I've been feeding my HiFi with a balanced power transformer the last few months to good effect. But lately I've been considering internal fusing on the components. Since there is no Neutral & Live wire anymore, just two Live wires, if the internal fuse blows it only affects the wire that has always been Live. The formerly Neutral unfused wire is still Live in a balanced system, I think. So if I have the opportunity, especially on the amplifier, it seems good to fuse the second Live wire, right?