Boss SD-1 with Keeley Mod

The Boss SD-1 with Keeley Mod: From Smooth Overdrive to Hard-Rocking Distortion

Classic Overdrive with Modern Upgrades

The Boss SD-1 with Keeley Mod takes the legendary SD-1 overdrive and transforms it into a hard rocker's ultimate tool. Sitting between the smooth tones of the BD-2 Blues Driver and the aggressive DS-1 Distortion, the Keeley-modified SD-1 is more versatile than ever. With upgraded components and enhanced circuitry, it delivers a range of tones from classic overdrive to distortion-level gain, perfect for players who need both precision and power.

Enhanced Gain and Germanium Clipping

Keeley's upgrades make the SD-1 a more open and dynamic TS-style overdrive while retaining its signature character. The addition of a toggle switch brings a germanium diode into the clipping circuit, creating a harder drive with increased compression. This feature allows players to explore a broader range of textures, from subtle warmth to searing leads, making it ideal for everything from blues to hard rock.

True Bypass and Premium Components

All components throughout the pedal have been upgraded for improved sound quality and reliability. True bypass switching ensures your signal remains pure and unaffected when the pedal is disengaged. These enhancements make the SD-1 with Keeley Mod a professional-grade addition to any rig.

Versatile and Expressive

With its increased gain range and tonal flexibility, the Keeley-modded SD-1 offers exceptional versatility. It excels as a standalone overdrive or as a boost to drive an amp harder. Whether you're playing rhythm or lead, this pedal's expressive dynamics and responsive controls give you complete mastery over your tone.

Built for Modern Players

The Boss SD-1 with Keeley Mod maintains the robust construction and intuitive layout of the original while elevating it to new levels of performance. Its upgraded features and high-quality components make it a reliable choice for guitarists looking to expand their tonal palette.

Specifications

• Type: Overdrive
• Modifications:
  • Germanium diode toggle for enhanced clipping and compression
  • True bypass switching
  • Upgraded components throughout
• Controls: Standard SD-1 layout with added clipping toggle

This pedal works nicely as intended and is in excellent condition, exhibiting only very gentle external wear as can be seen in photos. Original box is included.

This pedal ships fully insured with a signature required for delivery.