Ruby Tubes 12AU7EH-HG High Gain Pre Amp Tube
 
• Low microphonics, high linearity
• Reproduction of the NOS GE 6189
• ECC82 equivalent

Electro-Harmonix tubes are all new designs and are of excellent quality. Many OEMs use relabeled Electro-Harmonix vacuum tubes in their amplifiers. If you want great sounding tubes at a very reasonable price, then Electro-Harmonix tubes should be on your list.