Boss SD-1 Super OverDrive vs Keeley Super Phat Mod

The Boss SD-1 Super OverDrive and the Keeley Super Phat Mod are both pedals sharing mid-forward, harmonically rich. The Boss SD-1 Super OverDrive leans edge of breakup and warm. Current prices: $59 vs $126.65.

Similarity
citedBlended 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.

41% — somewhat different

Shared genres
citedGenres both listings are associated with.
  • Blues
Shared tone character
citedDerived from overlapping tonal signals across both listings.
  • mid-forward
  • harmonically rich
Citation fame
citedCitation/mention fame — how often this gear is cited across artist rigs and gear discussion.
0%
17%
Price

$59via Reverb

$126.65via Reverb

Description

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 Phat Mod is a symmetrical-clipping overdrive built around Robert Keeley's signature "Phat" modification, enhancing low-end response and body compared to a standard Tube Screamer-style circuit. Unlike the asymmetrical-clipping Super AT Mod, the Super Phat Mod uses symmetrical clipping similar in family to the BD-2 Blues Driver, giving it a different compression and harmonic character focused on a fuller, phatter overdrive tone.

Genres
citedGenres this gear is documented as being used in.
  • Metal
  • Rock
  • Alternative Rock
  • Classic Rock
  • Electronic
Tonal lean
  • edge of breakup
  • warm
  • dynamic
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Boss SD-1 Super OverDrive vs Keeley Super Phat Mod — Shared Character & Differences — NodeTone