Guitar-Rigs.com

Nirvana's guitarist and frontman almost single-handedly reignited heavy rock guitar in the early ’90s—wrestling it bodily from a plethora of electronic dance-pop and indie bands that were afraid of guitar solos—and did so on a range of unlikely rigs. Cobain used a wide range of guitars and never seemed very particular about choice, except that he generally preferred Fenders (having said it was because they were light), and needed guitars that were either factory left-handed, or could be easily adapted. There were a few instruments he used fairly consistently, however, none of which would normally be associated with the enormous sound that defined grunge of the period: a ’60s Fender Mustang with its standard, low-output single-coil pickups, was his favorite guitar throughout the Nevermind period, and he also frequently used a Jaguar after that. Never considered a rock player's choice, versions of the latter did appear modified with humbucking replacement pickups for a little more oomph. Cobain's favorite amp, a Twin Reverb, was equally incongruous for the sounds he created, although he did kick this super-clean country twanger into overdrive with a range of pedals, including a Boss DS-1 Distortion, a Boss DS-2 Turbo Distortion, and an Electro-Harmonix Big Muff, while adding swirl and dimension from an E-H Small Clone, Polychorus, and Echo Flanger.

From Gibson.com