High gain preamplifier tube with a unique spiral filament, top-notch materials and shorter plate structure resulting in supreme microphonic performance. For more clean headroom in your amp, order this tube with the low gain option at no extra cost.(Similar to an NOS 5751 in gain without the price tag). Subject to availability). Avoid these in high voltage cathode follower (CF)spots.
- Fender Pro Reverb Review by Mat
Hello Doug, I have to say your Mullard ri and ehx preamp recommendation for my old pro reverb delivers the goods. Once again you knocked it out of the park.
Mat (Posted on 10/9/16)
- Micro Terror Review by Roger
- I installed this tube in my Orange Micro Terror today (6/11/14). It has more gain and power than the stock tube. Great sound! (Posted on 6/12/14)
- Deep bass Review by ger
- Just received a matched pair of these for the first stage of my Fisher 500 C receiver, which has been rebuilt and retubed a number of times. Nevertheless, was startled at the addition of what seems like another octave of deep, crisp bass. Previous 12AX7s in the system were RCA NOS, one of which had gotten noisy. (Posted on 10/2/12)