GaryW 發表於 2006-4-28 16:21:50

hum problem, please help

I encounter hum problem now, that is my normal connection, no hum

CD analog(RCA) -＞ pre-amp(CD) -＞ poweramp
CD digital(COX) -＞ DAC -＞ pre-amp(Tuner) -＞ power-amp

after I add one more digital out from CD to same DAC

CD digital(XLR) -＞ DAC -＞ pre-amp(DAT) -＞ power-amp

Then I got hum nosie, the only solution is remove CD analog connection

my CD has three digital out (TOS/COX/XLR) and two analog out (XLR/RCA)
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