Breed amp settings — Fender Mustang LT25

The Nirvana guitar tone for “Breed”, dialed in for a Fender Mustang LT25 with a Ibanez GIO GRG170DX. Studio version, Nevermind (1991) - Main Riff

Original rig

Fender Mustang/Strat with bridge humbucker -> ProCo Rat / Boss DS-1 -> Mesa/Boogie Studio Preamp + Crown Power Base 2 into Marshall 4x12 cab

Raw, raspy, mid-heavy punk distortion with aggressive pick attack

Amp settings — Fender Mustang LT25

CHANNELMetal 2000 amp modelBOOSToff

Knob	Setting (0–10)
Gain	7
Bass	5
Treble	7
Reverb	0
Master	6

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Guitar

PICKUPbridge TONE10 VOLUME10

Signal chain

01Onboard Myth Drive / Overdrive Stomp Block

Enable the onboard overdrive block in the LT25 preset signal chain to simulate the front-end boost of Cobain's DS-1/Rat into the Mesa preamp

Gain 4 · Tone 7 · Level 8

Why these settings

The Fender Mustang LT25 uses the high-gain 'Metal 2000' model (Mesa-style voicing) to recreate the Studio Preamp distortion without external pedals. The amp's faceplate lacks a physical mid and presence control, so mids are pushed via the onboard stomp block while treble is elevated to capture the raw, biting rasp of the original mix. Keep reverb completely off for the bone-dry, in-your-face grunge rhythm track.

PRO TIPHit the strings aggressively with a heavy downstroke motion close to the bridge using a thin or medium nylon pick to emulate Kurt's snappy, percussive string rattle.

Get this tone on your amp

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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