Take your home audio system to the next level with this modified Nobsound E6 Tube Preamp. This preamp boasts custom upgrades and features direct heated triode vacuum tubes for superior sound. With class A amplifier topology and a separate linear power supply, this preamp offers exceptional audio quality that usually costs much, much more.Modifications include replacing the stock Chinese tubes with new old stock (NOS) Russian originals and replacing the original electrolytic capacitors with Dayton Audio audio grade film capacitors. I further include a linear power supply by BRZHIFI as well as a spare set of tubes.Here is what this setup would cost you if you did it yourself (plus an hour to change the caps):- Nobsound E6: ~$50 on AliExpress- NOS Russian tubes (4x): ~$40 on eBay- Film capacitors: ~20 on PartsExpress- Power supply: ~$50 on AliExpress (or more if you like)If you, like me, are a fan of Randy the CheapAudioMan, the Nobsound is right up your alley. I am only selling it because I just upgraded to a vintage preamp that won Stereophile product of the year in the 90s, so yeah…