- Rectifier tube.
- Made by JJ Electronic.
- Great in hi-fi or guitar amp applications.
- Reliable & durable construction.
- One of the top rectifiers on the market.
The JJ GZ34 / 5AR4 tubes are known for being incredibly long lasting often not requiring a change for years. They're often described as the best new production rectifier tubes and JJ have continuously improved the design and reliability over the last 10+ years.