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最近笔者自装了一台扩大机,前置、音调用的是运放之皇NE5532,功放用的是TDA2030A。打破常规,给功放加装了直流伺服恒流源电路,装毕试机,结果,不管是“紫竹调”还是“夜深沉”,感觉低音总是提不上去,经过一番调整和元件摩机,虽有所改善,但仍不够理想。困惑之中,忽然想起贵刊曾经介绍过用射频线代替高级喇叭线的实验。费费事,将原市售屏蔽信号线换成75-3同轴电缆软线,将功放至音箱的双股平行线换成SYKV75-5同轴电缆线,再一试听,果不其然,大有起色,低音丰富多了,高音更明朗,就好像新擦的玻
I recently installed a self-expanding machine, front, tone is used to play the emperor NE5532, amplifier is used TDA2030A. Break the routine, to the amplifier installed DC servo constant current source circuit, installed test machine, the result, whether it is “Zizhu tune” or “night deep” feeling bass always mention, after some adjustments and components Although it has improved, it is still not satisfactory. Confused, suddenly remembered your magazine has been introduced with the RF cable instead of the high-level speaker line experiment. Fees and extras, the original sales of shielding signal line replaced by 75-3 coaxial cable cord, the amplifier to the speaker double parallel lines replaced by SYKV75-5 coaxial cable, and then audition, of course, a great improvement, bass Rich, louder, clearer, like a new eraser glass