Song Rig

Black Hole Sun

Kim Thayil · Superunknown · 1994

Tone Overview

What Makes This Sound Unique

Psychedelic, whammy-bar-heavy and detuned — the opening riff uses heavy tremolo arm dips to create the lurching, unstable quality. Kim Thayil uses a reverse headstock guitar through a high-gain amp for the main riff, while the chorus opens into a cleaner, more spacious texture. The overall tone is dark, unusual, and heavily processed.

Signal Chain

1Fernandes Ravelle (or ESP guitar with reverse headstock)
2Marshall JCM800 (or Mesa Boogie)
3whammy bar (critical for intro riff)
4heavy reverb on chorus sections

Amp Settings

Gain / Volume7

Bass7

Mid5

Treble6

Presence5

Reverb5

Moderate-high gain with scooped mids for the main riff — the psychedelic quality comes from the whammy bar technique rather than the amp EQ. Heavy reverb on the chorus sections opens up the texture. The A# standard (Bb) tuning adds extra darkness to every note.

Technique

How to Play It

Whammy bar dips at the end of held notes — Thayil dips the bar immediately after picking a note to create the "falling" pitch effect that defines the intro riff. Not a slow vibrato but an aggressive single dip. Combined with the down-tuning, the effect is profoundly unsettling.

Budget Alternative

Achievable With

Any guitar with a tremolo arm → high-gain amp (Marshall JCM800 or equivalent) → practice the whammy-bar dip technique. The tuning matters — tune down to A# standard or use a drop tuning for the correct pitch register.

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