Features: 1. Use high-quality materials for durability 2.TPA3255 is a high-performance Class D power amplifier chip, which has Class D efficiency and can bring true high-end audio quality to the circuit 3.In addition to excellent audio performance, the TPA3255 also combines two major advantages: high power efficiency and ultra-low power level idle loss (below 2.5W) 4.Stable performance, the product is equipped with high-quality heat sinks 5.Wide application range, suitable for various industrial DIY occasions Parameters: Power amplifier IC: TPA3255 chip Input method: 3.5MM stereo wired socket interface (3P) Work efficiency: 90% Output power: 315W/4 Ω distortion 1.5% 185W/8 Ω distortion 1.5% 260W/4 Ω distortion 1% 150W/8 Ω distortion 1% Frequency response: 20Hz to 20KHz Dynamic range: 100dB Signal to noise ratio: (SNR) 111dB Power supply: DC19 to DC50V (recommended current above 5A) Material: plastic colour: black Package Contents: 1 x Digital power amplifier board Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.