The design and manufacture of the switch-on tone control cycle and the preamplifier are made by us. Contrary to what is done in the market, PCBs were designed to be mounted on the switches and were recovered from the cable cycle. Thus; Switches will last longer, eliminate interference caused by the cables, and provide more modern installation possibilities. In our switched tone control system, the preamplifier is used to steadily raise the signal from the magnetics before entering the mixer / sinker. Key features of the preamp upgrade: * Double layer printed circuit design, * Volume Bass Treble control, * Tone sharpening input, * Minimum dips and cleaner toning, * Less battery consumption (0.6mA), * Longer service life