The Superdrive 45 represents years of research culminating in the design of the ultimate KT66 hi gain amp. The bite and complex overtones of Budda's KT66 circuit puts this amp in the realm of a newly discovered tone. The upper mid range bite combined with the tube rectifier sag makes for a very expressive amplifier, super sensitive to touch and pick attack. The bass response is earth shattering and sheer volume will have all the guitar players sniffing around your rig.