191问答库 > 我这个音响的变压器是220v变20v的 我想用12v的直流电来用这个音响 要怎么改

我这个音响的变压器是220v变20v的 我想用12v的直流电来用这个音响 要怎么改

2025-03-15 07:51:27
推荐回答（2个）
回答1：

未清楚主板上整流电路结构，只知变压器次级绕组为20vx2中间抽头，如果是单电源供电，又整流部份是全波整流线路，主板供电压就有30多伏直流，12v直流电源供电可能太小！如果是双电源功放电路，可以用两组直流电源试试效果。但仍需要知道整流部份线路是什麼和实际需要功作电压是多少！

回答2：

不行，你的功放是双电源。

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