Sam Timberlake grew up surrounded by both music and electronics. He began playing music at age six and later, while learning to play guitar, started searching for guitar tone. He discovered tube amplifiers and wanted to know why they worked so well with the electric guitar. In October 2004, Sam developed his V.A.C. circuit and applied for a patent. All samamp guitar amplifiers are point to point hand wired with "class a" vacuum tube circuitry. The V.A.C. - Variable Amplitude Clipping control (patent pending) is the central feature setting operating parameters of the output tubes.