Features: brand new and high quality In addition to excellent audio performance, TPA3255 also has two major advantages: high power efficiency and ultra-low power level idle loss (less than 2.5W). TPA3255 is a high-performance class D power amplifier, it has class D efficiency and can bring true high-end sound quality. The device features advanced integrated feedback design and proprietary high-speed gate driver error correction function. The device works in AD mode. When the THD is 10%, it can drive up to 2 315W/4R loads and 2 150W (unclipped power)/8R loads, and has a 2 VRMS analog input interface that supports high-performance DAC (For example, TI's PCM5242) seamless connection. This technology allows the device to maintain ultra-low distortion throughout the audio frequency band while exhibiting perfect sound quality. Specifications: Model: TPA3255 Power supply voltage: DC24-48v Power: 300W + 300W Working method: Class D Standby current: 80mA Work efficiency:.>90% Channel: 2.0 Rest/mute: short circuit mute function Output Power: 315W/4Ω, distortion 10% 185W/8Ω, distortion 10% 260W/4Ω, distortion 1% 150W/8Ω, distortion 1% Frequency response: 20Hz to 20KHz Dynamic range: >100 dB Signal to noise ratio: (SNR)> 111dB Working voltage: DC24-40V switching power supply(recommended voltage 36V) Board size: approx. 110x70x35mm/4.33x2.75x1.37in Package Includes: 1PC x Digital Power Amplifier Board note: No retail package. Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!