Electro Harmonix 12AX7

The 12AX7 EH provides high gain with ultra low noise and a detailed - musical tone. Unique spiral filament eliminates that filament-to-cathode induced hum common on AC-powered amps. This tube can be used in phase inverters / preamp sections / driver sections - It does well in all applications.

These are premium and tested on specialised digital and analogue testing equipment by Karltone as follows

• Gain (A)
• Transconductance (gm) 
• Noise (dbv)
• Microphonics
• Emission Quality
• Grid Leakage
• Shorts

Test results are provided with purchase