J-20 Diamond Blue Jet Tube Packages

Below we have listed suggested tube upgrades for Ampeg J-20 Diamond Blue Jet amplifiers. In most cases we mention a few popular options for each tube type. These options are upgrade tubes that we find the majority of our Ampeg J-20 amp customers consistently using with exceptional results. Keep in mind that your taste may vary from what we suggest. Please read our tube reviews for an idea of how these tubes sound and to see the other tube options available.

This amp has non-adjustable fixed bias. Learn more about installing new tubes.