The Keeley Electronics Super Rodent SD-1 x Rat Overdrive / Distortion is a 4-in-1 Series pedal whose name points to the two gain circuits it draws on, the Boss SD-1 overdrive and the ProCo Rat distortion, built into a single enclosure. It is listed at $199 in the US, with a UK price of £1991.
What it does
The pedal pairs the SD-1 and Rat circuits with switchable tone stacks and clipping characters, giving four combinations in one box. The controls are Tone, a Tone Stack switch that selects between the SD-1 and RAT voicings, Drive, a Drive Clipping switch that selects Soft or Hard clipping, and Level2. Guitar World described the series as each pedal offering "two classic circuits and two hybrid modes"3.
The Tone Stack switch is the pedal's distinguishing control: it lets the SD-1's tone shaping run into the Rat's hard clipping, or the Rat's voicing run into the SD-1's softer clipping. Stefan Karlsson of Guitar Pedal X highlighted that combination2:
"I love the SD-1 Tone Stack on the Rat Clipping - that delivers a more vibrant and full-on tone"
How it compares within the series
The Super Rodent sits in Keeley's 4-in-1 Series, a line whose pedals pair two gain circuits in one enclosure, and it carries the same list price as its siblings at $199 in the US and £199 in the UK1.
Videos
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Keeley Electronics
Keeley Electronics
Sources (3)
- Guitar Pedal X, Guitar Pedal X
- Guitar Pedal X, Guitar Pedal X, 2024-08-30
- Keeley's 4-in-1 Series replicates classic circuits that can be mismatched to “Frankenstein monster tones”, guitarworld.com, 2024-03-13
