Fender Blues Junior

[1] Fender also frequently releases limited editions of the Blues Junior, such as the Lacquered Tweed and the "80 Proof".

The later circuit boards are cream or tan colored and sound "brighter" or more treble-oriented, with the reverb situated before the Master volume.

Fender does not always include these limited edition versions in their updated catalogs (or on their website) either because too few were produced (only a few hundred in some cases) or perhaps because of exclusive retailer agreements.

[citation needed] Fender introduced the Blues Junior in 1995 and has revised and updated the amp periodically since then.

Notable differences include the Fender "lightning bolt" speaker, "sparkle" circuit modification, rattle-reducing shock absorbers, set-screw "chicken head" knobs, "dog bone" handle, larger Fender jewel light, black non-reflective control panel, and "Blues Junior" subtext on the logo plate.

[6] In 2018, Fender released a version IV, with a new Celestion A-Type loudspeaker, reworked preamp and a "smoother taper" for the reverb.

However, because they "run hot", a common modification is to add a bias trim to enable adjustments to the idle current when switching tubes.