1. The board is equipped with two water pond filter capacitors, double insurance, differential input, and the final stage of differential excitation is by composite pair tube current, with high output power and beautiful sound quality. 2. Aluminum alloy material, fan matching, heat dissipation is worry-free, very suitable for assembly and use by enthusiasts who like high-power amplifiers 3. The non-stage adopts composite pair tube current drive with high output power and beautiful sound quality. 4. The output power of 150w+150w high-power circuit is very strong and the sound is beautiful and pleasant 5. Perfect function protection has perfect protection function to work normally parameter: Channel type: 2.0 channel Double working voltage: AC24-32V Chip type: 1943/5200 Overall weight 664g colour: green Material: aluminum alloy +ABS size: 20.5x18.3x7.8CM Package Contents: 1 * power amplifier board Only the above package content, other products are not included. Note: Light 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.