Groove Tubes GT-5881-C DUET

GT-5881-C DUET description:

Groove Tubes GT-5881-C Duet: GT exclusive design high power 5881 short bottle. This is a very high vacuum tube that is very stable. It's sweet tone but defined character was a mainstay in the Fender tweed era amps of the 1950s and early 1960s. The tube's short height allows easy use in amps such as Mesa rack mount amps and Marshall power blocks with ease.