1、5800W 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 resistant. 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. Color: Black Material: Aluminum Alloy Type: Class A/B Channel: 4 Voltage: 12.0V Maximum Power: 4 x 55W Impedance: 4Ω Signal to Noise Ratio(SNR): 90dB Frequency Response: 10Hz-30KHz Product Size: Approx. 34x22x4cm / 13.4x8.7x1.6in 1 x Power Amplifier 1 x Fittings Package 1 x User Manual