Thanks
I need a ups
Thanks
I need a ups
Or AC Line power filter:
http://en.wikipedia.org/wiki/Line_filter
I've got one (filter: 230v/50hz/5A)
But it s very old (fear to destroy the kpa :-D)
I had the same problem when I had an UPS (APC Back-UPS BE550G) between my iMac, soundcard, monitors, Kemper and the wall socket. I removed the UPS and the high pitch noise went away.
This?