This amp design uses a plate voltage of 12, although the 12AU7 can handle up to about 330. Since the 12AU7 is of the Twin Triode variety, one tube can be used to amplify both a left and ...

[Marcel]’s low-voltage tube amp design might spark your interest. The design operates with a B+ (plate) voltage of only 40v, making it less intimidating and dangerous than many other amps that ...

NAMM 2025: Bad Cat has announced the welcome return of respected amp designer Mark Sampson – best known as the man who founded Matchless and the design brains behind the brand’s early models ...