The JJ ECC803S long plate version of the ECC83S is an ECC83/12AX7/7025 compatible valve and it is basically a long plated version with built in extra cooling. So it is designed for long service life. Feedback is that the longer plate enhances the bass and mid range as compared to the “standard” ECC83S. Longer plate valves are more likely to be microphonic than short plate valves so if you plan to use this valve in a combo amp , then you should use a damper ring on the valve. This issue is not a problem in amp heads. Click here for our blog article which discusses long plate valves
Each ECC803S is tested by us and we sell standard and Supermatch which has each triode in the ECC803S matched to each other so that you have a well balanced valve in your amp. For the Supermatch option select YES
Dont forget our industry leading 120 day warranty !! We test every valve we sell, on our analogue and digital testers.