Ericsson 403b vaccum tubes direct upgrade for Chinese 6j1 tubes. Best upgrade money can buy at affordable rate

Made in sweeden these r direct copies of the western electric 403bs used in many different ways ranging back to world war 2 era The reason these r better sounding IMO they r technically a newer version of the 5591 403b vac tube class with 9 pins remember that Not 7 pins but 9 make sure u understand what your buying. These after a short burn in time gave me stunning dynamics field of depth better sound stage and stronger bass response without any distortion. These sell on ebay normally 4 just a single tube on avg 25 dollars.i personally felt that price was absurd but the seller who sold m3 these said more expensive due to several factors including h3 had to ship them from his EU country all the way down south to Texas. So yes I paid 100 for 4 but it was fun to tube roll. I recently sold my xduuo amp so that's the reason some dude here who appreciates good tube sound will be happy to see a amazing deal for once instead of con men asking for 75 a pair . These r matched pairs and all been tested before I made this ad. Happy tube hunting ! MpU near broadway n pearl district thx again if u got to the end. I tend to rant when I love a certain product. Let me know!