Review – Shuguang 12AX7B Tube

2:15 pm

Although this Shuguang 12AX7B vacuum tube is listed as a variant of the 12AX7A amplifier tube there is really very little difference to discuss. Physically, they look virtually identical. There may be a slight difference in the colour of the plate coating between A and B but that could have been batch to batch variation. For all intent and purpose this is a 12AX7A that has been screened to select the tubes with the highest gain and lowest noise. One thing that I will say about both the A and B, is that they really sound good for rock and roll. If you are having noise and microphonics issues with the A variant but want to keep the gritty attitude, then you should try the Shuguang 12AX7B before you move on.

2 Responses

  1. Mike Lim
    Mike Lim at |

    The A is smoother sounding more suitable for audiophiles. B is peaky with listener fatigue but good for guitar amps, rock and pop etc.

  2. Dean Warren
    Dean Warren at |

    OK so I would like to try these in a Bogner Shiva 80 watt EL34 .. the re-tube options it states .

    We’ve been supplying tubes for Bogner amps for over 20 years. Use our extensive knowledge, experience and customer feedback to select re-tube packages that will work great in your tube amp.

    I would like to see the specifications for this tube be for I purchase .. A full spec sheet would be great .. Thank you


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