Inspired by the rack-mounted Marshall JMP-1 preamp, the Colombo Audio The One aims to make its iconic tones accessible without complex setups. It delivers a practical tonal tool for players seeking vintage-voiced high gain with studio-grade EQ flexibility.
Rather than a direct clone, the circuit reimagines the JMP-1’s signature tones—beloved in rock and beyond—for modern guitarists seeking classic Marshall-style drive in a simple, analog pedal.
Key Features:
- Two distinct modes: Lead 1 (warm, sharp mids at 800Hz) and Lead 2 (airy, vocal-like mids at 1kHz) for versatile high-gain sounds.
- Hybrid op-amp/JFET circuitry delivers tube-like dynamics and response.
- Advanced Tone control behaves like a parametric EQ, offering nuanced shaping beyond standard treble/bass adjustments.
- Middle control sculpts midrange character—neutral at noon, scooped when lowered, or thickened when raised.
- True bypass for transparent signal integrity when disengaged.
