
Aaron Rash, the YouTuber and Nirvana tone guru, has solved a mystery that has plagued him for four years – he has identified the electric guitar that Kurt Cobain used on Heart-Shaped Box.
Over the past few years, Rash has gone deep into the rabbit hole in search of Cobain’s tone secrets – particularly on Nirvana’s final studio album, In Utero. Rash has built his own guitars, swapped out speakers. He even got Cobain’s tech Earnie Bailey to help him build the Frankenamp that was used on the recording.