Diamond Comp Jr. (Black)

$205.80 Price Tier: High-end

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Page last updated Jun 09, 2026

Pricing and availability

We compare 600+ stores and found this item at 1 store. Prices updated June 9, 2026.

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Price

5.0 (46)

$205.80 3 available Used

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Average Price: $206

High-end/Boutique

$50

$201+

Price Tier

In the Compressor Effects Pedals category, Diamond Comp Jr. (Black) is priced in the High-end/Boutique range. This premium gear is built to very high standards and offers premium features.

Budget

Standard

High-end

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Description

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For guitarists who crave the perfect blend of precision and simplicity, the Diamond Comp Jr. offers studio-quality compression in a pedalboard-friendly package. This optical compressor delivers exceptional dynamic control, allowing you to enhance your sustain and smooth out your attack with minimal fuss. Whether you're aiming for lush, sustained notes or crisp, articulate picking, the Diamond Comp Jr. ensures your sound remains clear and vibrant.

The pedal's intuitive controls make it easy to dial in your desired tone. A single post-compression EQ dial lets you effortlessly shift from rich, warm tones to a bright, chime-like jangle, making it versatile enough for any musical style. Crafted with high-quality components, this pedal guarantees a pristine sound that will elevate your performance on stage or in the studio. The compact design ensures it fits seamlessly into your setup, without compromising on the quality that Diamond pedals are known for.

Key Features:

Optical compression for smooth, natural dynamics
Compact design for easy pedalboard integration
Post-compression EQ for versatile tone shaping
High-quality components for pristine sound quality
Simple, user-friendly controls for quick adjustments

Product specs

Brand	Diamond
Model	Comp Jr.
Finish	Black, Yellow
Year	2010s
Made In	Canada
Categories	Compressor Pedals
Pedal Format	Standard

FAQs

What type of compression does the Diamond Comp Jr. provide?: The Diamond Comp Jr. offers smooth, transparent optical compression, ideal for enhancing sustain and evening out dynamics without coloring your tone excessively.
Is the Diamond Comp Jr. suitable for both electric and acoustic guitars?: Yes, the Diamond Comp Jr. is versatile and works well with both electric and acoustic guitars, providing clear and consistent compression across different instrument types.
Does the Diamond Comp Jr. require a specific power supply?: The Diamond Comp Jr. requires a standard 9V DC power supply, center-negative, which is common for most pedalboards.
How does the Diamond Comp Jr. differ from other compressor pedals?: The Diamond Comp Jr. is known for its musical, transparent compression and simple controls, making it easy to dial in the perfect sound without complicated settings.
Can the Diamond Comp Jr. be used in a live performance setting?: Absolutely, the Diamond Comp Jr. is designed for both studio and live performance use, providing reliable compression to enhance your guitar's tone on stage.

Reviews

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PROS

Super musical with a smooth, non-squashing compression
Adds a subtle yet distinct Diamond tone to your sound
Acts as another gain stage, enhancing tone edge
Minimal noise with a brilliant EQ for easy leveling
Easy to use with only three knobs for intuitive adjustments
Transparent and versatile, suitable for various music genres
Compact size fits easily on pedalboards
Highly regarded by musicians like Johnny Marr

CONS

Loud switch pop when turning on/off

Owner Insights

We analyzed real musician discussions from forums and Reddit to find what players love, question, and tweak about Diamond Comp Jr. (Black).

Comparisons

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The Diamond Comp Jr. is noted for its smooth, warm tone, contrasting with the sterile sound of the Philosopher’s Tone Micro.
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The full-sized Diamond Comp is considered similar in tone to the Jr. but takes up more pedalboard space, prompting some to prefer the smaller model.
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The pedal struggles with the EHX Pitchfork, especially when using octave down due to the EQ tilt setting reducing bass.
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The Diamond Comp Jr. is preferred by those who want to avoid the squashed sound typical of other compressors, unlike the Keeley Compressor Pro which is known for its IC compression style.
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Features and functionality

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Owners appreciate the top-mounted jacks on the Diamond Comp Jr. for better pedalboard space management.
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The EQ tilt feature adds character and offers versatile options with other pedals, enhancing both clean and dirty tones.
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User experience

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Reports indicate that the Diamond Comp Jr. adds minimal noise, attributed more to single-coil pickups than the pedal itself.
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Some owners find the difference subtle when on, but noticeable when turned off, leading them to keep it always engaged.
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Owners describe the Diamond Comp Jr. as capable of smoothing out distortion tones, ensuring notes remain clear and level, especially with P90 pickups in humbucker configurations.
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Use cases and applications

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Users find the Diamond Comp Jr. enhances warmth in tone, particularly noticeable when used with a Stratocaster guitar.
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Works well with Dimarzio 36th Anniversary PAF pickups, even with natural compression from a Vox AC10 amp.
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Enhances ambient and wet tones, especially when used first in the pedal chain.
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The Diamond Comp Jr. is recommended for players seeking to balance and sweeten tone without heavy compression, making it suitable for rhythm guitar with big overdriven chords.
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