Condition: Brand New Item Type: Audio Power Amplifier Material: Aluminum Alloy Color: As picture shown Voltage: 12V Maximum Power: 400W Output Resistance: 4-8 Frequency Response: 20-20KHz Peak Power: 3800W Sensibility: 90dB Application: Suitable for 12V car audio system Package List 1 x Audio Power Amplifier 1 x Manual 1 x Accessory 1Adopt high?power non?inductive resistance, good stability, support high temperature working. 2Aluminum alloy cooling hole designed, which has wider contact with the air and faster heat dissipation. 3Its housing uses standard safety interfaces to eliminate inferior accessories. 4Two?color coil transformer, small size, high power, reject all short circuit and improve the utilization rate of PCB board. 5The black diamond capacitor has a mellow sound, which increases the musical expression of the device, greatly enhances the overall sound effect. 6Powerful electric circulating coil ensures sufficient power when the power amplifier is in operation, and it is safer, more efficient and more stable when used. 73D surrounds you to immerse yourself in reality, gives you great using experience. 8When the circuit is shorted, the fuse will automatically disconnect and protective equipment. 9Can push 8?12 inch woofer (double voice coil speaker can also be).