this doesn't specifically mention the reverb, but you may find it interesting, nonetheless:
Recording of 'Nevermind'
"Nevermind" was recorded at Sound City, Van Nuys and Devonshire, North Hollywood studios. It was produced by Butch Vig and NIRVANA. With the monetary advance for recording the album the band had more money to choose equipment; Kurt bought "a bunch" of guitars and effects from Guitar Maniacs.
The guitars used were his competition Mustang, his Jaguar, and a new Stratocaster(s) with humbuckers in the bridge positions. Kurt purchased a bunch of Japanese Strats (had humbuckers installed in the bridges) and effects for this album from Rick King of Guitar Maniacs. Just prior to recording this album Kurt apparently developed a taste for Fender guitars. It has been said his main amp was a Mesa/Boogie Studio .22 but the recording setup was really similar, if not identical, to his upcoming live setup (purchased before entering the studio): Mesa/Boogie Studio Preamp with a Crown power amp and a variety of Marshall cabinets. In live performances, his Crown power amp was eventually replaced with 2 Crest power amps, discussed in the "Amplification" section. He also used
a Fender Bassman on about four songs and
a Vox AC30 for some clean tracks. Four microphones were used to mic Kurt's speaker cabinet (he would pick which mic he liked best for each song and its signal was sent through the Neve console at Sound City):
a Shure SM57, an AKG 414,
a Neumann U87, and occasionally a Sennheiser 421. His main effects were
the DS-1 Distortion and Small Clone.
A ProCo Rat distortion pedal was also used on some songs on the album.
According to Vig, the Small Clone was the key to "the watery guitar sound you hear on the pre-chorus build-up of 'Smells Like Teen Spirit' and also 'Come As You Are.'"
An Electro-Harmonix Big Muff fuzz box was used on "Lithium" for that "dark, thumpier sound." Vig recalls using the U87 mike on "Lithium" because it wasn't so bright and had a heavier sound.
"Polly" was recorded at Vig's Smart Studios in Madison, Wisconsin during demo sessions for "Nevermind" with his 12-string Harmony Stella. It only had 5 nylon strings on it that were never changed. Tuned down about a step and a half from E and recorded with an AKG 414 microhone (See "Guitars" section).
Tour Gear Summary
"Nevermind"-era: Initially only the 1965 Jaguar, '69 Mustang, and Japanese strats for guitars; later the sunburst Tele painted blue. Univoxes continually used occasionally. Dean Markley .010-.052 guitar strings and orange Dunlop picks. Mesa/Boogie Studio preamp, Crown power amp (evetually replaced with 2
Crest 4801 power amps), Marshall cabs (predominant speakers of this tour were Celestion 75's. Also tried a rackmounted wireless system for a bit.
Boss DS-1 and the Small Clone chorus. Basically the same setup used for recording "Nevermind." Nick Close said everybody had the exact amount of things needed to play a show. If anything broke, they were in trouble. He tried to get them to have extra cords and pedals. Nick was always looking for a backup for his DS-1 (which opposes what Kurt said about going through 5 a tour). One time when the Crown blew up it took the speakers with it; Nick (and Kurt?) was in a music store looking for Marshall cabs and he saw the DS-2 and bought it. Kurt didn't seem to like it at first but then started using it after he broke his DS-1 in Hawaii. Nick got a small supply of replacement necks for Kurt's strats but soon he was replacing necks every night. He contacted Danny Ferrington in Los Angeles in late December of '91 to make replacement necks, but Danny instead offered to make a whole new guitar (the Ferrington). He also got
an Echoflanger from Guitar Maniacs for $99 around this time.