耳机保护电路和胆管高压延迟电路 详解 有关很多高保真 放大电路-Headphone high-voltage protection circuit and delay circuit duct Detailed Information on many high-fidelity amplifier

便携式高保真耳机放大器原理图 PCB源文件(Portable high fidelity headphone amplifier schematic PCB source file)