Wall warts for audio (earth grounded or floating?)

Hi Guys,

I'm sorry if this has been asked before, but I didn't find anything that answered my question.

I would love to always put transformers and IEC inlets on my gear, but I'm not allowed to do that here in Germany because as a self-taught electronics enthusiast, I'm not allowed to play with mains. For my own gear, I'm doing that at my on risk, but If I lend gear or build it for someone else, everything has to be legal and safe. This problem leads me to the following questions:

- Can you tell me where (In Europe) to get wall warts with symmetrical +/- 18V output, which also have an earth pin?
  I only find ungrounded wallwarts (or external power adaptors) with 3 pin outlets, where the 0V is just a center tap, floating.

- What's the difference in performance between, for example a GSSL compressor, that gets a floating center-tap and an earth-grounded one?


Best,
-Adrian

I've got the same problem. How did you solved?

Printer power supplies?

I'd be interested in this.....

"Not allowed" to play with mains? I can understand if it's about a product you intend to sell, but otherwise, what the..?

PS: I've yet to see a +/- printer power supply; all the ones i've seen were single-rail.

Here's a thread getting into some of this I think....

https://groupdiy.com/index.php?topic=43488.0

and here.....

https://www.gearslutz.com/board/geekslutz-forum/409401-power-supply-18v-can-i-just-use-wall-wart.html

Actually i think my request comes from misunderstanding (or not understanding at all) the earthing/grounding/shielding subject.  I'm going to post another thread with the right questions about it.