18" compact subwoofer 350 watt (continuous), 1400 watt (peak) power capacity The rugged enclosure is constructed from 19 mm (3/4 in) MDF (Medium Density Fiberboard) using advanced adhesives and mechanical fastener technology for durability and improved low-frequency performance. The enclosure is covered in black carpet. A top mounted, cast aluminum 35 mm pole mount receptacle can receive an optional SS3BK pole to facilitate use of the JRX118SP as a base for a midhigh speaker cabinet. Non-resonant, all steel handles are used. Attractive 18-gauge perforated steel grille protects components from damage. 35 mm pole mount receptacle for use with satellite speakers. Specifications: Frequency Range (-10 dB): 38 Hz - 300 Hz Frequency Response (±3 dB): 55 Hz - 300 Hz Sensitivity : 96 dB SPL Nominal Impedance: 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): 23.5 in x 20.3 in x 22 in Weight: 71 lbs Low Frequency Driver: JBL 2043-G Input Connectors: Neutrik Speakon NL-4 (x2); 1/4" TS phone jack (x1); parallel