Beovox C75 CX 100 cases coated?

Dear members,

I've just received my first pair of Beovox C75s and tried cleaning them with foam cleaner. It generally pretty mild and doesn't contain any alcohol or the like. However, the dull aluminum case is now shiny in spots where there was more of the foam cleaner. So it seems that there is some sort of coating on the cases of these speakers that has reacted with some of the ingrediants in the foam cleaner. I've encountered something similar with a Beogram 7000 platter that I've tried cleaning with alcohol some time ago. Ok, that was clearly my fault. But foam cleaner on the aluminum cases of the Beovoxes leaves me kind of puzzled. Does anybody have an explanation for what happened?

Greetings,

Kai

Or is it pure aluminum and it's just a layer of oxide that came off...

Any ideas?

The CX alu speaker cabinets have a surface coating, that makes them not feel cold to the touch and protects the
aluminium from finger-acid etc.
If you wash it off, it's gone.
You should only clean the speakers as mentioned in the user manual.
No alcohol.

Same goes for the Beogram platters. They have a similar coating which also performs an antistatic function.
My recommendation is that you never clean platters with anything else but a soft cloth.
(A search in the forum would bring up a quite heatet discussion we had about this a couple of years ago, where
one or two Beogram owners found out they could clean and polish their platters to a mirror-like shine (some people like shiny things),
but the antistatic coating is gone forever if you clean it off - and the Beograms weren't designed or intended to look any other way).

Martin

Thanks Martin,

there was no alcohol contained. It was TFT cleaner. But apparently it reacted with the coating. Sad.

Greetings,

Kai

Get all the rest of the coating off and give them a polish with coconut oil.

Will the coconut oil help return antistatic properties to a platter that has many shinny spots?

I wouldn't put it on a platter as it would likely leave some residue on your records Peter.

Im not sure how the anti-static coating works either... Would it have to be insulating or conductive? My gut says conductive to ground the platter but in that case why would it have a coating at all?

To ground the record to the platter.

thats where the static builds up when rotating.

martin

What I'm really worried about is that TFT foam cleaner without any alcohol was able to do this. I always thought that TFT foam cleaner is as mild as it gets. Apparently not this one in combination with the C75s...

The coating on the platters cant even handle a mild soap.

Martin