Digital 2.1 Channel Subwoofer Amplifier Board, Mini Dc12V-15V Tda1517P Hifi Product Features 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 5.5*2.1 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, 4-8? 3-25W full-range speaker; Bass output power: maximum 25W, it is recommended to use 4-6 inch, 4-6? 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. Shipping: Shipping is complimentary within the lower 48 US States. We Do Not Ship to PO/APO Boxes, HI or Alaska We Do Not Ship Outside of the Continental US All items ship within 24-72 hours of Payment For large items that require Freight shipping a valid phone number is required to call and schedule your delivery Terms of Sale and Feedback: Feedback is extremely important to us and If you are satisfied with our transaction, please take a moment to leave Positive Feedback. YOUR Satisfaction is our #1 Priority! If there are any issues, PLEASE contact us BEFORE leaving a neutral or negative rating so that we may resolve any concerns. We PROMISE we can make you happy if you give us a fair chance. Returns / Concerns: All items qualify for returns within 14 - 30 days of receipt. Buyer is responsible for return shipping on any item that is not damaged Please be sure this is an item you want before making your purchase. Customer Satisfaction is our TOP priority! All items are IN STOCK at time of listing. Inventory changes constantly and it is impossible to maintain a perfectly accurate count of all items. Please do not penalize us if we have to issue you a refund! Thank You For Your Business!