"Fuse-Less" Protection Circuit for Enhanced Sound and User-Friendly Operation
In the event an output tube becomes over-stressed, all you need to do is flip the VK-56SE power switch to restore normal operation. That’s it. In addition, the fuse-less protection circuit in VK-56SE is combined with a world-class automatic-bias circuit that eliminates the constant need to set and readjust the proper bias of the output tubes. No tubes to bias. No tube fuses to replace. It doesn’t get any easier!