产品参数：

System Type: Active subwoofer with two passive radiators
Cabinet: HDF construction Driver Complement  
Woofer:  1 x 12 in. (300mm) hard paper cone, magnetically shielded 2 x 12 in. (300mm) passive radiators 
Power Output:  400 watt, digital amplifier
Crossover: Low Pass Filter: 24dB/octave, switchable from 50-80Hz High Pass Filter: 19Hz, Phase Switch: 0 or 180 degrees 
Input:  RCA and binding post connectors
Protection:  Soft-start, Over-current, Low Voltage, DC and Thermal protection
Sensitivity: 90dB 1W/1m, 2.83V
Finish: Piano Black Matte
Dimensions: 19.25 x 18.5 x 18.5 inches (WDH)
490 x 480 x 480 mm (WDH)
Weight: 78.5 lbs
35.5 kg