Feature: 1. Class D power amplifier chip with high operating efficiency, and this circuit can deliver truly high-end sound quality. 2. Fine circuit layout, with ТРА3255 high-performance chip, black crystal balanced audio inductors, professional op-amp capacitors, high-capacity audio professional filter capacitor, freely replaceable op-amps. 3. The device features an integrated feedback design and high-speed gated driver error correction, allowing the device to maintain ultra-low distortion at audio bands while delivering high-quality sound.​ 4. Operating in AD mode, the device can drive up to two 315W/4R loads and two 150W (unclipped power)/8R loads at 1.5% THD, and features a 2 VRMS analogue input interface for seamless connection to high-performance DACs such as TI\u0027s PCM5242. 5. In addition to high audio performance, the TPA3255 also combines high power efficiency and ultra-low power-level idle losses (less than 2.5W). 6. This is achieved with 85mR MOSFETs and an optimized gate driver scheme, which significantly reduces the idling loss. 7. High-density pure aluminum heat sinks, which dissipate heat faster for the same volumes. 8. With 3.5MM stereo wired socket connector (3P). Specification: Class D power amplifier chip with high operating efficiency, and this circuit can deliver truly high-end sound quality. Fine circuit layout, with ТРА3255 high-performance chip, black crystal balanced audio inductors, professional op-amp capacitors, high-capacity audio professional filter capacitor, freely replaceable op-amps. ​The device features an integrated feedback design and high-speed gated driver error correction, allowing the device to maintain ultra-low distortion at audio bands while delivering high-quality sound.​ Features:​ Class D power amplifier chip with high operating efficiency, and this circuit can deliver truly high-end sound quality. Fine circuit layout, with ТРА3255 high-performance chip, black crystal balanced audio inductors, professional op-amp capacitors, high-capacity audio professional filter capacitor, freely replaceable op-amps. ​The device features an integrated feedback design and high-speed gated driver error correction, allowing the device to maintain ultra-low distortion at audio bands while delivering high-quality sound.​ Operating in AD mode, the device can drive up to two 315W/4R loads and two 150W (unclipped power)/8R loads at 1.5% THD, and features a 2 VRMS analogue input interface for seamless connection to high-performance DACs such as TI's PCM5242. In addition to high audio performance, the TPA3255 also combines high power efficiency and ultra-low power-level idle losses (less than 2.5W). This is achieved with 85mR MOSFETs and an optimized gate driver scheme, which significantly reduces the idling loss. High-density pure aluminum heat sinks, which dissipate heat faster for the same volumes. With 3.5MM stereo wired socket connector (3P) Specifications: Name: Audio Amplifier Board Material: printed circuit board Integrated circuits: TPA3255 chip Input interface: 3.5mm Working frequency: ＞90% Output power: 315W/4Ω, 1.5% distortion 185W/8Ω, 1.5% distortion 260W/4Ω, 1% distortion 150W/8Ω, 1% distortion Frequency response: 20Hz to 20KHz Dynamic ranges: ＞100dB Signal noise ratio: ＞111dB Power supplys: 19-48VDC, current is recommended to be above 5A Item size: 110 * 70 * 30mm / 4.33 * 2.76 * 1.18in Item weight: 168g / 5.93ounce Package size: 120 * 70 * 40mm / 4.72 * 2.76 * 1.57in Package weight: 175g / 6.17ounce Packing List: 1 * Audio Amplifier Board Package List: 1 * Audio Amplifier Board