Electro-Harmonix is rocking the vacuum tube community with the superior quality of the "EH" series tubes. Electro-Harmonix sound effects are world renown for the soulful warmth of their analog sound. This line of "EH" premium tubes continues in this tradition of classic tone.
Forget about Telefunken. The 12AX7EH provides high gain with low noise and detailed, musical tone that rivals the most desirable NOS types. Unique spiral filament eliminates filament to cathode induced hum common on amps that use AC on the filaments.