Feature: 1. 6800W high-power car amplifier can effectively improve the sound quality of car audio and bring a nice experience to users. 2. It can amplify the weak signal from the audio source or pre-amplifier, without changing the sound quality, and promote the sound of the speaker. 3. Premium aluminum alloy housing, exquisite and beautiful, high-end texture, strong shock resistance. With multiple cooling holes, quick heat dissipation and nice stability. 4. The powerful electric circulating coil ensures sufficient power during operation, and it is safer, more efficient and more stable. 5. Compact and ultra-thin, easy to install. Four-channel high-power design meets the needs of most users. Specification: 4-channel and high-power car amplifier can effectively improve the sound quality of car audio and bring a nice experience to users. Features: 6800W high-power car amplifier can effectively improve the sound quality of car audio and bring a nice experience to users. It can amplify the weak signal from the audio source or pre-amplifier, without changing the sound quality, and promote the sound of the speaker. Premium aluminum alloy housing, exquisite and beautiful, high-end texture, strong shock resistance. With multiple cooling holes, quick heat dissipation and nice stability. The powerful electric circulating coil ensures sufficient power during operation, and it is safer, more efficient and more stable. Compact and ultra-thin, easy to install. Four-channel high-power design meets the needs of most users. Specifications: Color: Black Material: Aluminum Alloy Type: Class A/B Channel: 4 Voltage: 12.0V Max. Power: 4 * 45W Impedance: 4Ω Signal-to-Noise Ratio(SNR): 90dB Frequency Response: 10Hz-30KHz Item Size: 340 * 210 * 45mm/ 13.4 * 8.3 * 1.8in Item Weight: 1.9kg/ 4.2lb Packing List: 1 * Power Amplifier Package List: 1 * Power Amplifier