Diamond Guitar Pedals - CPR-1 Optical Compressor Pedal w/EQ (2025)

Departments > Guitars > > Guitar Effects > Effect Compression/Limiter > Diamond Guitar Pedals > CPR-1 Optical Compressor Pedal w/EQ

SKU: #220637|Model: #CPR1|Product Reviews7 ReviewsWrite a Review

Diamond Guitar Pedals - CPR-1 Optical Compressor Pedal w/EQ (3)

This product is no longer available.

Description

Reviews7

Performance Warranty

The Diamond Compressor is a dynamics and tone shaping tool for live and studio use, with low-noise, ultra-linear signal buffering, smooth opto-based compression, and a versatile 'tilt' EQ that musically shifts overall frequency balance. All in a user-friendly 3-control package - Comp, EQ and Volume.

Features
• Vactrol opto-isolator variable resistance path as used in high-end studio compressors for smooth attack and decay characteristics while preserving initial signal transients.
• Premium audio components, including 2% polypropylene capacitors, 1% metal film resistors and a pro audio grade opamp.
• Post-compressor 'tilt' EQ provides a very musical tailoring of frequency response • Seamlessly transition from a darker jazz voicing to a brighter jangle, with flat frequency response at the center detent position.
• Double filtering stage in side chain to eliminate low frequency modulation while preserving fast compression response.
• Dual AC capacitive coupling paths for improved transient response.
• Bi-colour LED provides visual indication of depth of compression.
• True bypass signal path.
• Battery or standard negative tip 9V DC adapter operation, can be powered from
9 to 24 V negative tip.

Q & A

There are currently no questions for this product.

Please Sign In or Register to ask a question

Reviews

132.145.215.147

Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/101.0.4951.54 Safari/537.36

Add Review

Very Good0 of 0 customers found this review helpful

Features

Quality

Value

Overall

Product Experience I own it

Closest Store Port Coquitlam, British Columbia

Best compressor I have purchased, works very good with other pedals, very little amp noise, made in Canada.

Posted by Vic on Jan 27, 2021

Was this review helpful? Vote helpfulVote not helpfulflag this review

Always on Awesomeness0 of 1 customers found this review helpful

Features

Quality

Value

Overall

Product Experience I own it

Closest Store Burlington, Ontario

Really love this pedal. I play Strats, Tele and. ED 330 with P90s and always have this pedal on. Main amp is a Supro Thunderbolt but goes well with my Blues Jr too. Cleans are better and my boats and drive pedals would great too! Can't say enough for the simplicity and sound. Try one!

Posted by Steve Smith on Jul 21, 2018

Was this review helpful? Vote helpfulVote not helpfulflag this review

Wow0 of 1 customers found this review helpful

Features

Quality

Value

Overall

Product Experience I own it

Closest Store Hamilton, Ontario

If I ever have to use only one pedal this is the one. I went from basement to stage with this pedal.I never thought in a million years that a compressor would ever be beneficial, was I wrong. Try this pedal and it will open doors and your mind to unlimited possibilities of wonderful sound you can achieve on any plane.

Posted by Big Johnny 5 on Apr 27, 2018

Was this review helpful? Vote helpfulVote not helpfulflag this review

Simply The Best2 of 2 customers found this review helpful

Features

Quality

Value

Overall

Product Experience I own it

Closest Store Summerside, Prince Edward Island

I was really blown away by this pedal! I had never gave much importance to using a compression pedal, just thought it wouldn't do much for me. Boy, was I wrong! My main amp is a Vox AC15c1 and the sound just seem to come alive and to my ears, removed some of the harsh sounds that I found annoying. The pedal is very well made, top quality and I would highly recommend it be on everybody's board!!

Posted by Carl on May 10, 2017

Was this review helpful? Vote helpfulVote not helpfulflag this review

Greater than the sum of it's parts.0 of 0 customers found this review helpful

Features

Quality

Value

Overall

Product Experience I own it

Closest Store Calgary Chinook, Alberta

I heard this for the first time and was completely shocked at what a little pedal with 3 knobs could do. I've tied it to my electric guitars and my acoustic and it sounds awesome.

Posted by anonymous on Jan 30, 2015

Was this review helpful? Vote helpfulVote not helpfulflag this review

Best compressor on the market, by far...0 of 0 customers found this review helpful

Features

Quality

Value

Overall

Product Experience I own it

Closest Store Sydney, Nova Scotia

Best compressor on the market, by far...

Posted by anonymous on Sep 30, 2014

Was this review helpful? Vote helpfulVote not helpfulflag this review

Great Compressor4 of 4 customers found this review helpful

Features

Quality

Value

Overall

Product Experience I own it

Closest Store Mississauga, Ontario

This isn't a compressor that squishes sound. If you play country or finger picking this compressor is probably not for you, but the sound of this pedal is amazing. Use it with a quality tube amp you are in tone heaven. It evens out the sound and makes it shimmer. For the price, I doubt you could find a better unit; hell, even the pricier compressors out there don't sound as good. Worth every penny.

Posted by anonymous on Aug 28, 2013

Was this review helpful? Vote helpfulVote not helpfulflag this review

Add Review

Diamond Guitar Pedals - CPR-1 Optical Compressor Pedal w/EQ (4)

Protect your investment with the Long & McQuade Performance Warranty

A warranty can be a very important factor when making a buying decision. Because repairs can be very expensive in terms of parts and labour costs, manufacturers usually only provide one year limited warranties that generally only cover items that malfunction due to a manufacturer’s defect. With an important purchase such as a musical
instrument or piece of studio gear, however, many people want to have the peace of mind in knowing that their investment will be protected should the product no longer be performing at 100%.

Because of this, Long & McQuade provides our customers with a FREE one-year Performance Warranty on most of our products. The Long & McQuade Performance Warranty supplements the manufacturer’s warranty to ensure that our customers receive complete “no hassle” warranty coverage within their first year.

How does the Long & McQuade Performance Warranty differ from most manufacturers' warranties?
  • Performance Guarantee: Normal wear and tear is covered, so your product will be performing as well as the day you purchased it for the entire duration of the coverage. Band and Orchestral Performance Warranty does not include replacing pads or cleaning for woodwind instruments, unless deemednecessary by our repair staff. Ultrasonic cleaning for brass instruments will be provided if deemed necessary by our repair staff, but is not routinely offered under the Performance Warranty.
  • Product Replacement: If your product cannot be fixed or costs too much to fix, we will replace it with the equivalent model for no additional charge. If this is not possible, a full refund will be provided.
  • No Lemon Policy: Your product will be replaced should the same problem occur multiple times.
  • Convenient: Easy drop off and pick up of the product at any Long & McQuade location.
  • Guitar Setup: Guitars purchased at Long & McQuade come with 1 free setup, to be redeemed within 1 year for new guitars and 90 days for used guitars.
  • Loaners Available: A loaner product may be given while the product is being repaired.
  • Power Surge Protection: Your product is covered even if damaged from a power surge.
  • Accessory Coverage: Any peripheral devices or accessories that come with your product (i.e. foot pedal, case) are also covered.
  • Commercial Use Coverage: Music and recording professionals who purchase gear for “heavy-use” commercial purposes will still be covered.

Long & McQuade reserves the right to restrict the purchase of additional years of Performance Warranty. Used products come with a 3-month Long & McQuade Performance Warranty. Some products (i.e. computers, software, cymbals and other items) are covered only by the manufacturer‘s warranty. Consumables (i.e. strings, reeds, drum sticks, batteries, tubes, cross faders) are excluded as they are designed to be replaced. Cosmetic Damage, Accidental Damage, or problems caused by Humidity or Temperature Issues are not covered. Speakers damaged by overpowering are generally not covered. Our coverage does not provide compensation for loss of use. As of June 2018 the Performance Warranty is no longer transferable.The warranty is only valid in Canada.

Purchasing additional years of coverage

Some manufacturers provide warranties for longer than 1 year; however, these are usually limited warranties that do not provide the same coverage as the Long & McQuade Performance Warranty. Customers interested in more complete and convenient (but not necessarily longer) coverage are still able to purchase additional years of the Performance Warranty.

If you are interested in receiving this coverage for longer than one year, you have the option of purchasing additional years of the Performance Warranty. The pricing is as follows:

  • NEW products: 4% of the current new selling price to double the warranty from 1 year to 2 years. 4% for each additional year.
  • USED products: 4% of the current new selling price to increase the warranty from 3 months to 1 year. 4% for each additional year.
  • GUITARS: 4% of the current new selling price to double the warranty from 1 year to 2 years. 4% for each additional year. $45 maximum. An additional free setup is not included with additional purchased years of Performance Warranty.
  • BAND and ORCHESTRAL instruments: 4% of the current new selling price to double the warranty from 1 year to 2 years. 4% for each additional year.

Great Additions

We are not able to get online delivery information from our supplier.
When ordered you will be contacted with an expected delivery date.

Rate this Product

Add a reply

Flag this review

What is the Long & McQuade Advantage?

Long & McQuade is a family-owned Canadian business that has been servicing the Canadian music industry for over 60 years. Our experienced team of experts offers the highest level of before- and after-sale service. Our policies and services are designed to provide you with the ideal shopping experience.


  • Over 100 locations across Canada
  • Buy online, pickup or ship from stores
  • In-store, phone or online chat support on all purchases
  • Satisfaction guarantee
  • Lowest price guarantee
  • 30-day price protection
  • Hassle-free return policy
  • Free shipping over $99
  • Largest inventory of musical instruments in Canada
  • Over 125 repair technicians across Canada to meet your service needs

Reserve in Store

Product SKU Qty
CPR-1 Optical Compressor Pedal w/EQ 220637

Reserve

Extend your Performance Warranty

$10.76 CDN

1 Year 2 Years 3 Years

Performance Guarantee - normal wear and tear is covered, so your product will be performing as well as the day you purchased it for the entire duration of the coverage. 100% Parts and Labour Coverage.

Product Replacement - if your product cannot be fixed or costs too much to fix, we will replace it with the equivalent model for no additional charge. If this is not possible, a full refund will be provided.

No Lemon Policy - your product will be replaced should the same problem occur multiple times.

Convenient - easy drop off and pick up of the product at any Long & McQuade location.

Guitar Setup - Guitars purchased at Long & McQuade come with 1 free setup, to be redeemed within 1 year for new guitars and 90 days for used guitars.

Loaners Available - a loaner product may be given while the product is being repaired.

Power Surge Protection - your product is covered even if damaged from a power surge.

Accessory Coverage - any peripheral devices or accessories that come with your product (i.e. foot pedal, case) are also covered.

Commercial Use Coverage - music and recording professionals who purchase gear for “heavy-use” commercial purposes will still be covered.

Yes, Extend Performance Warranty

No, Thank You

");}$('.product-header .alert').append("

" + ntfMsg + "

");$([document.documentElement, document.body]).animate({scrollTop: $(".product-header .alert").offset().top}, 500);}});})});$(window).on("load", function() {var elements = $(".single-answer-text");for (i = 0; i < elements.length; i++) {var answer = $(elements[i]).html();$(elements[i]).html(answer.replace(/((http:|https:)[^\s]+[\w])/g, '$1'));}Common.appendCss("https://cdn.jsdelivr.net/npm/@fancyapps/ui@5.0/dist/fancybox/fancybox.css");//Zoom function on product imageif (window.innerWidth >= 992) {//$('.zoomImg').css({'width' : $('#product-image').width(), 'margin-left' : '200px', 'background-color' : 'white'});$('#product-image-lg').zoom({magnify: 2});}const fancybox = Fancybox.getInstance();if (window.innerWidth >= 992) {Fancybox.bind('[data-fancybox]', {// Your custom optionscontentClick: "false",backdropClick: "false",Toolbar: {display: {right: ["close"],},},on: {reveal: (fancybox, slide) => {const node = document.querySelector('.fancybox__content');const clone = node.cloneNode(true);const parentNode = node.parentNode;parentNode.innerHTML = '';parentNode.append(clone);if (slide.el.classList.contains('has-image')) {$('.fancybox__slide').addClass('cursor-zoom-in');$('.fancybox__slide').append('

Click image to toggle zoom

');$('.zInfo').animate({opacity: 1}, 1500, function() {$('.zInfo').animate({opacity: 0}, 1500);});$('.fancybox__slide').zoom({'magnify': 1.6,'on': 'click'});} else if (slide.el.classList.contains('has-youtube')) {$('.fancybox__slide').removeClass('cursor-zoom-in');$('.fancybox__iframe').attr("allow", "fullscreen");$('.fancybox__slide').removeClass('cursor-zoom-out');if ($('.zInfo').length) {$('.zInfo').remove();}}},close: (fancybox) => {if ($('.zoomImg').length) {$('.fancybox__content').empty();}},},}); //end fancybox desktop} else {Fancybox.bind('[data-fancybox]', {Toolbar: {display: {right: ["zoomIn", "zoomOut", "thumbs", "close"],},},});}if ($('#product-image').attr('src') == 'https://cdn.long-mcquade.com/images/noimage.jpg' || $('#product-image').attr('src') == 'https://cdn.long-mcquade.com/images/print-noimage-md.png') {$('#product-image-lg').removeAttr('data-fancybox');}$('#yt-desc-btn').on('click', function() {$('#yt-desc').css('max-height', '100%');$('#yt-desc-btn').hide();});});var lang_your_price = 'Your Price';var lang_sale_price = 'Sale Price';var lang_original_price = 'Original Price';

Your Store: Toronto (Bloor St.)

925 Bloor Street W
Toronto (Bloor St.), Ontario, M6H 1L5
Phone: (416) 588-7886
Fax: (416) 532-9708
Email: info@long-mcquade.com
View Store Details

Meet our Staff

Store Hours

Monday: 10:00am - 6:00pm
Tuesday: 10:00am - 6:00pm
Wednesday: 10:00am - 6:00pm
Thursday: 10:00am - 8:00pm
Friday: 10:00am - 8:00pm
Saturday: 10:00am - 6:00pm
Sunday: 12:00pm - 5:00pm

Pickering (Web Sales)

Pickering (Web Sales), Ontario,
Phone: 1-855-588-6519
French Phone: 1-855-472-0335
Email: websales@long-mcquade.com
View Store Details

Meet our Staff

Store Hours

Sunday 9:00am - 9:00pm (EST)
Monday: 8:00am – 10:00pm(EST)
Tuesday: 8:00am – 10:00pm(EST)
Wednesday: 8:00am – 10:00pm(EST)
Thursday: 8:00am – 10:00pm(EST)
Friday: 8:00am – 10:00pm(EST)
Saturday: 8:00am - 8:00pm(EST)

All Times are Eastern Daylight Time

View all locations

Sign In

If you don't have an account

Register Account Today

Don't miss out on these great benefits

Fast & convenient checkout

Your information is saved and ready to be used again

Easily track orders

Find out where your purchase is and when it may arrive

Quickly view order history

Your order history is always just a click away

Security & Privacy

Every transaction on Long-McQuade.com is secure. Any personal information you give us will be handled according to our Privacy Policy.

Recover Password

Sign In With Facebook

Diamond Guitar Pedals - CPR-1 Optical Compressor Pedal w/EQ (5)

Diamond Guitar Pedals - CPR-1 Optical Compressor Pedal w/EQ (6)

Diamond Guitar Pedals - CPR-1 Optical Compressor Pedal w/EQ (7)

Support Music Therapy at Children's Hospitals

Donate to support your closest participating children's hospital or organization.
A full list of beneficiaries can be found Opens News pagehere.

Amount

Make Donation

Not Today

Diamond Guitar Pedals - CPR-1 Optical Compressor Pedal w/EQ (2025)
Top Articles
Latest Posts
Recommended Articles
Article information

Author: Velia Krajcik

Last Updated:

Views: 6170

Rating: 4.3 / 5 (54 voted)

Reviews: 93% of readers found this page helpful

Author information

Name: Velia Krajcik

Birthday: 1996-07-27

Address: 520 Balistreri Mount, South Armand, OR 60528

Phone: +466880739437

Job: Future Retail Associate

Hobby: Polo, Scouting, Worldbuilding, Cosplaying, Photography, Rowing, Nordic skating

Introduction: My name is Velia Krajcik, I am a handsome, clean, lucky, gleaming, magnificent, proud, glorious person who loves writing and wants to share my knowledge and understanding with you.