Aaron Rash has taken his Nirvana gear journey to a whole new level: he's built the 'Frankenamp' Kurt Cobain used that's the final part in the In Utero tone puzzle

Aaron Rash.

I recently talked in-depth with Aaron Rash about his YouTube videos investigating Kurt Cobain's Nirvana guitar tones and the plans he has for some exciting products for other players. But there's been a development since then – and it's a big one. Aaron is now the owner of the Frankensteined tube amp Cobain used for some of the clean tones on In Utero, that was originally rescued from a dumpster.

After his previous videos looked at the Steve Albini-owned aluminum guitar, pedals and the rare Fender Quad Reverb amp that are key elements of In Utero's guitar sounds, there was still a missing piece of the puzzle when it came to the cleans. Now, with the help of Cobain's guitar tech Earnie Bailey, Aaron has it.