Link speakers electrified?

20 replies

If you measure from the metal panel to mains earth with an AC voltmeter there is probably a voltage potential present. This will be caused by a switched mode power supply on the link system. The "tingle" is often felt with double insulated equipment with switched mode power supplies and is nothing to be concerned about.

 

Thanks Cozza.

The double insulation make sense. Without it the speaker had to have an earth connection and that would have removed the potential in the metal parts. 

I have felt this a few times in amny products, most recently my iPhone.

 When docked and charging from mains, it has a kind of electric vibration when touched and more so when hand moved along it.

Would be intrested to know why,

Cheers

Russ

It's exactly the same here on my MacBook Pro. I'm sure there is someone here who can explain this.

Cozza spotted it!

Yes indeed,all the metalwork is grounded to chassis to prevent hum pickup,but due to the double insulation system used(virtual ground?)non of the equipment is actually grounded to earth.

A standing voltage can develop between the equipment and earth,sometimes as much as 50v,quite enough to cause a tingle when touched.

If a signal distribution system is connected for radio/tv signals,this can make things worse,and can cause odd problems with remote control operation.

Sky+ boxes are rather prone to this

It's probably common in display set up's,as they use multiple outlets,and of course have synthetic carpeting/dry air etc which exascerbates the effect.

Nick

Here you are Daniel - buy your wife one of

beauties 😂

Chris.

😁

It doesn´t say how long the cable to the clip is. I need one very long or she have to move the clip as I let her walk around in the house, mostly for cleaning.

(Heaven forbid she ever read this 😮)

Perhaps Daniel, you could mount some sort of bar on the ceiling through the whole house. Your good lady could be tethered to it via a loop a bit like a curtain rail. If she wore some kind of collar with a sticky pad at the back like on an electro-encepholagraph, she could Hoover the whole house and remain at ease.

Andy T.

Wearing a grounded wrist strap won't help, I'm afraid. (Nor for that matter a grounded dog collar!). This is not a build up of static electricity, more of an electrical leakage current. You can feel the same thing on a Beosound 3 when it is on the charger.

Every B&O product i own has this trait, if you can't sense it from touching it, then rub your ear against a metal part of your B&O.

Nothing to worry about, cozza and solderon29 has it in one, double insulation 

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