DOEPKE DFS 2 F & 4 F Audio Grade Differential Switches

Differential switches are obligatory in all home electricity systems. As opposed to a fuse (for instance the Cylindric Fuse Cartridge), which is meant to prevent a fire in case of a short circuit, the main function of a differential switch is to protect against electrocution. A differential switch compares the in- and outgoing currents through live and neutral, the sum of these has to be zero. The only disturbance possible in this balance is, when a certain current flows to earth. If this current flows through the body of a human being, this can be life threatening. This is where the differential switch kicks in and disconnects the circuit from the mains if this current is over 30 mA.

Audio/video enthusiasts sometimes tend to bypass their differential switch, this is, however, illegal and highly unsafe. Insurance companies will not pay if they notice this has been done. We strongly discourage doing so. The best thing is, you don't need to anymore with the introduction of the Doepke DFS differential switch. 

One might perceive the Doepke DFS as a luxury version of the standard differential switch which only uses better materials. Nothing could be further from the truth. The Doepke DFS is the result of solid engineering which really eliminates the detrimental effects of the standard switch. For instance, a standard switch uses coils with many windings which add an inductive reactance to the circuit. The Doepke DFS uses just a straight feed through wire in conjunction with an amplifier to ensure sensitivity. Moreover, premium materials and contacts ensure that the Ohmic resistance is negligible.

Soundwise, you will hear more dynamics and details. As a matter of fact, all audiophile and videophile aspects will improve.