BlackNoise AC filters from Italian manufacturer Systems and Magic are fully passive, using four progressive filtering stages on neutral and live and two on the ground. The circuitry consists of 30 discrete components. Now available for 200 euro.
The BlackNoise Six from Italian manufacturer Systems and Magic is a power distributor without filtering in case your power grid is relative clean. But the Sixt has surge protection not only between neutral and live, as commonly used, but also ...