G
Input Connectors: Neutrik® Speakon® NL-4 (x2); ¼" TS phone jack (x1); parallel | 
