Research the net for Running Springs Audio.
If you want to go cheap however search for power stabilizers on the internet. There are Chinese models on the market, even on ebay, which go for less than 400 Euros, but for those consult a certified electrician before setting them up.
If you want to go cheap however search for power stabilizers on the internet. There are Chinese models on the market, even on ebay, which go for less than 400 Euros, but for those consult a certified electrician before setting them up.