ITEM NAME:XH-M531 DC 12-15V 20W+20W HIFI D Class Dual Channel Digital Amplifier Board Descriptio n Description: 100% brand new and high quality Durable and practical Long service life XH-M531 Yamaha digital amplifier board dual-core chipset, high-resolution HD Class D audio amplifier board Using original two-channel Yamaha chipset, input DC12V output 20W * 2, crystal-clear sound, instantly conquered listening ears Specifications: Yamaha Chipset: YDA138-E Power Range: DC12-15V Output Power: 20W * 2 Frequency Range: 20Hz-60KHz Input Impedance: 10k Output Impedance: 4-8 Europe Dimensions: 43 * 68 * 12mm Efficiency: Greater Than 88% Input Impedance: 10k Output Impedance: 4-8 Europe Number Of Channels: Two-Channel Left And Right Indicator: Green Audio: 3.5 Audio Port Package Included: 1 *Â XH-M531 Yamaha Digital Amplifier Board Note: 1.Due to the manual measurement and different measurement methods, the actual size could be slightly different. 2.Please be reminded that due to lighting effects and monitor's brightness/contrast settings etc, the color tone of the website's photo and the actual item could be slightly different. High quality buy, happy buyï ¼ XH-M531 DC 12-15V 20W+20W HIFI D Class Dual Channel Digital Amplifier Board.Output Power: 20W 2. 1 XH-M531 Yamaha Digital Amplifier Board. Number Of Channels: Two-Channel Left And Right. We want to make sure you are happy with our item. Goods without RMA number will NOT be accepted.