Dirty Shirley doesn't just flirt with tone—she delivers it. Sultry, sassy, and unapologetically rich, this boutique overdrive channels the soul of a vintage tube amp with dynamic response and tonal range that's anything but shy. From smoky blues to gritty rock, Shirley's got the curves and the control to shape your sound with precision and punch.

• Boutique amp-style overdrive with British-American flavor
• Six-knob layout: Volume, Gain, Bass, Treble, Presence, Tight switch
• Responsive to guitar volume and playing dynamics
• True bypass, runs on 9V–18V for added headroom
• Internal gain trim pot for deeper saturation control
• Clean condition with Velcro on bottom—ready for pedalboard deployment
• No box or documentation included
• Made in USA