Photo of JHS ProCo Rat "Rat Pack" Mod and more gear in a pedalboard and guitar

JHS ProCo Rat "Rat Pack" Mod

$170.00 Price Tier: Standard

4.5 (4)

1 Review

This product is Vintage or Discontinued

Newer option

JHS Packrat

$208.00 - $251.00

5.0 (2)

Find out who is using JHS ProCo Rat "Rat Pack" Mod

2 community setups

4 wishlisted

15 saved

Page last updated Jun 25, 2026

Pricing and availability

We compare 600+ stores and found this item at 1 store. Prices updated June 25, 2026.

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Price

5.0 (29)

$170.00 3 available Used

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Average Price: $170

Standard/Professional

$80

$181+

Price Tier

In the Distortion Effects Pedals category, JHS ProCo Rat "Rat Pack" Mod is priced in the upper end of the Standard/Professional range. This is quality gear at a fair price point, suitable for beginners, hobbyists, and pros alike.

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Standard

High-end

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Description

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Unleash the beast with the JHS ProCo Rat "Rat Pack" Mod, a beastly distortion pedal that redefines tone and character. Boasting a custom-made distortion chip, this pedal delivers a bold sonic impact with unparalleled clarity. The replaced capacitors ensure consistent performance, while the three clipping-stage switch offers versatile tonal adjustments. With an LED indicator for effortless operation, this distortion pedal is a true game-changer in the realm of guitar effects.

Key Features:

Custom-made distortion chip for bold sonic impact
Replaced capacitors for consistent performance
Three clipping-stage switch for versatile tonal adjustments
LED indicator for effortless operation

Product specs

Brand	JHS
Model	ProCo RAT 2 with "PackRat" Mod
Finish	Black
Year	2008 - 2018
Made In	United States
Categories	Distortion Pedals
Pedal Format	Standard

FAQs

What modifications does the JHS ProCo Rat "Rat Pack" Mod include?: The JHS "Rat Pack" Mod enhances the ProCo RAT 2 by offering a more versatile range of distortion tones, improved clarity, and a smoother gain structure, making it suitable for a variety of music genres.
How does the JHS "Rat Pack" Mod affect the original ProCo RAT 2 sound?: The mod retains the classic RAT distortion character while adding more tonal flexibility and reducing harshness, providing a more refined and dynamic response.
Is the JHS ProCo Rat "Rat Pack" Mod pedal suitable for live performances?: Yes, the JHS ProCo Rat "Rat Pack" Mod is designed to handle the rigors of live performance, offering reliable build quality and enhanced tonal options for stage use.
Can the JHS ProCo Rat "Rat Pack" Mod be used with both guitar and bass?: Yes, this modded pedal works well with both guitar and bass, delivering rich distortion tones that complement a variety of musical styles and instruments.
What type of power supply does the JHS ProCo Rat "Rat Pack" Mod require?: The JHS ProCo Rat "Rat Pack" Mod requires a standard 9V DC power supply, commonly used with most guitar pedals.

Videos

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Curtis Kent

JHS Pack Rat Mod vs ProCo Rat 2

Curtis Kent

JHS ProCo RAT2 Pack Rat

Mike Hermans

JHS ProCo RAT2 Rat Pack Mod demo with Les Paul & Princeton Reverb

gearmanndude

ProCo Rat - JHS Mod Review

Basement GAS

JHS Mod Rat - "Rat Pack" Demo

Tony Samperi

JHS Pedals Rat Pack Mod Demo

Beau Monde Guitars

RAT x RAT JHS

worshipguitarjapan

Reviews

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PROS

Keeps good definition during chords with higher gain
Boosting creates nice singing leads
Beefy build with aesthetically pleasing white knobs and green LED
Offers tone variation with a 3-way gain toggle
Virtually noiseless operation with a significant volume boost
Exceptional tone and low noise
Clean and sharp sound without creating mud
Strong tone shaping qualities with the filter
Works nicely in series with other pedals

CONS

Notes can be slightly muffled
Pedal is too tall, affecting pedalboard fit
Difficult to find a sweet spot when used alone
Distortion knob feels limited, with full distortion reached quickly
Can be over-compressed at full distortion setting
Considered situational, not ideal for all songs or settings

Owner Insights

We analyzed real musician discussions from forums and Reddit to find what players love, question, and tweak about JHS ProCo Rat "Rat Pack" Mod.

Mods and upgrades

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The "Pack Rat" mod includes a unique chip not used in other RAT modifications, improving noise levels and rounding the response.
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Features and functionality

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The mod offers three clipping gain options: vintage Si, open boost, and LED turbo RAT, accessible via a mini toggle switch.
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Replacing stock capacitors with metal film and tantalum caps enhances bass response and smooths high frequencies.
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The PackRat includes a mode for the Caroline Wave Cannon, which some users favor for its unique sound.
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The PackRat provides a unique opportunity for users to experiment with and compare nine distinct RAT variations, which can help identify personal preferences.
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Comparisons

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Compared to a clone with an LM308 chip, the modded pedal offers less grit but is preferred for its overall tonal quality.
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The Black Mass 1312 is highlighted as a cheaper alternative with top-mounted jacks and appealing artwork, compared to the PackRat.
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The Zander Circuitry Cranium offers multiple clipping options, including a notable MOSFET mode, and features a second footswitch for full gain control.
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The Black Mass 1312 is praised for its value and distinct approach, focusing on diode clipping, compared to the PackRat's comprehensive circuit changes.
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Use cases and applications

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Works well with a Walrus Voyager pedal in the signal chain, enhancing the sound profile.
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In studio settings, the PackRat is praised for its ability to quickly dial up overdrive, distortion, and fuzz tones from a single pedal.
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The PackRat is suggested for collectors or enthusiasts who appreciate exploring different RAT circuit variations rather than as an entry-level pedal.
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User experience

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The shroom toppers are generally liked but may occasionally not fit on certain switches.
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Many users report primarily using only a few modes despite the pedal's versatility, suggesting potential overkill for casual use.
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Value and pricing

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The PackRat's cost is justified by offering multiple RAT versions in one pedal, though similar tones might be achieved cheaper with individual pedals.
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It's anticipated that PackRat prices will decrease as more units enter the used market, potentially dropping to as low as $150.
Source

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4.5 out of 5

Based on 1 Review and 4 Ratings

5 star

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friendsoffriends

about 5 years ago

Great distortion but situational

The Rat is an amazing sounding distortion pedal that will send your guitar soaring. Its clean, sharp and specific without creating mud and unwanted warmth. And can work nicely in series with warmer harmonic distortion pedals.

The JHS mod helps with tempering volume and is a definite recommend if you're wanting a Rat. The filter is also very useful and has strong tone shaping qualities with a 'seesaw' like EQ.

The distortion knob however feels like it only has one setting. Once you go past 25% it seems to hit full distortion no matter how high or low you have the knob, and turning it up to full feels unnecessary and over-compressed. In saying that, I've had great success with it by drastically turning down the volume going into the Rat with EQ pedals (or any pedal with a volume knob) and the Rat turns into a really wonderful and concise saturator that feels fantastic in series with lighter overdrives and softer harmonic pedals like an EH Soul Food.

The Rat only gets used on one song in our live set, but without that track doesn't hit the same.

Overall a great pedal. But a situational one.