Electro Harmonix 12AX7EH High Gain Pre Amp Vacuum Tube
High gain, ULTRA low noise/microphonics.
Forget about Telefunken. The 12AX7EH provides high gain with ultra 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.