The MESA EL34 STR-442 is a premium grade power tube that was sold as an upgrade for Mesa Boogie amplifiers. An outstanding choice for ANY EL34 based amps and all styles of music. Color coding varies but you can submit a request and we will provide it if available.

These are not the currently available tubes sold by Mesa Dealers. We are not affiliated with Mesa and do not represent them in any way.

I only have a very limited stock and you probably won't find them new anywhere else. When these are gone, they're gone.