Using a converter is not a good idea. If you use an extension bar then I would get one with US style sockets and just get a Swiss plug compatible cord for the extension bar. Then you can use all US power cords for your system without extra converters. This way you don't introduce any extra converters and you don't have to change plugs either.
I do this myself, using Isoclean extension bars, which I plug into the wall with a high quality German cord and then I use all US cords from there to my gear.
Regards,
Joerg
I do this myself, using Isoclean extension bars, which I plug into the wall with a high quality German cord and then I use all US cords from there to my gear.
Regards,
Joerg