Researched rig70% confidence

About a Girl guitar tone

Nirvana

Big blackface Fender headroom switched to dirt by a cheap orange distortion pedal, through a sealed 2x12

Tempo
122 BPM
On the record

The rig Nirvana used

Researched from interviews, production write-ups and gear histories — not guessed.

Guitar

Univox Hi-Flier, left-handed, with its stock Univox humbuckers

Amplifier

Jack Endino's 1968 Fender Twin Reverb, run as a head because its own speakers were blown

Microphone

Cobain's sealed-back 2x12 with 70- or 75-watt Celestions, close-miked with a Shure SM58

Signal flow

Signal chain

The order the original sound was built in. The exact settings get dialled for your own amp or modeller when you generate the tone.

  1. Univox Hi-Flier

    1

    Cobain's cheap Mosrite-copy solidbody, the guitar he played throughout the Bleach sessions.

    guitar
  2. Boss DS-1 Distortion

    2

    Attributed distortion-pedal recreation; historical section schedule and sole-source claim unverified.

    drive
  3. 1968 Fender Twin Reverb

    3

    The amplifier: Jack Endino's own Twin, borrowed for the album and run as a head.

    amp
  4. Closed-back 2x12 with Celestions

    4

    Cobain's own cabinet, which is what the borrowed Twin was actually plugged into.

    cab
  5. Shure SM58

    5

    Close SM58 on the cabinet; exact geometry unknown.

    mic

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Evidence

Why we think this is right

For the original Bleach studio recording, engineer Jack Endino identifies Cobain's left-handed Univox with stock humbuckers, Endino's 1968 Fender Twin used as a head into Cobain's sealed 2x12 with 70/75-watt Celestions, and a close SM58. Endino named a Boss DS-1 in the 1997 interview; his own FAQ is less certain between DS-1 and DS-2, so DS-1 is retained as the stronger attribution rather than absolute title proof. Exact pickup position, controls, pedal switching, amp movement, speaker model, microphone geometry, overdub allocation and post-processing are not documented. Existing scenes and values remain inferred reconstruction.

Sources

  • https://www.endino.com/archive/arch9-1.html
  • https://www.guitarworld.com/features/the-definitive-kurt-cobain-gear-guide
  • https://www.prosoundweb.com/in-the-studio-an-interview-with-grunge-pioneer-jack-endino/
  • https://guitar.com/features/artist-rigs/the-guitar-gear-used-on-bleach-by-nirvana/
  • https://www.livenirvana.com/sessions/studio/december-1988.php
  • https://www.musicnotes.com/sheetmusic/nirvana/about-a-girl/MN0083046
  • https://www.musicnotes.com/sheetmusic/nirvana/about-a-girl/MN0083044
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