RCA developed the 12AX7 tube in the 1940s for general purpose amplification. Today, 12AX7 is the most common preamp tube used in guitar and audio amp due to its high amplification factor (mu).
We carry a large selection of 12AX7 tubes to help you get the right sonic from your gear. See our Best 12AX7 Review for top choices for your application.
We offer single and matched pairs. Matched pair includes two tubes that are matched to each other.
ECC83, 7025, CV4004 are the same tube as 12AX7. All current production 12AX7 are a drop-in replacement for any of these types. See All about 12AX7 Tube page for answers on common questions about 12AX7.
Single
- JJ/Tesla ECC803SOut of stock
- Genalex ECC83 Gold Lion Standard PinOut of stock
- JJ/Tesla ECC83S$20.95
- TAD 7025WA / 12AX7Out of stock
- JJ/Tesla ECC83S GoldOut of stock
- JJ/Tesla ECC803S GoldOut of stock
- Sovtek 12AX7WBOut of stock
- Electro-Harmonix 12AX7$29.95
- Mullard 12AX7/CV4004$29.95
- Sovtek 12AX7LPSOut of stock
- Electro-Harmonix 7025EH$30.95
- Svetlana 12AX7SV$31.00
- Sovtek 12AX7WC$31.50
- Shuguang 12AX7B Silver DragonOut of stock
- TungSol 12AX7Out of stock
- Mullard 12AX7Out of stock
- Ei 12AX7 NOSOut of stock
- Electro-Harmonix 12AX7 Gold$39.45
- SED 12AX7 NOSOut of stock
- Ei 12AX7 Elite NOSOut of stock
- Sylvania 12AX7WA JANOut of stock
- TungSol ECC803S GoldOut of stock
- EI 12AX7 Elite Gold NOSOut of stock
- Genalex 12AX7 Gold Lion$64.95
- Genalex CV4004/ECC83 Gold Lion$65.95
Matched Pair
- JJ/Tesla ECC803S Matched PairOut of stock
- Genalex ECC83 Gold Lion Standard Pin Matched PairOut of stock
- JJ/Tesla ECC83S Matched Pair$45.90
- TAD 7025WA / 12AX7 Matched PairOut of stock
- JJ/Tesla ECC83S Gold Matched PairOut of stock
- JJ/Tesla ECC803S Gold Matched PairOut of stock
- Mullard 12AX7/CV4004 Matched Pair$63.90
- Electro-Harmonix 12AX7 Matched Pair$63.90
- Electro-Harmonix 7025EH Matched Pair$65.90
- Sovtek 12AX7LPS Matched Pair$65.90
- Svetlana 12AX7SV Matched Pair$66.00
- Shuguang 12AX7B Silver Dragon Matched PairOut of stock
- TungSol 12AX7 Matched Pair$72.70
- Mullard 12AX7 Matched Pair$73.00
- Electro-Harmonix 12AX7 Gold Matched Pair$82.90
- Ei 12AX7 Elite NOS Matched PairOut of stock
- TungSol ECC803S Gold Matched PairOut of stock
- Ei 12AX7 Elite Gold NOS Matched PairOut of stock
- Genalex 12AX7 Gold Lion Matched Pair$133.90
- Genalex CV4004/ECC83 Gold Lion Matched Pair$135.90