The Electro-Harmonix 12AU7A / ECC82 is a brand new pre-amp tube that is made in Russia. It is a premium quality 12AU7 tube built to match the performance of the military-industrial original GE 6189 tube. Low microphonics and excellent linearity offer a musical and harmonic soundstage, making this 12AU7 tube equal to the original and a cut above the competition.

The Electro Harmonix 12AY7/6072A Preamp Tube is suitable for replacing preamp tubes in Fender Tweed amps. This particular model was originally installed into 1950’s Fender Tweed amplifiers so you can be guaranteed an authentic, vintage tone from your amp with this classic tube design.

The EH-12AX7 tube has a nice balanced sound, a very low noise floor and excellent performance in terms of microphonics. The lack of microphonics may be due in part to the return of a shorter plate structure or better materials. I've had some samples that were tried in various amp stages. Pre-amps, tone stacks and phase inverters, a winner in every location...I have used the EH to successfully tame amps that defied all other attempts to kill microphonics and unwanted feedback. This tube is a winner, buy 'em and try 'em, they may be just the piece you've been looking for