Frequency response 20Hz-20kHz Sensitivity 150mv N.W. 1.5kg G.W. 1.7kg Fuse rating 5A Suitable for 12 Volts motorcycles, scooters and yachts Specifications of the amplifier: Working Voltage 10-16V DC MAX power @ 4 50WX2 RMS power @4 25WX2 THD 50dB Channel separation &gt;50dB Frequency response 20Hz-20kHz Sensitivity 150mv N.W. 1.5kg G.W. 1.7kg Fuse rating 5A