The Electro Harmonix 12AU7 Preamp Tube is a medium-mu twin triode for use in preamplifier and driver circuits.
The main features of the Electro Harmonix 12AU7 Preamp Tube include:
Electro Harmonix 12AU7 EH alt. 6189,ECC82I bought these valves as an upgrade to my Universal Audio LA-610 Mkii. I replaced two valves at positions 2 and 4. After an initial 'burn in' period I recorded some acoustic guitar and vocals. No noticeable noise, smooth highs and great mids and bass from these valves. i would highly recommend them for a similar upgrade they are much better than the stock valves in the unit.
Service and tracking info was really good and considering the times (covid 19) we live in, the delivery was also good.