Description
The Dirty Little Secret isn’t a two-channel pedal—it’s two completely different amps living in one enclosure, selectable via an internal slider switch. Catalinbread rebuilt the tone stack and gain staging for each mode rather than just tweaking a knob, so switching between them genuinely changes how the pedal reacts to your playing.
- Super Lead mode chases the roar of a Marshall Super Lead: thumping low end, upper-midrange snarl, and the harmonic complexity that makes plexi amps so touch-sensitive. Gain runs from clean plexi crunch up to JCM800-style saturation, and rolling back your guitar’s volume knob takes you from polite to screaming without losing clarity. Pairs especially well with humbucker-loaded guitars.
- Super Bass mode channels the Marshall Super Bass—kin to the JTM45 and early JTM50/100 circuits—with deeper bass response and lower-midrange emphasis instead of upper-mid bite. It sits in that hard-to-nail zone between clean and dirty that vintage tube amps did so well, and it’s tailor-made for stacking fuzz in front—especially two-transistor fuzzes like a Fuzz Face. Run a Strat into a Fuzz Face ahead of this mode and you’ll hear exactly why.
Because the tone stack itself reconfigures between modes—not just adds bass—the treble, middle, and bass controls behave like the actual amp circuits they’re modeled after. Place it early in your chain as your dirt foundation, or use it to color a clean amp with real Marshall character.






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