The ProCo Lil Rat is a Proco distortion pedal, currently around $88. Close alternatives include the Peavey Rock Master Preamp and the Catalinbread CB-Distortion. It pairs well with the Friedman Dirty Shirley and the Peavey Invective 120.

ProCo Lil Rat

Proco · pedal

The ProCo Lil' Rat packs the full ProCo Rat 2 circuit into a micro-sized enclosure, using identical components to deliver the same range of tones that have defined the Rat lineage for decades, from smooth low-gain overdrive through gritty crunch to aggressive, fuzz-like saturation. Distortion, Filter, and Volume controls work exactly as on a full-size Rat, with the Filter knob cutting high frequencies as it's turned clockwise to darken or brighten the tone. It excels at arena-rock rhythm tones and soaring leads, working equally well with single coils and humbuckers. It suits players wanting the complete classic Rat distortion character in a crowded-pedalboard-friendly footprint rather than a scaled-down or simplified version.

What stands out

  • “LM308-based distortion with the Rat's distinctive aggressive character suits rock, punk, and indie applications”

    — from the reviews

  • “The ProCo Lil' Rat packs the full ProCo Rat 2 circuit into a micro-sized enclosure, using identical components to deliver the same range of tones that have defined the Rat lineage for decades, from smooth low-gain overdrive through gritty c…”

    — from the listing

  • “Rock, punk, and alt players who want the Rat's distinctive tone in compact format find the Lil Rat a practical option”

    — from the community notes

  • “ProCo's compact Rat, providing the classic Rat distortion character in a smaller enclosure”

    — from the community notes

  • “Distortion, Filter, and Volume controls work exactly as on a full-size Rat, with the Filter knob cutting high frequencies as it's turned clockwise to darken or brighten the tone”

    — from the listing

Trade-offs

  • “proco build quality is solid and road-worthy”

    — from the community notes

  • distortion
  • aggressive
  • rock
  • punk
  • gritty
  • low gain
  • crunch
  • smooth

Price updated Oct 24, 2026

Genres the ProCo Lil Rat is commonly used in

  • Rock
  • Indie
  • Punk
  • Metal
    citedInferred from shared tonal signals, not a stated genre tag.
  • Pop Punk
    citedInferred from shared tonal signals, not a stated genre tag.
  • Grunge
    citedInferred from shared tonal signals, not a stated genre tag.

Amps that pair well with the ProCo Lil Rat

Friedman Dirty Shirley

Friedman

24% match

gain stackingStacks two gain stages for more saturation than either produces alone. (low gain → high gain)

Friedman Dirty Shirley leans this low gain tone toward high gain, which it doesn't make on its own

Comes later in the signal chain

Peavey Invective 120

Peavey

22% match
$999.99via Reverb

gain stackingStacks two gain stages for more saturation than either produces alone. (low gain → high gain)

Peavey Invective 120 leans this low gain tone toward high gain, which it doesn't make on its own

Comes later in the signal chain

Synergy SL2 Module

Synergy

tonal match

Comes later in the signal chain

Into a low gain tone, Synergy SL2 Module brings a pull toward high gain that's missing

Ceriatone 2202H

Ceriatone

tonal match

Comes later in the signal chain

Into a low gain tone, Ceriatone 2202H brings a pull toward high gain that's missing

Ceriatone HRM 50

Ceriatone

tonal match

Comes later in the signal chain

Feed a crunchy signal into Ceriatone HRM 50 and it comes out closer to mid-forward

Ceriatone Overtone Special HRM Bluesmaster 50

Ceriatone

tonal match

Comes later in the signal chain

Ceriatone Overtone Special HRM Bluesmaster 50 takes that crunchy character and pushes it toward mid-forward

EVH 000

Evh

tonal match

Comes later in the signal chain

EVH 000 leans this low gain tone toward high gain, which it doesn't make on its own

Mesa/Boogie JP-2C John Petrucci Signature 60/100-Watt

Mesa Boogie

tonal match

Comes later in the signal chain

Mesa/Boogie JP-2C John Petrucci Signature 60/100-Watt leans this low gain tone toward high gain, which it doesn't make on its own

Pedals that stack with the ProCo Lil Rat

Walrus Audio EB-10 Black Edition

Walrus Audio

25% match
$199.99via Reverb

pushes an already-dirty tonePushes an already-dirty tone harder and tightens it up. (crunchy → clean boost)

Walrus Audio EB-10 Black Edition takes that crunchy character and pushes it toward clean boost

Comes earlier in the signal chain

MXR Micro Amp

MXR

24% match
$76.40via Reverb

pushes an already-dirty tonePushes an already-dirty tone harder and tightens it up. (crunchy → clean boost)

MXR Micro Amp takes that crunchy character and pushes it toward clean boost

Comes earlier in the signal chain

Caroline Guitar Company Parabola State Tremolo

Caroline Guitar Company

19% match
$215.59via Reverb

sits in the right chain slotPlaced for where it does its job cleanly in the chain, not for a tonal interaction with the anchor.

Put Caroline Guitar Company Parabola State Tremolo after ProCo Lil Rat in the signal chain, clear of ProCo Lil Rat's own gain stage

Comes later in the signal chain

Wampler Cory Wong

Wampler

17% match
$265.93via Reverb

shapes the dynamic responseShapes how the tone responds to picking dynamics rather than its frequency or gain.

What ProCo Lil Rat brings here leans toward aggressive — that's worth building a pairing around

Comes earlier in the signal chain

Walrus Audio Mako D1 High-Fidelity Stereo Delay V1

Walrus Audio

10% match
$269via Reverb

sits in the right chain slotPlaced for where it does its job cleanly in the chain, not for a tonal interaction with the anchor. (fuzzy → modulated)

Keep Walrus Audio Mako D1 High-Fidelity Stereo Delay V1 after ProCo Lil Rat in the signal chain, clear of ProCo Lil Rat's own gain stage — goes in the amp's FX loop (or last, into a clean amp)

Comes later in the signal chain

Electro-Harmonix Memory Boy Analog Delay

Electro-Harmonix

10% match
$104.54via Reverb

sits in the right chain slotPlaced for where it does its job cleanly in the chain, not for a tonal interaction with the anchor. (fuzzy → modulated)

Electro-Harmonix Memory Boy Analog Delay's analog warmth voice goes after ProCo Lil Rat in the signal chain — it's not there to compete with ProCo Lil Rat's own aggressive character — goes in the amp's FX loop (or last, into a clean amp)

Comes later in the signal chain

NuX Drive Core Deluxe

Nux

tonal match
$74via Reverb

Comes earlier in the signal chain

NuX Drive Core Deluxe leans this low gain tone toward high gain, which it doesn't make on its own

Matthews Effects Architect

Matthews Effects

tonal match

Comes earlier in the signal chain

Matthews Effects Architect leans this low gain tone toward high gain, which it doesn't make on its own

Cheaper alternatives

Boutique & premium upgrades

Similar charactersee all similar tone character →

See all alternatives to the ProCo Lil Rat (cheaper + boutique) →

Questions people ask

What are good alternatives to the ProCo Lil Rat?+

The closest matches in character are the Peavey Rock Master Preamp, the Catalinbread CB-Distortion, the MXR M193 GT-OD Overdrive. Budget picks: SONICAKE Shark, T-Rex Nitros, TC Electronic Grand Magus Distortion. Boutique upgrades: Dunlop MXR Dookie Drive 30th Anniversary DD30, Maxon SD-9 Sonic Distortion, Black Arts Toneworks Forest.

What pairs well with the ProCo Lil Rat?+

Strong matches from rig and tone-complementarity evidence: Friedman Dirty Shirley, Peavey Invective 120, Synergy SL2 Module — Friedman Dirty Shirley leans this low gain tone toward high gain, which it doesn't make on its own.

How much does the ProCo Lil Rat cost?+

Around $88 (live listing price, updated Oct 24, 2026).

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