Made In: Great BritainIn contrast to the diverse array of rich tones it generates, the Super 100JH is an extremely straightforward amplifier. Its two channels—High Treble and Normal—each have dual inputs (high and low sensitivity) and separate loudness (volume) controls. Both channels share the amplifier's four tone controls: treble, middle, bass and presence. There are three ECC83 (12AX7) valves in the preamp and a quartet of KT66 valves in the power amp, the standard issue in mid-'60s Marshall Amplifiers. The all-important power transformers are built by Drake, the original manufacturer..