Shuguang 12AX7-A Preamp Vacuum Tube

17 Reviews

Availability: Usually ships within 24 hours.

USD $‎14.95

Note: The Shuguang 12AX7A vacuum tube has been discontinued by the manufacturer. Very limited stock available.

The Chinese (Sino) Shuguang 12AX7-A vacuum tube is popular with Marshall owners for its gain and bite. It is currently re-branded by Penta, Ruby Tubes, Groove Tubes, and many others. Regardless of the name, they are all the same.

These tubes are often not labeled or Shuguang labels them "12AX7" only, and does not include the "A" suffix. However these are "12AX7A" tubes.

Other Shuguang tubes12AX7 Types

Additional Information and Downloads

12AX7 Tube Review

Tube Matching Information:
Matched Sections Service

Warranty Information and Return Policy

Warranty Period: 3 months

All our tubes are guaranteed for 3 months from the date of purchase. (Any exceptions will be noted on that tube's Warranty tab)

If you receive a tube that does not perform to the manufacturer's specifications, please do the following:

- contact us to get a return authorization
- return it via regular mail within 90 days from when we shipped it, and we will provide an exchange or refund of the full purchase price of the tube.

Returns not related to warranty or defect will be considered at our discretion, and are subject to a 15% restocking fee.

We can not accept returns that don't have an authorization, are past 3 month, or are returned improperly.

These guidelines may be updated without notice.

Ratings & Reviews

17 reviews

Fabulous tube with one issue.


I love Shuguang 12AX7A preamp tubes. and more important, so does my Marshall amp. i love this powerful gain & low noise factor. The only thing i can gripe about is the 3-4 month life. surely there’s a way to correct that. all i can say is this THANKS for the tone. love it. Oh please rebuild your factory and get back in business. i have been scraping and searching for the few remaining shuguangs out there.

when are Shuguangs going to be available?


i can’t get Shuguang 12ax7’s due to the fire allegedly- but my JCM 900 doesn’t sound good on any other preamp tubes !!

Prone to microphonic's


I do service repair work so I go through a fair amount of tubes. I bought these a few times I find they sound good a little bit of hiss at times but tons of gain. Biggest issue I had is them going microphonic and I had quite a few unless I got a couple bad batches. I would recommend a tungsol if your looking for gain and reliability but these are cheap and way worth it if you get lucky and they hang in there.

My Go To Preamp 12AX7


For me the magic combination for the tone I'm going with my Traynor YCS50H for consists of Shuguangs in the preamp, a Svetlana 12AX7 in the PI(splitter) and Svetlana EL34s in the power section. Crunchy high gain Marshally goodness. Very articulate and tight. Tonal nirvana!

Shuguangs for me only


Back 8-9 years ago i had to get my Marshall JCM 900 4100 repaired to install new capacitors- regrettably my tech put good German caps in but he put JJ tubes all around and my powerful super chords vanished with the installation of JJ 12AX7’s. 5 years ago I found a triplet of Shuguang 12AX7 and my flame thrower was back. it’s Shuguangs for my Marshall from then on!!