Kurt Cobain’s Mesa/Boogie Studio .22 Preampaccess_time First seen circa 1990
This was Kurt main pre-amp, used for live performances ever since May 2, 1990. According to several sources, Kurt trashed his Sunn amps the day earlier, on May 1st at the Cat’s Cradle, Chapel Hill, NC, and bought the Mesa Boogie on May 2nd before playing at Milestone in Charlotte.
I was at this show and bought one of Kurt’s Beta Leads.Nirvana – 5/1/90 – Cat’s Cradle, Chapel Hill, NC – comments, S.Williams
Nirvana plays two shows in North Carolina: May 1 is in Chapel Hill an May 2 is at Milestone in Charlotte, where Kurt buys a new guitar amp. […] His guitar amp crapped out and we had enough money to go to a music store and buy him another Mesa Boogie, a fairly nice setup…that he used the whole rest of the time.Craig Montgomery – Nirvana: The Day by Day Eyewitness Chronicle, Thunder’s Mouth Press 2000, p. 57 by Carrie Borzillo
From that point on, the Mesa Boogie was used for the entirety of Nevermind and In Utero tours. During most of the Nevermind tour, the preamp was paired with a Crown Power Base 2 power amp. This setup was used until around January 1992, when Kurt kept the Mesa Boogie but switched to a duo of Crest 4801 power amps.