AcousticFrequency Response: 
40 Hz to 120 Hz (-3 dB) 
35 Hz to 150 Hz (-10 dB) Maximum Peak SPL: 132 dBCrossover Point: 115 Hz plus alignment delay for SRM550 and SRM650 high-definition powered speakers (sold separately)Variable 60 Hz to 120 HzSlope: 3rd order HP, 4th order LPTransducerWoofer Diameter: 18" (457 mm) 
Voice Coil Diameter: 3" (76 mm) 
Material: 
Subwoofer Diaphragm: Paper
Magnet: FerriteAmplifierRated Power: 
800 W RMS
1600 W peakRated THD: <1%Cooling: ConvectionDesign: Class DInput / Output ConnectorsInput Type: Female XLR balanced differential (stereo left / right) 
Input Impedance: 20 kOhms balanced, 10 kOhms unbalanced
Full Range Outputs: Male XLR balanced (parallel with inputs; mono) 
High Pass Outputs: Male XLR balancedPowerLine Input:
US Detachable Line Cord: 100 to 120 VAC, 60 Hz, 200 W
AC Connector: 3-pin IEC 250 VAC
Power Supply Type: Switch modeLEDsDefeatable front power on (displays running man logo) 
Front load power limiter
High-pass mode, input signalSafetyInput Protection: Peak and RMS limiting, power supply and amplifier thermal protectionConstructionCabinet: 0.7" (18.0 mm) Poplar plywood
Finish: High durability black paint
Handles: One on each side
Grille: Powder-coated 16 gauge steelOperating Temperature32 to 104°F (0 to 40°C)Dimensions (H x W x D)22.5 x 22.2 x 23.9" (572.0 x 565.0 x 608.0 mm)Weight64 lb (29 kg)