Now It's the latest version , it is the product after the new model change in 2023, which has completely improved the common problem of high voltage protection. The use of 50V is also completely normal, and the use of materials is also more feverish. The auxiliary power supply uses Class A linear power supply, which is more dynamic, and the sound quality is significantly improved! It can perfectly drive 2-16 Euro speakers! TPA3255 is a high-performance class D power amplifier chip, which has class D efficiency and can bring true high-end audio quality circuit. The device features advanced integrated feedback design and proprietary high-speed gate driver error correction function (PurePath ™ UHD). This technology can enable the device to maintain ultra-low distortion in the entire audio frequency band, while displaying sound quality. The device works in AD mode. When the THD is 1.5%, it can drive up to two 315W/4R loads and two 150W (unshipped power)/8R loads, and has a unique 2 VRMS analog input interface, which supports seamless connection with high-performance DAC (such as TI's PCM5242). In addition to excellent audio performance, TPA3255 also has two advantages: high power efficiency and ultra-low power level idle loss (less than 2.5W). This can be achieved through 85mR MOSFET and optimized gate driver scheme. Compared with the traditional discrete implementation scheme, this scheme can significantly reduce idle loss.
Power amplifier IC: TPA3255 chip

Input mode: 3.5M stereo wired socket interface (3P)

Work efficiency:>90% upgrade board has Bluetooth 5.1 input mode

Output power: 315W/4 Ohms, distortion 1.5% 185W/8 Ohms, distortion 1.5%, 260W/4 Ohms, distortion 19%, 150W/8 Ohms, distortion 19%

Frequency response: 20Hz to 20KHz

Dynamic range:>100dB

Signal-to-noise ratio (SNR):>111db

Power supply: the current from DCI9 to DC48V is recommended to be more than 5A

Size: 122 * 73m 30MM

Net weight: 0.245KG