Our Products Amplifier SD-500 SD-500 (Switching Power Subwoofer Amplifier 500W/4ohm) Features : Class D Subwoofer Amplifier With Switching Power Supply. Standby < 0.5W @ Audio Det. Circuit Load Variable Low Pass Frequency Variable Volume Control Variable Phase Control. Auto On/Off Control. Provide High Level In. Provide Low Level In/Out With Limiter Circuit Protection. With DC Off Set Protection. With Output Short Circuit Protection. With Under Voltage Protection. AC 115/230V Switchable. LED Power Indicator. IEC power socket. Specifications : Model No.  : SD-500 Power Output @4 Ohm (RMS)  : 500W THD  : < 1% S/N ratio @ rated power  : > 90dB Input sensitivity @ low level  : 210mV/50Hz  @ High level  : 4.0V/ 50Hz Variable Low Pass Frequency  : 40Hz ~ 200Hz Variable Phase Control  : 0~180 degree Panel Dimension Operation Voltage   : 270*250mm  1) 115Vac +-10%  2) 230Vac +-10% Weight  : kg Please write down your comment on this product, and click Add to Inquiry List for inquiry Add to Inquiry List Review Inquiry List Back