Pricing and availability

We compare 600+ stores and found this item at 5 stores. Prices updated .

Amazon
4.0 (10)
$249.00
Reverb
5.0 (4)
$235.25 New
$179.95 Used
Thomann
5.0 (13)
$270.00 $268.00 $2.00 · All time low
Gear4Music
£249.00

Average Price: $234

High-end/Boutique

$50

$201+

Price Tier

Budget

Standard

High-end

Price History

Based on price data from 2 merchants for "Diamond Comp/EQ". Prices shown reflect NEW condition. Tracking began Apr 3, 2026.

* Product prices and availability are updated by Equipboard every 24hrs and are subject to change. Equipboard may receive compensation for purchases made at participating retailers linked on this site. This compensation does not affect what products or prices are displayed, or the order of prices listed. For more information, please refer to our affiliate disclosure.

Description

Elevate your guitar tone with the Diamond COMP/EQ, a pedal that seamlessly blends classic compression with versatile EQ capabilities. This optical compressor maintains the signature charm of the Diamond circuit, offering both sharp, fast-response compression and softer, more transparent options with a simple flick of the attack switch. The integrated tilt EQ allows for intuitive tone sculpting, letting you shape your sound with ease, while the mid-range boost/cut control provides an additional layer of tonal versatility.

Crafted with precision, the Diamond COMP/EQ features custom spec'd, US-made opto-isolators for that silky smooth compression, and a Burr-Brown audio path for unparalleled sound fidelity. This pedal is designed for the discerning musician who demands high-quality sound without sacrificing pedalboard space. With its sleek, space-saving design and top-mounted jacks, it fits seamlessly into any setup. True to its roots, the Diamond COMP/EQ ensures a pristine signal path with relay-based true bypass switching.

Whether you're looking to add subtle warmth or a punchy presence to your sound, the Diamond COMP/EQ delivers with precision and style. Made in Canada, this pedal is a testament to quality craftsmanship and innovative engineering, perfect for modern guitarists seeking a reliable and versatile effects solution.

Key Features:

  • Optical compressor with tilt EQ
  • Classic Diamond circuit
  • Two attack settings: sharp and transparent compression
  • Mid-range boost/cut control of +/- 10 dB
  • Burr-Brown audio path
  • Relay-based true bypass
  • Top-mounted jacks
  • Made in Canada
  • Power supply via 9-18 V DC (not included)

Product specs

Available since May 2023
Effect Types Compressor

FAQs

What type of compression does the Diamond COMP/EQ pedal offer?

The Diamond COMP/EQ pedal provides optical compression, known for its smooth and natural response, making it ideal for both subtle dynamic control and more pronounced effects.

How does the EQ function work on the Diamond COMP/EQ pedal?

The EQ function on the Diamond COMP/EQ features a tilt EQ, allowing you to adjust the tonal balance by boosting highs and cutting lows or vice versa, offering versatile tone shaping.

Is the Diamond COMP/EQ pedal suitable for both electric and acoustic guitars?

Yes, the Diamond COMP/EQ pedal is designed to enhance the dynamics and tone of both electric and acoustic guitars, providing a versatile solution for various musical styles.

Does the Diamond COMP/EQ pedal require a specific power supply?

The Diamond COMP/EQ pedal operates on a standard 9V DC power supply, making it compatible with most pedalboard power solutions.

Can the Diamond COMP/EQ pedal be used in a bass guitar setup?

Yes, the Diamond COMP/EQ pedal can be effectively used with bass guitars, offering smooth compression and tonal shaping suitable for bass frequencies.

AndyDemos

AndyDemos

Diamond Pedals Are Back and Compact!

Video thumbnail for Diamond Pedals Are Back and Compact! by AndyDemos

Diamond Pedals Are Back and Compact!

AndyDemos

AndyDemos

Video thumbnail for Diamond Pedals Comp/EQ by Pedalboard of the Day

Diamond Pedals Comp/EQ

Pedalboard of the Day

Pedalboard of the Day

Video thumbnail for Diamond Pedals - This is How You Bring a Brand Back From the Dead! by The Pedal Zone

Diamond Pedals - This is How You Bring a Brand Back From the Dead!

The Pedal Zone

The Pedal Zone

Video thumbnail for Diamond Pedals Comp/EQ - Pedal Empire by Pedal Empire

Diamond Pedals Comp/EQ - Pedal Empire

Pedal Empire

Pedal Empire

Video thumbnail for Diamond IS BACK! Compressor & EQ by gearfever

Diamond IS BACK! Compressor & EQ

gearfever

gearfever

Reviews

PROS

  • Enhances tone subtly, making it 10-15% better

  • Features powerful Tilt EQ for brightness or darkness adjustments

  • Mid-boost around 800 Hz complements transparent drives well

  • Provides smooth, transparent compression

  • Versatile use across different music genres

  • Maintains harmonics and overtones even after fuzz effects

CONS

  • Not the best choice for pronounced compression in funk or country music

Owner Insights

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

User experience

  • Owners appreciate the Diamond Comp/EQ for its ability to "polish up" playing, especially beneficial for those new to using compressors.

    Source
  • Owners note running the pedal at 18V provides extra headroom beneficial for stronger signals like active pickups and boost pedals, enhancing the signal's clarity and presence.

    Source

Comparisons

  • Previous users of the older Diamond Comp Jr. model noted potential noise issues, highlighting advancements in the newer Comp/EQ version.

    Source
  • The Tilt EQ is a notable addition in the Diamond Comp/EQ, providing flexibility depending on the guitar being used, which was not available in the original model.

    Source

Use cases and applications

  • The Diamond Comp/EQ is favored in setups that place it post-delay for enhanced sound texture and clarity.

    Source
  • Positioning the Comp/EQ at 18V at the beginning of a signal chain helps avoid distortion with active pickups, offering a cleaner sound.

    Source

Features and functionality

  • The soft relay switch and separate mid control for EQ on the Diamond Comp/EQ offer enhanced user control over sound customization.

    Source
  • The adjustable attack feature allows users to switch between original and softer attack settings, catering to diverse playing styles and preferences.

    Source
  • The Comp/EQ can run at 9V or 18V, affecting headroom and dynamic range, with 18V offering tighter compression and transparency similar to older CP-1 and BCP-1 models.

    Source
  • The Comp/EQ supports experimentation with 12V or 15V input, allowing users to fine-tune headroom and compression characteristics.

    Source

Build quality

  • Users appreciate the robust construction of the new Comp/EQ, indicating improvements over previous models in terms of durability and design.

    Source

Other

  • The Comp/EQ uses a standard center-negative DC input, making it convenient for integration into modern pedalboards without special power adapters.

    Source
Add

5.0 out of 5

Based on 2 Reviews and 2 Ratings

5 star
4 star
3 star
2 star
1 star
M

Diamond Compressor Excellence

It’s a remarkably quiet compressor that can do its job without being recognized. It’s not a tone killer like every compressor that preceded it on my board.

tomisfer

Superb

This compressor is spectacular! I’m a big fan of optical compressors and this one is simply the best of them. The compression is smooth and pretty much transparent, and the EQ works beautifully. I can place it after germanium fuzz faces without losing the harmonics and overtones.

From Gear Setup

Artist usage

Add artist
See how Johnny Marr uses Diamond Comp/EQ

Johnny Marr

Singer, Guitarist

Modest Mouse

...
Verified via YouTube

In a YouTube video by TheGigRig, Dan Steinhardt is shown building a pedalboard for Johnny Marr, where the Diamond COMP/EQ pedal is clearly visible. This pedal is an updated version of the Diamond CPR1, which Marr has been known to use alongside his signature Fender Jaguar.

See how Ángel Parra uses Diamond Comp/EQ

Ángel Parra

Guitarist, Composer

Los Tres

...
Verified via Photo

Ángel Parra is confirmed to have used the Diamond COMP/EQ pedal during the recording of the new Los Tres album at Abbey Road Studios in July 2025. This is substantiated by a photograph of the pedalboard used in the studio.

See how Ally McErlaine uses Diamond Comp/EQ

Ally McErlaine

Guitarist

Texas

...
Verified via YouTube

In a YouTube video on Ally McErlaine's own channel titled "Ally McErlaine Pedal Combinations," the Diamond Comp/EQ pedal is both visible and mentioned in the description as part of the gear setup.

Genre Usage

Based on how artists on Equipboard use this gear, it is most commonly found in the following genres.

Used With

Based on how musicians on Equipboard use Diamond Comp/EQ, it is most commonly used with the following gear.

Community setups

Show yours
tomisfer

tomisfer

Gear IQ 812

zacsmith

zacsmith

Gear IQ 212

1 alternative for Diamond Comp/EQ, curated by the Equipboard community.

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