Say It Ain't So amp settings — Fender Mustang LT25

The Weezer guitar tone for “Say It Ain't So”, dialed in for a Fender Mustang LT25 with a Fender Jazzmaster. Studio version, Weezer (Blue Album) 1994 — iconic clean verse riff

Original rig

Fender Twin Reverb, Gibson Les Paul with humbuckers, no pedals for the clean verse tone

Warm, round clean with subtle compression, mid-forward clarity, slight room verb, chimey but not brittle

Amp settings — Fender Mustang LT25

CHANNELClean (Fender '65 Twin Reverb model)BRIGHToffBOOSToff

Knob	Setting (0–10)
Gain	2
Bass	5
Mid	7
Treble	5
Reverb	3
Master	6

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Guitar

PICKUPneck TONE7 VOLUME10

Why these settings

Original used a Twin Reverb with warm humbucker Les Paul. Your Jazzmaster single-coils are brighter and thinner, so treble drops from 6.5 to 5 and mid pushes to 7 to recover body. The LT25's '65 Twin model nails the Fender clean headroom — keep gain at 2 for that pillowy clean, not breakup. Neck pickup with tone rolled to 7 warms the Jazzmaster's jangle toward humbucker territory.

PRO TIPUse your picking hand closer to the neck joint and pick lightly — Rivers' clean tone on this track has a soft attack that lets the notes bloom rather than snap, which matters more than any knob.

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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Song, artist and gear names are used to identify the tone being matched; ToneAdapt is not affiliated with or endorsed by the artists or manufacturers mentioned. Settings are AI-generated starting points — trust your ears.