1. The board is equipped with two large water pond filter capacitors, double insurance, differential input, and the final stage of differential excitation is driven 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 make it 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 shooting 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.