JJ 5751

6 Reviews
SKU: JJ-5751

Availability: Usually ships within 24 hours.

USD $‎15.95
The JJ 5751 tube is often used in place of a 12AX7. They only have 70% of the gain of a 12AX7, and are often used to quiet down guitar amps that have too much gain. You can learn more about this on our tone tweak info page.

Other JJ Electronics tubes12AX7 Types

Additional Information and Downloads

12AX7 Tube Review

Tube Matching Information:
Matched Sections Service

JJ 5751 Datasheet (PDF)

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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

6 reviews

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Helped tame my Blackstar HT-5RH


My Blackstar HT-5RH went from no gain to distortion with barely a turn of the knob. Not so good for getting that classic rock crunch. So I replaced the stock 12AX7 preamp tube with the JJ 5751 and it made it so I have from a light crunch to heavier crunch in between 7-9 o'clock for more of that classic rock feel while retaining the tone and character of the amp. It may have lost some treble after 12 o'clock, but by that point you still have all the gain you could need.