7591S

The JJ 7591S is a modern replacement for all classic 7591 applications. These tubes retain that classic lively character 7591’s are known for while still offering a very warm and round overall sound.

Please note the JJ 7591S has a seated height of 3-1/8″ (8cm) which is slightly taller than some historic 7591’s. If you’re using these in an older Receiver (Scott, Fisher, etc..) you should double check the vertical clearance.

After a 24 hour burn in all power tubes are tested for noise and matched at multiple operating points for plate current (± one milliamp) and transconductance. Please leave us a note in the comments section as to what amp they’re going into and or if you’re looking for a specific grade.