Boss SD-1 Super OverDrive vs Keeley Super AT Mod Overdrive Limited Edition
The Boss SD-1 Super OverDrive and the Keeley Super AT Mod Overdrive Limited Edition are both pedals sharing harmonically rich, dynamic. The Boss SD-1 Super OverDrive leans edge of breakup and warm. The Keeley Super AT Mod Overdrive Limited Edition leans transparent. Current prices: $59 vs $259.74.
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Blended from circuit-archetype lineage, dynamic feel, tone-signal overlap and tone-vector distance — the tone vector itself is derived from editorial description text, not a measured acoustic signal, so this reflects how similarly the catalog copy describes the two, not a lab measurement. Shown only within a gear class, and only where there's enough evidence to be meaningful.44% — somewhat different
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Genres both listings are associated with.- Rock
- Blues
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Derived from overlapping tonal signals across both listings.- harmonically rich
- dynamic
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Citation/mention fame — how often this gear is cited across artist rigs and gear discussion.$59via Reverb
$259.74via Reverb
The Boss SD-1 Super Overdrive is a long-running and affordable overdrive introduced in 1981, built around an asymmetrical clipping circuit that distinguishes it from the symmetrical Tube Screamer family. The asymmetrical diodes clip each half of the waveform differently, adding even-order along with odd-order harmonics for a slightly grainier, more aggressive, and harmonically rich voice with a touch more body and output. It shares the mid-pushed character that helps notes cut through a band, but feels closer to real tube-amp breakup, especially when pushing an already clean amp. Players use it as a low to medium gain drive or as a boost stacked into a dirty amp or another pedal. Used by Zakk Wylde, Josh Homme, and countless others, it suits blues, rock, and metal rhythm and lead work.
The Keeley Super AT Mod Overdrive is a limited-edition premium modification of a Tube Screamer-style overdrive circuit by Robert Keeley, incorporating signature AT (Andy Timmons) circuit modifications that extend the tonal range and improve harmonic character beyond the stock circuit. The AT modifications address specific Tube Screamer limitations including bass response and clipping character, producing a more natural, harmonically complex overdrive suited to expressive blues and rock lead playing.
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Genres this gear is documented as being used in.- Metal
- Alternative Rock
- Classic Rock
- edge of breakup
- warm
- transparent