Black Betty amp settings — Fender Mustang LT25

The Ram jam guitar tone for “Black Betty”, dialed in for a Fender Mustang LT25 with a Epiphone Les Paul Classic. Studio version, Ram Jam (1977) — main driving rhythm riff

Original rig

Modified 1954 Gibson Les Paul Goldtop (Gibson embossed humbuckers) into cranked Marshall JMP 50W 2x12 combo / 1960s blonde Fender Twin Reverb into Marshall 4x12 cab

Aggressive 70s hard-rock British crunch with punchy midrange bark and tight low-end snap

Amp settings — Fender Mustang LT25

CHANNEL70S ROCK amp model

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

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Guitar

PICKUPbridge TONE10 VOLUME10

Signal chain

01SMALL ROOM

Set via encoder in preset REV block for subtle 70s studio room ambience

Decay 3 · Mix 2

Why these settings

Bill Bartlett tracked the iconic riff using a heavily modified Les Paul through a cranked vintage Marshall JMP/Super Lead circuit. The Mustang LT25's 70S ROCK model reproduces that late-60s/70s Marshall EL34 midrange bark and speaker breakup directly from the amp model. Pushing the internal mid setting to 7 while keeping bass around 5 prevents the 8-inch practice speaker from muddying up during the fast pentatonic gallops. 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.

PRO TIPDig in hard with a stiff pick directly over the bridge pickup; the percussive attack of the Black Betty riff relies heavily on sharp string-muting and fast pick transients rather than massive preamp gain.

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.