JBL SUB18 18-inch High-Output Studio Subwoofer Overview:

JBL's most powerful studio subwoofer with very high continuous output and extreme low frequency response.
JBL introduces its most powerful studio subwoofer for applications in which very high continuous output and extreme low frequency response is required. With in-room response below 18Hz and 137 dB peak output, the SUB18 delivers unprecedented performance for demanding dance music production, while providing exceptional accuracy required in cinema post production applications. As an add-on to JBL’s M2 Master Reference Monitor system, the SUB18 allows three times greater output from the system.

Specifications:

• In-room response (2π): Below 18 Hz
• Frequency Response, -10 dB (4π measurement): 20.6 Hz
• Frequency Response, -6 dB (4π measurement): 23.1 Hz
• Maximum Peak Output (2π): 137 dB SPL
• System Input Power Rating, AES/2 Hr.:: LF 2000W continuous/8000W peak
• Sensitivity: 92dB @ 1m, 2.83 V
• Recommended Amplifier Power: 3,500 to 4,000W into 8Ω
• Recommended Signal Processing: Crown iTech HD Power Amplification. Preset for use with JBL M2 available
• LF Transducer: One JBL model 2269H, 18-inch (457 mm); 100mm (4-inch) dual voice coils, 
• dual neodymium magnets. Differential Drive Direct Cooled
• Rated Impedance: 8Ω
• Enclosure: 18mm 11-ply Baltic Birch Plywood
• Finish: Black Lacquer
• Input Connectors: 2 ea. Push Terminals
• Recommended Wire: 12-Gauge
• Dimensions HxWxD 
• (including feet): 27 x 30 x 24 inches (685 x 762 x 620 mm)
• Weight: 100 lbs (45 kg)