4 NOS RCA 12AX7/A (ECC83) Grey Plate Strong & Balanced Gm Matched Quad of Vintage USA Vacuum Tube

Let us know if you would like 12AX7A or 12AX7. We will send 12AX7A by default.

ATTENTION BUYERS - Please Read Our Shipping Terms, Our Testing Standards, Our Return Policy (30 Day Any Fault) and Read Our Great Reviews!

Fuzz Audio is dedicated to keeping its employees and customers safe during the COVID-19 outbreak (please scroll to bottom for more info).

Tube in photo represents tube you will receive. Getter construction or logo may differ (manufacturer will not). We will do our best to match logos and construction when pairs/sets are purchased but test results will come first. If you are looking for a specific getter/plate length/logo, etc. please reach out!

At FuzzAudio(.com):

·      All tubes are tested on a calibrated Hickok 539b & Western Electric KS-16650-L1 Tube Testers.

·      30 Day Money Back Guarantee

·       All power and preamp are tubes tested for Mutual Conductance (Gm)

·      Do not buy power or  preamp tubes that have been tested solely  on an emissions tester or “tube checker”- this is an inadequate test.

Tube Type / Number: 12AX7/A (ECC83) Strong Testers!

We have 12AX7 and 12AX7A available! Please reach out if you would like one or the other! We will send a 12AX7A by default. 

Actual Brand: RCA
Printed Brand: RCA

At Fuzz Audio(.com), all of our tubes are thoroughly tested. No tube tester is perfect, we often test tubes on several different industry grade testers to ensure you get a quality valve.

Boxes currently in stock? - Yes! Beautiful Original Boxes (with pencil tube numbers)

We do not have original boxes for all vintage tubes. If you require an original box, we will do our best to supply one. Contrary to popular belief, roughly 70% of vacuum tubes did not come from the manufacturer individually boxed. Most tubes were manufactured for industrial use and were shipped and stored in large cardboard boxes with lipstick dividers. 

Note: Pre-amp tubes do not need to be matched for 90+% of applications.

FUZZ AUDIO & COVID-19:

Employee Percussions:

-       All products are package with freshly clean hands (we use gloves occasionally but do now want to contribute to protective gear shortages).

-       All packages arriving are placed aside and opened 24 hours later. Employees must wash hands immediately after opening their contents.

-       Every Surface cleaned twice daily. (Door knobs and faucet handles cleaned every 2 hours.

Customer Percussions:

-       We ensure the contents of your package are COVID free.

-       However, please leave package for 24 hours before opening or wipe down outside of package with disinfectant. 

-        WASH YOUR HANDS AFTER HANDLING THE PACKAGE. 

Fuzz Audio will be offering a “discount bin” of used tubes (test NOS) for those who need tubes on a tight budget. 

We will also release a set of premium tubes with 15% donated to COVID 19 relief funds as things continue to become more dire.

Please continue to support your neighbors, friends, family and local business through these crazy times. 

Thank you and be well,

Fuzz Audio