The LEHLE SUNDAY DRIVER SW II is a compact high-end preamp for all types of electric and acoustic instruments - a preamp for electric and acoustic guitars and basses, not to mention other stringed instruments (such as violins, cellos and double basses) to realize their full musical potential. The switchable version expands on the classic LEHLE SUNDAY DRIVER II with a soft-touch foot switch, to activate and deactivate the pedal. The LEHLE-Switch works with a microcontroller and an intelligent True-Bypass-Relay-Circuit with active pop suppression circuit, thereby allowing the LEHLE SUNDAY DRIVER SW II to switch even faster than mechanical switches, noise-free and without wear. The easy-action mushroom-shaped button characteristic of LEHLE products is mounted in the cover, so that your foot pressure is transmitted indirectly, via a spring. Thus the electronics board is not exposed to mechanical loads, making the LEHLE SUNDAY DRIVER SW II virtually indestructible and guaranteeing years of trouble-free switching. When ON, its circuit is based on a discrete Class A circuit with JFET technology and provides two modes of operation, selected by a mode selector switch with gold-plated contacts: "D" stands for Driver: in this mode, your guitar signal is amplified, with absolutely no modification, at the input impedance of a guitar amp, efficiently eliminating losses on the route through leads and effects; the signal remains strong and clear, retaining its full dynamics. The second set