Adapter power supply: working voltage range 10-30VDC, limit 31V. It is recommended to use a DC power supply with a voltage of 24-30V and a current of more than 10A. The higher the voltage, the greater the output power. Never connect to AC power, otherwise it will burn out! Adapter speaker: 3-8 ohms, 20-100W in BTL dual-channel mode; 2-8 ohms, 50-200W in PBTL mono mode High current, low magnetic loss, small parasitic capacitance, low heat generation, use of oxygen free copper wire to improve sound quality; The magnetic shielding mechanism has strong anti electromagnetic interference EMI performance. Thickened heat sink, silent and long-life fan; Solved the heat dissipation problem and better utilized the advantages of high power Transparent sound, fast low-frequency response, strong mid frequency texture, high frequency smoothness, and minimal tangent loss Product model: ZK-2001 Colour:Black Material:PCB Package Contents: 2x power amplifier board 2x 3P double-ended shielded cable