Product Features: 1. The amplifier board features high power and high frequency, which has stable performance. 2. TPA3255 is a high-performance Class D power amplifier chip, it has Class D efficiency and can bring true high-end sound quality circuitry. 3. In addition to excellent audio performance, the TPA3255 also features high power efficiency and ultra-low power stage idle loss (less than 2.5W). 4. Stable performance, the product is equipped with high-quality heat sinks 5. Wide range of applications, suitable for all types of DIY occasions. Product parameters: Power amplifier chip: TPA3255 chip Input : 3.5mm stereo wired socket interface (3P) Work efficiency: Greater than90% Output power: 315W/4 ohms: Distortion 1.5% 185W/8 ohms: distortion 1.5% 260W/4 ohms: Distortion 1% 150W/8 ohms: Distortion 1% Frequency response: 20Hz to 20KHz Dynamic range: Greater than100db Signal-to-noise ratio: 111db Power supply: DC19 to 48v (current recommended to be above 5A) note: Depending on the batch, the electronic components on the amplifier board may be different from the pictures, but the functions are the same and do not affect use. Material: PCB+electronic components+metal colour: Black Package Contents: 1 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.