Feature: Note:It is a spare part, not a finished product, it needs to be assembled by yourself. TDA7297 pure final stage power amplifier board parts and kits, plus anti-reverse circuit, effectively prevent chip burnout caused by power supply reverse, component re-layout, lead hole spacing is standard 3.96mm, easy for direct wire bonding or on board Add standard terminal blocks. The included components, such as the finished drawing, need to be soldered by yourselves. DIY must see: Recently, there are very few customers who say that the board has noise. We analyze the following reasons: 1. Power supply with commercial power supply, 2. No potentiometer. Solution: 1, must add potentiometer, if you do not add potentiometer, you must use two 47K resistors respectively connected to the left and right channel audio input. 2. If using the mains step-down rectification power supply, the 100uf filter capacitor must be replaced by 1000uf or more (the battery supply does not have to be changed). Some customers say that the heat is big, most of them are not heat sink or the radiator used is too small, you must add a radiator, the recommended radiator size is 100x30x45mm (length x width x height), this part does not contain a radiator . ◆Electronic kit ensures that the component quality is no problem, the line is correct, but because of the difference in hands-on ability and technical level, you can't guarantee your DIY success. Because the baby is cheap, the courier fee is too expensive, so there is no return service. Please be careful. ◆ The core of this power amplifier board is the original imported TDA7297 dual-channel power amplifier chip, produced by the famous European SGS-THOMSON Italian microelectronics company. The power supply is designed for DC power supply. It can be directly powered by 12V battery. The voltage range is 9-15V, the recommended voltage is 12V, the output power is up to 15W+15W, the peak power is 30W+30W, and the volume is very small but super shocking. It is suitable for any occasion. ◆ Volume: 34x29x25mm (length x width x height), ultra-small size, suitable for any space. Voltage: DC 9-15V, recommended voltage 12V, current 2A or more Power: 15W+15W Output impedance: 4-8 ohms Net weight: 10g Package list: 1*DIY power amplifier board Note: Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Manual measurement, please allow 1-10mm error. Thanks for your understanding. ◆ This power amplifier board works as high as 90%, which is very energy-saving. It can be played continuously for more than 5 hours with 12V motorcycle battery. ◆ This 12V power supply small-capacity power amplifier board is worthy of a superb power amplifier module. The owner uses this power amplifier board to push two 6.5-inch 100W speakers with the same sound quality. It doesn't feel too hard and the sound quality is super good. ◆ Need to add volume control potentiometer in front of this power amplifier board, the connection method is very simple, as shown in the above figure ◆ Use this power amplifier board to do your own DIY computer speakers, super money saving, the effect is better than the multimedia speaker with a market price of more than 100 yuan. ◆ This amplifier circuit is designed reasonably and has been listed after rigorous testing. There is no annoying shock when starting up, no static noise, really great!