Features:TDA2030A is widely used as Hi-Fi amplifier manifold in many computer active speakers.Easy Installation.It has the function of thermal shutdown, current limiting.Minimum transmission distortionSpecifications:Output : Maximum 18WSupply Voltage: DC 9V-24V( recommended DC 12V, this voltage to the heat sink requirements are very low;Maximum supply of this board is actually up to 40V, but you need to change the board's own electrolyticcapacitor C1, the capacitor voltage value is higher than supply voltage can be use. )Static Current: about 25mA( disconnect to tone, connect to 8 speaker, 12V supply. )Speaker Impendance: 4-8 harmonic distortion: THD 0.08%(Po=0.1 to 14W,RL=4)SNR: 94dB-106dB(1W-15W)Heat: The higher the supply voltage, the great the volume, the higher the heatType: Voltage RegulatorCondition: NewDIY Supplies: ElectricalColor: greenMaterial: PC + MetalPackage Contents:1 * Audio Amplifier BoardOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.