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 TIs 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 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