Shanks 4k

This is a 2 germanium transistor late 60's Fuzz Face like overdrive booster.  The range of tone is very large and can go from a firm and gorgeous clean tone to an edgy crunch boost.  On top of that, turning up the Fuzz and Bass will get you a thick Fuzz Face like distortion.  It is very touch sensitive so picking strength and guitar volume play a large role in expressing different tones.