The MESA/Boogie 5U4GB Rectifier Tube produces a traditional vintage sag with the most elastic and compressed feel of the two 5U4’s that MESA/Boogie offers. Amazing feel and exceptional overall quality make this a factory favorite. Based on classic 1950s technology, the 5U4GB is a vastly improved 5U4 design that is extremely reliable and consistent, as well as more compact compared to original coke bottle 5U4Gs.

As always, feel free to contact our store for more details, or with any questions.