JBL's ASB6128 is a front-loaded, high power subwoofer system with a vented configuration for extended bandwidth and high output. It's comprised of two 460 mm (18") SVG Super Vented Gap low frequency drivers. Applications Performing arts facilities Theatrical sound design Auditoriums Houses of worship Live clubs Dance clubs Sport facilities Themed entertainment venues Features: Large vent area for high output Parallel / Discrete switchable Specifications Frequency Range: 28 Hz - 1 kHz (-10 dB) Frequency Response: 35 Hz - 1 kHz (±3 dB) Input Modes: Drivers Parallel / Drivers Discrete Transducer Power Rating (AES): 2400W (9600W peak), 2 hrs Long-Term System Power Rating (IEC): 1600W (6400W peak), 100 hrs Maximum SPL: 30 Hz - 100 Hz: 136 dB-SPL cont avg (142 dB peak) 100 Hz - 500 Hz: 136 dB-SPL cont avg (142 dB peak) System Sensitivity: 30 Hz - 100 Hz: 102 dB 100 Hz - 500 Hz: 102 dB Nominal Impedance: 4 Ω in Parallel-drive mode 2 x 8 Ω in Discrete-drive mode