Upscale Audio

mullard new production 12at7 / ecc81

electro-harmonix 12ay7 / 6072a

mullard new production cv4004 / 12ax7

gold lion ecc81 / b739 / 12at7

tung-sol 12at7

tung-sol 12ax7 / ecc803-s gold pin

tung-sol 12au7w / 6189

electro-harmonix 6h30pi gold pin

electro-harmonix 6922 gold pin

tung-sol 6sn7gtb

sovtek 6h30pi

electro-harmonix 6sn7

western electric 300b vacuum tube

mullard 6bq5 / el84 new production

tung-sol el34b

electro-harmonix kt90

tung-sol kt150

electro-harmonix 300b gold grid

russian 6as7g / 6n13s

sovtek 5881