- JJ Electronic ECC99 for use in audio devices.
- Similar to and can be used interchangeably with 12BH7.
- Great reliability.
- Slightly higher gain than other 12BH7 varieties.
- Consistent performance.
This tube is usually used with smaller tube audio amplifiers as opposed to guitar equipment. It's very similar to the 12BH7 and can be swapped out in most situations (check with the manufacturer though). Can also be used as a driver for directly heated power triodes.