ขาย บอร์ดขยายเสียงดิจิตอล 300W A30 พลังงานสูง Mono ราคาที่ดีที่สุด

The circuit design is flexible, the sound effect is good, the output power is large, the distortion is small, the performance is stable, the heat resistance is high and the peripheral circuit is simple, etc., it is quite popular in the audio high-power circuit. Use STK350-230, 2SA1943/2SC5200. Inter-stage coupling adopts audiophile grade 4.7UF, natural sound, wide sound field The main circuit adopts a five-ring metal film resistor with an accuracy of ±1%, which ensures a good signal-to-noise ratio of the whole machine. PCB adopts 1.6mm thick double-sided board, 2.0 oz copper thickness spray tin full process to ensure good passing performance of large and small currents. First-class PCB quality. The biggest feature of this board is the use of advanced speaker protection circuit, which effectively eliminates the impact sound of turning on and off and the DC output protection function, making your speakers safer. The wiring layout of the whole circuit board is quite rigorous and reasonable, and the whole PCB wiring adopts one-point grounding method. The power amplifier board can work stably Name: Power amplifier board Main power: DC+-45V (AC: transformer 400W double 32V, need to add rectifier board) Power: 300W 4 ohms, distortion 0.01%, Class A and B Colour:black Material:PCB Package Contents: 1 * Amplifier Board Note: AC is connected to the AC terminal of the main power supply of the transformerOnly 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.