Features: 1.Adopt high?power non?inductive resistance, good stability, support high temperature working. 2.Aluminum alloy cooling hole designed, which has wider contact with the air and faster heat dissipation. 3.Its housing uses standard safety interfaces to eliminate inferior accessories. 4.Two?color coil transformer, small size, high power, reject all short circuit and improve the utilization rate of PCB board. 5.The black diamond capacitor has a mellow sound, which increases the musical expression of the device, greatly enhances the overall sound effect. 6.Powerful electric circulating coil ensures sufficient power when the power amplifier is in operation, and it is safer, more efficient and more stable when used. 7.3D surrounds you to immerse yourself in reality, gives you great using experience. 8.When the circuit is shorted, the fuse will automatically disconnect and protective equipment. 9.Can push 8?12 inch woofer (double voice coil speaker can also be). Specification: Condition: Brand New_x000D_ Item Type: Audio Power Amplifier_x000D_ Material: Aluminum Alloy_x000D_ Color: As picture shown_x000D_ Voltage: 12V_x000D_ Maximum Power: 400W_x000D_ Output Resistance: 4-8_x000D_ Frequency Response: 20-20KHz_x000D_ Peak Power: 3800W_x000D_ Sensibility: 90dB_x000D_ Application: Suitable for 12V car audio system PackageList: 1 x Audio Power Amplifier1 x Manual1 x Accessory