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Contains 2 SAG ECC83S and 1 AX7-MPI tubes optimized for the preamp stage of Marshall-style amps.
Early 70's vintage gain levels with a returned wider frequency response.
Refresh your amp with these pro-approved tubes.
The most powerful EL84 available!
Hand-selected for musical quality.
Contains 2 selected lower gain, slow rise-time 12AX7C tubes optimized for the preamp stage of Fender...
Classic Sylvania STR sound.
Great for Fenders!