Diamond Comp Jr

^# 34

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$206.62 Price Tier: High-end

4.5 (6)

2 Reviews

This product is Vintage or Discontinued

Find out who is using Diamond Comp Jr

1 community setup

3 wishlisted

15 saved

Page last updated Jun 06, 2026

Pricing and availability

We compare 600+ stores and found this item at 1 store. Prices updated June 6, 2026.

Store

Reviews

Price

5.0 (46)

$206.62 3 available Used

View Deal

Average Price: $207

High-end/Boutique

$50

$201+

Price Tier

In the Compressor Effects Pedals category, Diamond Comp Jr 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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The Diamond Comp Jr pedal is your ticket to studio-grade compression, packed into a portable guitar pedal enclosure. This optical compressor lends a powerful command over your musical dynamics and tone, empowering you with enhanced sustain and smooth attack. It boasts premium components that tactfully craft a sound nothing short of stunning. With its single dial post-compressor EQ, you can effortlessly swing between dark, mellow tones to a melodious jangle. This pedal is not just a tool, but a companion in your musical journey, helping you bring your creative vision to life.

Key Features:

Optical compressor for powerful control over dynamics and tone
Enhanced sustain and smooth attack for a rich sound experience
Premium components ensuring top-notch sound quality
Single dial post-compressor EQ for easy tonal adjustments
Ability to swing from dark, mellow tones to a highly musical jangle

Product specs

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

FAQs

What is the power requirement for the Diamond Comp Jr pedal?: The Diamond Comp Jr can be powered by a standard 9V negative tip DC power adapter or battery, but for maximum headroom and tone, using an 18V power supply is recommended.
Is the Diamond Comp Jr compressor pedal true bypass?: Yes, the Diamond Comp Jr features a true bypass signal path, ensuring your original signal remains unaffected when the pedal is not engaged.
How does the Diamond Comp Jr affect my guitar tone?: The Diamond Comp Jr offers smooth compression that enhances sustain and clarity, making it suitable for a wide range of musical styles while preserving the natural dynamics of your playing.
Can the Diamond Comp Jr be used with a bass guitar?: While primarily designed for electric guitars, the Diamond Comp Jr can also be used with bass guitars to achieve a balanced and clear tone.
What are the main features of the Diamond Comp Jr compressor pedal?: The Diamond Comp Jr features optical compression, true bypass, and a compact design, providing high-quality sound and ease of use for both live performances and studio recordings.

Videos

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Brett Wondrak

Diamond Comp Jr vs Keeley Compressor Plus

Brett Wondrak

Diamond Comp Jr. Compressor

Regent Sounds

Diamond Compressor Jr. vs Diamond Compressor CPR1 Demo

Trevor Dick

Maybach Stradovari Masterbuilt by Nick Page + Diamond Comp Jr.

Maybach Guitars Official

Red eye D.I + Holy Grail + JHS Boss EQ Modi + Diamond comp jr + Xotic RC Booster & Super Clean

WM SOUND Guitars 원미사운드

Reviews

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PROS

Enhances tone without squashing signal
Adds sustain and a nice edge to the tone
Simple to use with only three knobs
Effective for both electric and acoustic leveling
Compact size saves pedalboard real estate
Adds grit and boost to clean sounds
Minimal noise production

CONS

Pops loudly when switching on/off without a pedal switcher
EQ settings can be problematic, causing spiky highs or muffled lows

Owner Insights

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

Features and functionality

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The Diamond Comp/EQ includes a separate mid control and Tilt EQ, offering flexible tonal adjustments depending on the guitar used.
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The newer model allows adjustment of the attack setting, with options for the original attack and a softer position preferred by some users.
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Build quality

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The soft relay switch on the Diamond Comp/EQ is praised for its smooth operation, enhancing the pedal's overall usability.
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The miniaturized design of the Diamond Comp Jr is praised for maintaining the sonic quality of the full-sized version.
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User experience

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Owners appreciate the Diamond Comp Jr's compact size and top-mounted jacks, making it ideal for pedalboards with limited space.
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The pedal is noted for being quiet, with minimal hiss even when the EQ is adjusted.
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Comparisons

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Users transitioning from the Philosopher’s Tone micro note the Diamond Comp Jr provides a warmer, smoother tone.
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The Diamond Bass Comp's ability to warm up bass tones influenced some users to choose the Diamond Comp Jr for guitar.
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The Diamond Comp Jr is noted for its clean, jangly sound that avoids squashiness unless compression is maxed, unlike the Pulp n Peel, which is inherently more squashy with built-in distortion.
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Use cases and applications

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The Diamond Comp Jr enhances tone on a Mexican Strat, particularly beneficial for single coil pickups prone to noise.
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The Pulp n Peel is described as suitable for achieving a Nile Rogers-style, Chic-inspired tone, particularly effective in a clean setting.
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The Pulp n Peel's built-in distortion is often bypassed in favor of dedicated drive pedals for better quality, but its dynamic control is appreciated on acoustic guitars.
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4.5 out of 5

Based on 2 Reviews and 6 Ratings

5 star

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1 star

whereismyyymind

986

over 4 years ago

Good compressor, questionable EQ

While I really liked the compression for it's somewhat airy tone enhancement I disliked the EQ as it either gets spiky in the highs or muffled in the lows, at least with my setup. In the end I just left it at 12 o'clock.

Roles:

Guitarist Music Producer

Genres:

Rock Pop Alternative rock

charles_rhine

112

about 6 years ago

Cleans and Shines

This pedal makes most things sound better. It cleans up your sound and boosts it too. That boost an add grit to intentionally clean sounds; otherwise, I always have this pedal at just past noon.