说明：  集成电路TDA2030为中心组成的功率放大器，具有失真小、外围元件少、装配简单、功率大、保真度高等特点，很适合无线电爱好者和音响发烧友自制，学生组装。
(IC TDA2030 power amplifier for the center of the composition, with less distortion, fewer external components, the assembly of simple, high power, high fidelity, etc., are suitable for radio enthusiasts and audiophiles made, the students assembled.)