Heart-Shaped Box amp settings — Fender Mustang LT25
The Nirvana guitar tone for “Heart-Shaped Box”, dialed in for a Fender Mustang LT25 with a Ibanez RG550. Studio version, In Utero (1993) — main heavy chorus riff
Univox Hi-Flier / Fender Mustang + Tech 21 SansAmp Classic into Fender Quad Reverb / Marshall Studio 15
| Knob | Setting (0–10) |
|---|---|
| Gain | 7 |
| Bass | 6 |
| Mid | 7 |
| Treble | 6 |
| Reverb | 0 |
| Master | 5 |
01ROCK DIRT
Onboard stomp block emulating the SansAmp/distortion bite
The 90S ROCK model captures the aggressive, saturated core of In Utero while the onboard ROCK DIRT block emulates the jagged edge of Cobain's SansAmp Classic. The Ibanez V8 bridge humbucker has plenty of output, so keeping gain around 7 avoids over-saturating into mush. Clean verse: bypass the ROCK DIRT stomp block and engage the onboard CHORUS block. Middle has no knob on the LT25: press the encoder to open the preset, press it again on the amp model, then select MIDDLE on the display and turn the encoder.
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These settings are for a Fender Mustang LT25. ToneAdapt matches any song to whatever amp, guitar and pedals you own — first match is free.
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