Testing Standards

At Fuzz Audio:

• We match all tubes for free!
• All vintage tubes are guaranteed for one year.
• All tubes are tested on a calibrated Hickok 539C, Amplitrex, Maxi-Matcher, or other industry standard tube analyzers.
• Preamp tubes are matched by gain and mutual conductance (Gm)
• Power tubes matched by mA and Gm
• All tubes tested for microphonics and are guaranteed to work in your application.
• If you require SUPER LOW noise tubes, please reach out. We will most likely meet your requirements for free.
• Do not hesitate to reach out if you have any questions or concerns, we are here for you.

We guarantee NOS test scores, clean pins, tight matches, and ultimately that they work in your application or YOUR MONEY BACK!

Tubes in photos represent the tube you will receive. Getter construction or logo may differ. Logo may be partially missing or cleaned off. You may or may not receive a box. Tube type, manufacture, and NOS test quality will NOT change. If logos and original boxes are a deal breaker- please reach out before purchase we are always happy to accommodate.