Small volume digital class D high fidelity 2.1 channel subwoofer 12V audio amplifier board, widely used in home TV audio, car speakers, multimedia audio, computer desktop audio speaker, and advertising machine etc. PCB material: FR-4 fiberglass board, thickness: 1.6mm. Onboard fixing hole diameter: M3; The left and right channels use a low-power enthusiast audio dedicated chip TDA1517P as an output stage, which really provides high quality results. Power input: DC 6.5-15V (depending on the required output power), eg. power adapter, switching power supply, battery, etc. [ In order to obtain a more shocking effect, Suggest power supply voltage largeer than 13.5V DC], the recommended current is more than 3A. Power interface is 5.5x2.1 DC socket or pad of welding wire; Audio input interface: 3.5mm plug or pad of welding wire; Left and right channel output power: 6W+6W, it is recommended to use 2-4 inch, 4-8Ω 3-25W full-range speaker; Bass output power: maximum 25W, it is recommended to use 4-6 inch, 4-6Ω 20-50W subwoofer speaker.(The above power requires about 13.5V power supply. Board size: 2.48x1.77x0.78inch (LxWxH), excluding potentiometer handle length(Pot. protruding length 0.59inch); Potentiometer shaft center distance: 0.94inch/24mm, potentiometer mounting hole diameter needs 0.28inch/7mm. Color:As Shown Material:Electronic Component Package Contents: 1 * Digital amplifier board Only the above package content, other products are not included. Note: Light reflection 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.