review33.com:影音天地:AV amp 前置preout 去 power amp 有好大電流聲，請大家幫忙

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[#1] AV amp 前置preout 去 power amp 有好大電流聲，請大家幫忙如題，唔知點解決，請大家幫忙！！！ AV amp （denon avc-x6700h）前置pre-out 去 power amp 有好大電流聲，（試過換唔同既RCA，試過換唔同電源線，試過電源分開拖板插都唔得） AV amp 前置pre-out 去合併機 AV bypass 冇事，合併機 pre-out 去 power amp 都冇事所以AV amp 同 power amp都應該冇問題		daniel0321 正式會員 59.xxx.xxx.134	2021-01-12 12:43

[#2] AV amp 前置preout 去 power amp 有好大電流聲，請大家幫忙
Do you have any LED light turn on when you hear the hum noise? If yes, try to turn off all LED light.

onecue147

正式會員
61.xxx.xxx.131

2021-01-12 13:46

[#3] AV amp 前置preout 去 power amp 有好大電流聲，請大家幫忙
多數是天線問題，你試下甩開天線，如果無左電流聲，去買個天線 Isolator 就可解決

gorgeous

正式會員
14.xxx.xxx.158

2021-01-12 14:10

[#4] AV amp 前置preout 去 power amp 有好大電流聲，請大家幫忙
地迴路引起hum 声，amplifier 駁 AV 好易有 hum 声，尤其駁左 TV, 好多時个訊号會帶电，引起 hum 声。

254mm

正式會員
1.xxx.xxx.226

2021-01-12 14:31

[#5] AV amp 前置preout 去 power amp 有好大電流聲，請大家幫忙
部AV amp 插 RCA 去 power amp，AV amp 冇著機，只係Standby mode 都已經聽到有好大電流聲，
部AV amp 係冇插到任何天線同HDMI，只有RCA 去 power amp

daniel0321

正式會員
59.xxx.xxx.134

2021-01-12 14:56

[#6] AV amp 前置preout 去 power amp 有好大電流聲，請大家幫忙
Try try :

https://post76.hk/thread-32725-1-1.html

onecue147

正式會員
61.xxx.xxx.131

2021-01-12 15:03

[#7] AV amp 前置preout 去 power amp 有好大電流聲，請大家幫忙
AV amp 係冇插到任何天線 ---＞但你的天線looping是相通的, 所以甩開天線問題就可解決

gorgeous

正式會員
119.xxx.xxx.165

2021-01-12 15:14

[#8] AV amp 前置preout 去 power amp 有好大電流聲，請大家幫忙
但AV amp 前置pre-out 去合併機 AV bypass 冇事，冇電流聲，點解呢？？？

daniel0321

正式會員
59.xxx.xxx.134

2021-01-12 16:48

[#9] AV amp 前置preout 去 power amp 有好大電流聲，請大家幫忙
You have ground loop problem between av amp & power amp.

mcc2018

會員
218.xxx.xxx.114

2021-01-12 17:06

[#10] AV amp 前置preout 去 power amp 有好大電流聲，請大家幫忙
mcc2018 －＞ You have ground loop problem between av amp & power amp.
可以點解決？

daniel0321

正式會員
59.xxx.xxx.134

2021-01-12 17:14

[#11] AV amp 前置preout 去 power amp 有好大電流聲，請大家幫忙
Check if your mains plug is grounded with the chassis, try disconnect as shown below. Make sure the source end is properly grounded for safety.

mcc2018

會員
218.xxx.xxx.114

2021-01-12 17:20

[#12] AV amp 前置preout 去 power amp 有好大電流聲，請大家幫忙
https://www.psaudio.com/ps_how/how-to-find-and-fix-hum/
情況好似咁
120Hz hum/buzz typical of ground loop problems.

daniel0321

正式會員
59.xxx.xxx.134

2021-01-12 17:26

[#13] AV amp 前置preout 去 power amp 有好大電流聲，請大家幫忙
你部AV amp 無接駁電親嗎？有，你試試移除電視天線睇睇

國大代表

會員
45.xxx.xxx.31

2021-01-13 09:42

[#14] AV amp 前置preout 去 power amp 有好大電流聲，請大家幫忙
部AV amp 無接駁電視

daniel0321

正式會員
59.xxx.xxx.134

2021-01-13 12:55

[#15] AV amp 前置preout 去 power amp 有好大電流聲，請大家幫忙
#9

Dear mcc2018,

Where could we find those pictures and explanation (regarding ground loop)?

Thanks.

最後修改時間: 2021-01-13 13:14:15

Krell

正式會員
42.xxx.xxx.28

2021-01-13 13:13

[#16] AV amp 前置preout 去 power amp 有好大電流聲，請大家幫忙
#15, please ref below:
https://www.audiosciencereview.com/forum/index.php?threads/ground-loops-101.7162/

mcc2018

會員
45.xxx.xxx.210

2021-01-13 14:22

[#17] AV amp 前置preout 去 power amp 有好大電流聲，請大家幫忙
i had a similar problem. my av amp is denon 6500. eventually found that it was the tv antenna. the antenna cable was plugged into now tv box, which was plugged to denon. once i unplugged the antenna cable from now tv box, the noise was gone.

tony5229

會員
183.xxx.xxx.245

2021-01-13 15:08

[#18] AV amp 前置preout 去 power amp 有好大電流聲，請大家幫忙
For TV/Radio antenna ground loop problem, the galvanic antenna isolator such as the one shown below is a must: