ARCHIVED FORUM -- March 2012 to February 2022READ ONLY FORUM
This is the second Archived Forum which was active between 1st March 2012 and 23rd February 2022
Hi All, I'm baffled by a problem I'm having with a pair of BeoLab 6000s. I have these connected to an Amazon Echo, through the 3.5mm jack to RCA breakout tail, to the line (non-Powerlink) connections on the speakers. When the Echo is 'active' (playing music or responding to a question) then everything is fine and even when nothing is playing, the whole system is silent. However as soon as the Echo goes into standby mode, which happens about 5 seconds after it's finished it's last 'task', then there is instantly a loud 50hz hum from the speakers. As soon as I wake the Echo up again (by talking to it) the hum dissapears.
I have tried a laptop instead of the Echo, and the same occurs, if the laptop is 'on' there no hum from the speakers, but if the laptop if off or in sleep mode, there is very loud hum from the speakers. If I disconnect the audio cable from the Echo end - the buzzing continues, but if I disconnect the audio cable from the speaker end, the hum stops. So from this I am guessing a current is getting induced in the audio cable from the power cable? But if so - why does the humming stop when the source equipment is active? How could I fix this permanently? Another forum suggested buying RCA cables with an earth wire... but there is no-where to attach this on either the speaker or the laptop. Do I need something like 'shielded' RCA cables?
Help!
Thank you!