12AX7 Vacuum Tubes | Genalex, Tung-Sol, Mullard, & more - BOIAudioWorks from BOI AudioWorks
Top » Products in Category: 12AX7 / ECC83 / 7025

12AX7 / ECC83 / 7025

About 12AX7

12AX7 Tube Found in just about all tube guitar amps, 12AX7 is perhaps the most common preamp tube today. We carry over a dozen different hand selected 12AX7 to help you get the right sonic from your gear.

Looking for ECC83, 7025?

12AX7 was also labeled as 12AX7A, ECC83 or 7025. You can use 12AX7 tubes below wherever these types are called for.

Not sure which one? Check out our comprehensive 12AX7 Guide.

Fully tested 12AX7

To ensure you get the best, every 12AX7 go through multiple testing before they are shipped. We also have pre-screened triode matched tubes as well as matched pairs in stock, and have listed them below.

Further screening

We also offer low noise screening. Please refer to our matching and noise screening options.

Electro-Harmonix

12AX7EH

12AX7EH is a good all rounder with good amount of gain. Replaces any 12AX7, 7025 or 12AX7A type tubes including HiFi application. In a guitar amp, 12AX7EH amp application with good bite and definition.
For phase inverters, use triode matched.

In stock
12AX7EH Buy Now $11.00

Electro-Harmonix

12AX7EH Triode Matched

Price is for a triode matched 12AX7EH. Recommended when replacing phase splitter (inverter).

In stock
12AX7EH Triode Matched Buy Now $13.00

Electro-Harmonix

12AX7EH Matched Pair

Price is for a matching pair of 12AX7EH.

In stock
12AX7EH Matched Pair Buy Now $26.00

Electro-Harmonix

12AX7EH Gold

This is a premium version of 12AX7EH. 12AX7EH Gold has gold plated pins for better contact. This is a definite plus for gigging musicians and vintage HiFi amp users alike. 12AX7EH Gold is a quiet, smooth all rounder, excellent for use in both HiFi and guitar amps.

In stock
12AX7EH Gold Buy Now $17.00

Electro-Harmonix

12AX7EH Gold Matched Pair

Price is for a matched pair of 12AX7EH Gold tubes.

In stock
12AX7EH Gold Matched Pair Buy Now $38.00

TungSol

12AX7 TungSol

TungSol 12AX7 is one of the top choices for upgrading stock 12AX7 tubes in both audio and guitar amps. Good sonics with low microphonics in audio application, very well balanced in guitar amps. Replaces any 12AX7, 7025, 12AX7A tubes.

In stock
12AX7 TungSol Buy Now $14.50

TungSol

12AX7 TungSol Matched Pair

The price is for matched pair of TungSol 12AX7.

In stock
12AX7 TungSol Matched Pair Buy Now $33.00

TungSol

12AX7 TungSol Triode Matched

Price is for a triode matched TungSol RI 12AX7.

In stock
12AX7 TungSol Triode Matched Buy Now $16.50

Genalex

12AX7 Gold Lion

Modeled after legendary B759 which was a special select version of 12AX7, this is the top of the line current production 12AX7/ECC83. Built with superb quality, this tube offers resolution, articulation, and hours of sonic enjoyment.

In stock
12AX7 Gold Lion Buy Now $43.50

Genalex

12AX7 Gold Lion Matched Pair

Modeled after legendary B759 which was a special select version of 12AX7, this is the top of the line current production 12AX7/ECC83. Built with superb quality, this tube offers resolution, articulation, and hours of sonic enjoyment. Price is for two matched tubes.

In stock
12AX7 Gold Lion Matched Pair Buy Now $91.00

Genalex

12AX7 Gold Lion Triode Matched

Modeled after legendary B759 which was a special select version of 12AX7, this is the top of the line current production 12AX7/ECC83. Built with superb quality, this tube offers resolution, articulation, and hours of sonic enjoyment.

In stock
12AX7 Gold Lion Triode Matched Buy Now $45.50

Sovtek

12AX7LPS

Sovtek's 12AX7LPS is the best choice for HiFi Audio with excellent sonics. It has a long ribbed plate derived from Siemens design, with a filament that works with both AC and DC supply.

In stock
12AX7LPS Buy Now $13.00

Sovtek

12AX7LPS Matched Pair

The price is for a matched pair.

In stock
12AX7LPS Matched Pair Buy Now $30.00

Sovtek

12AX7LPS Triode Matched

Sovtek's 12AX7LPS is the best choice for HiFi Audio with excellent sonics. It has a long ribbed plate derived from Siemens design, with a filament that works with both AC and DC supply.

In stock
12AX7LPS Triode Matched Buy Now $15.00

Mullard

12AX7 Mullard

Mullard 12AX7 has a long plate construction that gives it fuller low-mids in audio application, as well as good body in guitar amps. An excllent all rounder, Mullard 12AX7 is one of the top choices for upgrading stock 12AX7 tubes.

In stock
12AX7 Mullard Buy Now $16.50

Mullard

12AX7 Mullard Matched Pair

Price is for a matched pair of Russian reproduciton of Mullard 12AX7.

In stock
12AX7 Mullard Matched Pair Buy Now $37.00

Mullard

12AX7 Mullard Triode Matched

Mullard 12AX7 has a long plate construction that gives it fuller low-mids in audio application, as well as good body in guitar amps. An excllent all rounder, Mullard 12AX7 is one of the top choices for upgrading stock 12AX7 tubes.

In stock
12AX7 Mullard Triode Matched Buy Now $18.50

Sovtek

12AX7WA

The OEM workhorse tube used by major amp manufacturers, with warm round tone. Very low in microphonics, and is excellent for use in guitar amps. You can hit it with a stick and it'll barely bat an eye. This is very important for combo amps, or for high volume application.

In stock
12AX7WA Buy Now $10.20

Sovtek

12AX7WA Triode Matched

The OEM workhorse tube used by major amp manufacturers, with warm round tone. Very low in microphonics, and is excellent for use in guitar amps. You can hit it with a stick and it'll barely bat an eye. This is very important for combo amps, or for high volume application.

In stock
12AX7WA Triode Matched Buy Now $12.20

Sovtek

12AX7WB

12AX7WB is the higher gain version of Sovtek 12AX7WA.

In stock
12AX7WB Buy Now $13.00

Sovtek

12AX7WB Triode Matched

12AX7WB is the higher gain version of Sovtek 12AX7WA.

In stock
12AX7WB Triode Matched Buy Now $15.00

Sovtek

12AX7WC

Sovtek 12AX7WC is even higher gain version of Sovtek 12AX7WA/WB.

In stock
12AX7WC Buy Now $13.00

Sovtek

12AX7WC Triode Matched

Sovtek 12AX7WC is even higher gain version of Sovtek 12AX7WA/WB.

In stock
12AX7WC Triode Matched Buy Now $15.00

Shuguang

12AX7B Silver Dragon

These are higher gain version of 12AX7C9 with shiny silver anode. It has a bit more bite than C9 in guitar amps.

Please note that recent version of 12AX7B comes with grey coating on anode.

In stock
12AX7B Silver Dragon Buy Now $9.50

Shuguang

12AX7B Silver Dragon Matched Pair

Price is for a matched pair of 12AX7B Silver Doragon. These are higher gain version of 12AX7C9 with shiny silver anode. It has a bit more bite than C9 in guitar amps.

Please note that recent version of 12AX7B comes with grey coating on anode.

In stock
12AX7B Silver Dragon Matched Pair Buy Now $23.00

Shuguang

12AX7B Silver Dragon Triode Matched

These are higher gain version of 12AX7C9 with shiny silver anode. It has a bit more bite than C9 in guitar amps.

Please note that recent version of 12AX7B comes with grey coating on anode.

In stock
12AX7B Silver Dragon Triode Matched Buy Now $11.50

JJ/Tesla

ECC803S JJ

Modeled after Tesla ECC803S, this long plate version of ECC83 delivers warmth and detail. Excellent for audio application.

In stock
ECC803S JJ Buy Now $14.00

JJ/Tesla

ECC803S JJ Matched Pair

Brand new release from JJ, this is a re-issue of Tesla long plate ECC803S. Price is for a matching pair (2 tubes)

In stock
ECC803S JJ Matched Pair Buy Now $32.00

JJ/Tesla

ECC803S JJ Gold

Another new release from JJ, this is the gold pin version of long plate ECC803S

In stock
ECC803S JJ Gold Buy Now $25.50

JJ/Tesla

ECC803S JJ Gold Matched Pair

Matched pair of ECC803S JJ Gold Pin

In stock
ECC803S JJ Gold Matched Pair Buy Now $55.00

TungSol

ECC803S TS Gold

This is the gold pin version of standard TungSol 12AX7. Made in Russia.

In stock
ECC803S TS Gold Buy Now $24.00

TungSol

ECC803S TS Gold Matched Pair

Price is for a matched pair of TungSol ECC803S Gold tubes.

In stock
ECC803S TS Gold Matched Pair Buy Now $52.00

JJ/Tesla

ECC83S JJ

Derived from rare Telefunken design, it gives out nice, rich harmonics in guitar amps. It also does very well on audiophile or recording application. It's quiet and low in microphonics due to short plate design and thick glass.

In stock
ECC83S JJ Buy Now $10.00

JJ/Tesla

ECC83S JJ Matched Pair

Price is for hand selected matching pair of JJ ECC83S.

In stock
ECC83S JJ Matched Pair Buy Now $24.00

JJ/Tesla

ECC83S JJ Triode Matched

Price for a triode matched JJ ECC83S.

In stock
ECC83S JJ Triode Matched Buy Now $12.00

JJ/Tesla

ECC83S JJ Gold

TRIODE, DUAL
Newly released from JJ, this is the gold pin version of ECC83S. Very low microphonics and tight tolerances.

In stock
ECC83S JJ Gold Buy Now $23.50

JJ/Tesla

ECC83S JJ Gold Matched Pair

Price is for a matched pair of ECC83S JJ Gold

In stock
ECC83S JJ Gold Matched Pair Buy Now $51.00

TAD

7025WA / 12AX7 TAD

Nickel plated TAD 7025WA has good amounts of gain yet very low in unwanted microphonic noise. Not overly trebly, but smooth when pushed.

This tube is ideal if you play high gain style of music and microphonic is an issue.

In stock
7025WA / 12AX7 TAD Buy Now $21.00

TAD

7025WA / 12AX7 TAD Triode Matched

Nickel plated TAD 7025WA has good amounts of gain yet very low in unwanted microphonic noise. Not overly trebly, but smooth when pushed.

This tube is ideal if you play high gain style of music and microphonic is an issue.

In stock
7025WA / 12AX7 TAD Triode Matched Buy Now $23.00

NOS OFFERINGS

The following is NOS and vintage tubes in this category. Due to the scarcity of some items, inventory will change constantly, so please check back often. Be sure to check out our NOS terms.

The photos of NOS tubes are representative samples and actual NOS tube shipped may vary. "Various" means we have multiple brands in stock.


Sylvania

12AX7WA Sylvania JAN NOS

TRIODE, DUAL
Sylvania made from the 1970's. These are some of the last US made from the wonderful 70's with big, round tone.

Sold out - Please inquire
12AX7WA Sylvania JAN NOS

Ei

12AX7Ei Silver Bullet

Superb sounding 12AX7 with flat plate design. Design closely resembles that of Telefunken ECC83, as Ei built their 12AX7 tubes on Telefunken supplied equipment.

The tubes will be in white boxes. Ei stamped logo may have faded in some cases. Note that the tubes tend to be microphonic, and are not recommended for high gain application.

While supplies last, we only have a very limited number of nickel plated 12AX7 Ei tubes in stock.

Sold out - Please inquire
12AX7Ei Silver Bullet
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