声频功率放大器 meaning in English

af power amplifier
audio frequency power amplifier
audio power amplifier
audio-power amplifier

Environmental testing requirements and methods for broadcasting receivers , broadcasting television receivers , tape recorders and audio amplifiers
广播收音机广播电视接收机磁带录音机声频功率放大器
The main products are audio power amplifiers , broadcasting controlled tables , large sound amplifying engineering , which is well know for a long time
本厂的声频功率放大器、播音控制桌椅、调音台、大型音响扩声工程等相关产品在国内久负盛名。