JHS MXR Dyna Comp Dyna Ross Mod

$110.00 Price Tier: Standard

4.5 (4)

This product is Vintage or Discontinued

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Page last updated Jun 08, 2026

Pricing and availability

We compare 600+ stores and found this item at 1 store. Prices updated June 8, 2026.

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Price

4.0 (6)

$110.00 2 available Used

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Average Price: $110

Standard/Professional

$50

$201+

Price Tier

In the Compressor Effects Pedals category, JHS MXR Dyna Comp Dyna Ross Mod is priced in 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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Embrace the essence of vintage compression with the JHS MXR Dyna Comp Dyna Ross Mod, a pedal designed to bring the iconic Ross Compressor's soulful squeeze into the modern era. Crafted for the discerning musician, this unit melds classic tonal qualities with contemporary reliability. Whether you're looking to smooth out your solos or add punch to your rhythm section, this pedal provides a dynamic range of compression that maintains the integrity of your original signal while imparting a lush, musical quality to your playing. With its straightforward interface, it invites players of all levels to fine-tune their sound, promising an intuitive experience without sacrificing depth or versatility. The Dyna Ross Mod upgrade takes this pedal from merely functional to phenomenally inspirational, ensuring it stands out in any pedalboard setup.

Key Features:

Modified compressor circuit that emulates the vintage Ross Compressor
Straightforward interface for easy operability
Maintains the integrity of the original signal
Provides a dynamic range of compression settings
Suitable for players of all levels

Product specs

Brand	JHS
Model	MXR Dyna Comp with "Dyna Ross" Mod
Finish	Red
Year	2012 - 2017
Made In	United States
Categories	Compressor Pedals
Pedal Format	Standard

FAQs

What is the JHS "Dyna Ross" Mod on the MXR Dyna Comp?: The JHS "Dyna Ross" Mod enhances the classic MXR Dyna Comp by providing a smoother compression with improved sustain and tonal clarity, making it ideal for both subtle and pronounced compression needs.
Is the JHS MXR Dyna Comp Dyna Ross Mod suitable for live performances?: Yes, the JHS MXR Dyna Comp Dyna Ross Mod is well-suited for live performances, offering reliable and consistent compression that helps maintain sound clarity and sustain on stage.
How does the JHS MXR Dyna Comp Dyna Ross Mod affect my guitar tone?: This pedal provides a warm, vintage-style compression that enhances sustain and evens out your guitar signal, resulting in a more polished and dynamic tone suitable for various music styles.
Can the JHS MXR Dyna Comp Dyna Ross Mod be used with a bass guitar?: While primarily designed for electric guitars, the JHS MXR Dyna Comp Dyna Ross Mod can also be used with bass guitars to achieve smooth, controlled compression and enhanced sustain.
What power supply does the JHS MXR Dyna Comp Dyna Ross Mod require?: The JHS MXR Dyna Comp Dyna Ross Mod requires a standard 9V DC power supply, commonly used for most guitar pedals.

Videos

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JHS Dyna Ross Mod vs MXR Dyna Comp

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PROS

Transparent sound enhances without altering tone
Offers a range of squish sounds, from subtle to pronounced
Excellent for beginners exploring compressor effects
Can significantly boost or cut output for versatile use

CONS

May arrive with technical issues (e.g., bypass problems, bad input jack)
Considered basic compared to more advanced models
Likely to be replaced as users upgrade their setup

Owner Insights

We analyzed real musician discussions from forums and Reddit to find what players love, question, and tweak about JHS MXR Dyna Comp Dyna Ross Mod.

Mods and upgrades

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Look for two resistors in series with a cap at the junction; they indicate a typical Ross mod inside the pedal.
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JHS Ross mod involves adding resistors and caps, which some owners feel isn't worth the high resale price.
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Analogman offers a Squeeze/Ross that is noted to be superior and more affordable than vintage Ross compressors.
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Value and pricing

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The JHS Ross modded Dyna Comp can be priced over $300, despite being a modification of an $80 pedal, raising questions about its value.
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New Ross pedals, priced around $190, are perceived as overpriced unless appealing to collectors or fans of specific artists like Trey Anastasio.
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User experience

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Owners express skepticism about the value of JHS mods when similar mods by other companies are available for less.
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The Ross distortion, similar to a "Marquis by Harmony," provides warm, creamy analog tones, leaning towards a borderline fuzz sound at max gain.
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Use cases and applications

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The Ross compressor is primarily valued for achieving a Phish-inspired tone, specifically appealing to fans wanting Trey Anastasio's sound.
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The Ross Compressor excels in funk and country for its squashed signal, enhancing higher and lower frequencies for a consistent sound.
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The sustain knob on the Ross Compressor controls the volume increase at the end of a note, enhancing tone rather than just compressing it.
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Besides funk and country, the Ross Compressor is versatile for genres from Zeppelin to Steely Dan, acting as a tone enhancer.
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Comparisons

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The difference between Ross and MXR Dyna Comp compressors is subtle, mostly noticeable to those specifically chasing the "Phish tone."
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Though similar in lineage, the Ross Compressor has a distinct attack time compared to the MXR Dyna Comp, setting it apart sonically.
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Features and functionality

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The Ross flanger with a hardwired AC cord is notable, and was famously used on the song "Barracuda."
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A trimpot inside the Ross Compressor allows adjustment of the attack intensity, offering flexibility not commonly found in similar models.
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The pedal can be used as a lead boost by setting the sustain low and level high, providing smoother legato and additional volume.
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