Features: 1.Choose 6?10GA audio power wire for wire material selection, which is durable and has better performance. 2.Can connect to 4speakers,meets the need of most users, and bring a better experience. 3.Connect the positive and negative poles of the power supply to prevent the power amplifier from burning out. 4.Made of high quality iron and aluminum alloy, hard, wear?resistant, suitable for long time use. 5.Exquisite production, good performance, excellent workmanship, better meet your needs. Specification: Condition: Item Type: Car Stereo Audio Amplifier Material: Iron + Aluminiu Alloy Color: As the Picture Shown Maximum Power (2ohm) 1450W x 4=5800W Maximum Power (4ohm 725W x 4=2900W RMS Power (2ohm) 700W x 4=2800W RMS Power (4ohm)= 300W x 4=1200W THD: 0.02% Sensitivity: 90dB Frequency Response:20Hz-20KHz Operating Voltage: 12V Application: Universal for Car Note: The power supply must be 12V or the amplifier will burn out.