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一台“sanhe TA—3203”双十段图示频谱均衡器,联机试听,在低频段提升过大时伴有100Hz的低频哼声,中频段明显失真,高频段有些沙哑。打开机盖可见:电源、均衡、频谱显示控制电路相互独立。均衡电路采用6只LM324运放,电路上用的多为普通元件;所有的连线均是很细的劣质线。由于该机的均衡电路比较完善,故对其进行摩机,步骤如下:
A “sanhe TA-3203” dual ten-band graphic spectrum equalizer, online audition, accompanied by a low frequency of 100Hz hum in the low frequency band is too large, the intermediate frequency band is obviously distorted, the high frequency band is somewhat hoarse. Open the lid visible: power, balanced, spectrum display control circuit independent of each other. Equalization circuit using 6 LM324 op amp, the circuit used mostly ordinary components; all the connections are very fine inferior line. As the machine more balanced circuit more perfect, so its friction machine, the steps are as follows: