Surprisingly, Thayil has no GuitarGeek entry... I find that disgraceful.
Wikipedia offered the following info:
Early years
Guitars: Guild S-100
Amplifier: Bass Ampeg mesa boogie w/15" speaker
Effects: Jim Dunlop Crybaby wah, MXR chorus
Badmotorfinger
Guitars: Guild S-100, Gibson Les Paul Custom Lite, Gibson Firebird
Amplifiers: Peavey VTM-120, Music Man HD130, Mesa Boogie Dual Rectifier
Effects: To get the heavy sound in studio, many guitar tracks were layered and panned to add the body that was lacking from previous albums.
Superunknown
Guitars: Guild S-100, Gibson Les Paul, Fender Telecaster, Gibson SG
Amplifiers: Mesa Boogie Dual Rectifiers, Mesa Boogie 50-watt Mavericks, an old Fender Super, a Fender Princeton, Fender Twin Reverbs and Vibro-Kings, and an old Orange head.
Effects: Intellitronics LA-2 and Summit DIs. (To get him to play most comfortably, Thayil's living room couch was brought into the studio, as per an article published in the May 1994 issue of Guitar World)
Down on the Upside
Guitars: Guild S-100, Diet Gibson Les Paul, Fender Telecaster, Fender Jazzmaster, Gibson SG.
Amplifiers: Mesa Boogie Dual Rectifiers
Effects: Jim Dunlop Crybaby wah, Colorsound wah, Jim Dunlop Rotovibe, Mu-Tron
...and if you don't like it, you can suck on an egg.
"I'll tell you what: If all I had was Pearl Jam, and I didn't have another band in the world, I would not be worried. Because in there is the essence of making great music. You don't have to use it all at once, but it's there." - Neil Young
Comments
Wikipedia offered the following info:
Early years
Guitars: Guild S-100
Amplifier: Bass Ampeg mesa boogie w/15" speaker
Effects: Jim Dunlop Crybaby wah, MXR chorus
Badmotorfinger
Guitars: Guild S-100, Gibson Les Paul Custom Lite, Gibson Firebird
Amplifiers: Peavey VTM-120, Music Man HD130, Mesa Boogie Dual Rectifier
Effects: To get the heavy sound in studio, many guitar tracks were layered and panned to add the body that was lacking from previous albums.
Superunknown
Guitars: Guild S-100, Gibson Les Paul, Fender Telecaster, Gibson SG
Amplifiers: Mesa Boogie Dual Rectifiers, Mesa Boogie 50-watt Mavericks, an old Fender Super, a Fender Princeton, Fender Twin Reverbs and Vibro-Kings, and an old Orange head.
Effects: Intellitronics LA-2 and Summit DIs. (To get him to play most comfortably, Thayil's living room couch was brought into the studio, as per an article published in the May 1994 issue of Guitar World)
Down on the Upside
Guitars: Guild S-100, Diet Gibson Les Paul, Fender Telecaster, Fender Jazzmaster, Gibson SG.
Amplifiers: Mesa Boogie Dual Rectifiers
Effects: Jim Dunlop Crybaby wah, Colorsound wah, Jim Dunlop Rotovibe, Mu-Tron
http://web.stargate.net/soundgarden/images/gui0494b.jpg