As the topic.
when in low volume or idle its a low humming from both speakers. one slightly more than the other.
i know its not det signal and i have opened them and checked the isolation, its white and in good condition.
so B&O aficionados is there a simpel fix for the issue like cleaning som contact?
// first time bang & olufsen owner.
Thank you to our Sponsors
beolab 4000 smal humming sound when idle.
9 replies
What input do you use: PowerLink or RCA?
Location: The Netherlands
My B&O Icons:
i use RCA, have tryd powerlink from my beocenter 3000 with same result.
Some noise is normal.
Especially for speakers with class A/B amplifiers.
If the power LED on your speakers are also a power switch then they got class A/B amps. If the LED is LED only (not a switch you can push) they got IcePower digital amps.
If you can hear the noise within 1 meter distance but not let's say 2 meters away it's what I would define as normal.
I understand it’s normal when the speaker is 20 years old. but I don’t believe b&o intended the noise to be there.
Someone must have solved the same problem before.
It could be a matter of using a properly screened signal cable.
Martin
Beolab 4000 will never be 100% quiet. It's more or less in the nature of active speakers. Keep in mind that they are on max volume constantly and will amplify every bit of noise picked up by the signal cable (read: "antenna"). Even with a shorted RCA plug inserted, they will almost always produce a very slight hum when out of standby. As mentioned by Ravsted above, if you cannot hear it unless very close to the speaker, it can be considered normal. Martin
Please Log In to Reply
You must be logged in as a BeoWorld member to post replies to forum threads.
or
Join BeoWorld
Register to access the forums, reference material, and exclusive member benefits — including our monthly prize draw.
Become a MemberDecember 2026 Prize Draw
Gold Members OnlyAs a Gold member you're automatically entered into our exclusive prize draw — your chance to win iconic Bang & Olufsen products. A unique benefit of BeoWorld Gold membership, every draw brings a new opportunity to win something special.
1st Prize
2nd Prize
3rd Prize