The anniversary Hot Drive'n Boost mk 3 has a completely new overdrive design that delivers even more authentic tube simulating overdrive than the revered original HDB. It gives you the sound of a tweaked boutique tube amp without affecting your fundamental tone. There's no midrange emphasis or high- or low-end cut. Equipped with Boost, Level, Wave, and Gain rotary knobs plus Boost and Drive switches to fine-tune and activate your sound. Up to a 20dB boost gives your solos the presence and punch you lust after. A built-in power supply keeps your signal clean. Hand-built in Denmark.