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Keeley 4-Knob Compressor Guitar Effects Pedal  

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Keeley's most popular pedal, the Keeley compressor has become an industry standard for stomp box compression. The sound will inspire, and your music will flow freely-just plug the compressor pedal in ... Click To Read More About This Product


Gear returned in mint condition. If you're looking for a virtually new instrument in possibly less-than-perfect packaging, this is a great value.
  • Includes 45-Day, No-Hassle Returns
  • Includes full manufacturer's warranty
Gear returned in great condition, with only minor signs of use, such as slight scuffs or pick marks. It looks and plays like new and may be considered an equivalent to display units found in retail stores.
  • Includes 45-Day, No-Hassle Returns
  • Includes full manufacturer's warranty
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Keeley's most popular pedal, the Keeley compressor has become an industry standard for stomp box compression. The sound will inspire, and your music will flow freely-just plug the compressor pedal in and let your head, heart, and fingers fly. The sound quality of the Keeley compressor is rarely heard in the stompbox arena and is only seen in very expensive rackmount or tube equipment.

It is a true audiophile and studio-grade compressor, with exotic rackmount-quality in a stomp box. The Keeley compressor pedal ships with the 9V DC jack at the top end of the guitar pedal and use the same type of power supply used by nearly all guitar effect manufacturers.

Internal Attack Control
The compressor pedal has an Internal Attack control, designed for bass players with high-output active pickups or active pedal boards with buffers.

Sensitivity Control
The Keeley compressor pedal also has an Input Sensitivity Control, meaning you can use this in your studio to run keyboards, drum machines, drum mics, even master recordings and other line-level uses. You'll raise your signal to a new level of sonic awesomeness.

True bypass switching circuit
True bypass means that when the effect is off your guitar tone will not be affected at all. The true bypass circuit makes sure you have absolutely no tone loss or signal reduction through the compressor pedal in the off/bypass mode.

Triple-pole double-throw switch
This switch makes sure you have absolutely no tone loss or signal reduction through the Keeley 4-knob compressor even in the off mode. Other compressors use a cheap switch and design that runs down your signal even when off or if the battery goes weak.

The Sustain Control
The 9 O'clock position should be barely noticeable. It will just take out really loud sudden peaks, this is great for protecting your speakers and the like. The 12 O'clock position provides the right presence for using the Keeley compressor pedal continuously while performing. The 3 O'clock position is great for solos. It really adds some cool effects to your playing dynamics. Only when really cranked do you get the pluck sound of your pick emphasized.

Tone-tested components
The Keeley compressor effect has nothing but tone-tested components and has true bypass switching. Effect switching incorporates a triple pole-double throw switch. You will have clean unaffected sound when in the bypass mode, with an LED for effect indication. Metal film resistors and capacitors ensure the cleanest compressor on the market. Hand matched transistors to less than 1% tolerance ensure you get a perfectly compressed signal, no chance for unwanted distortions. For those wanting a better tone than that of Trey Anastasio from Phish or David Gilmore of Pink Floyd or the Edge of U2 this is it.

Power supply
The DC jack is the standard type fitting just about every power supply out there. The Voodoo Labs Pedal Power, MXR DC Brick, Boss, Ibanez, etc. power supplies work perfectly with the compressor

Keeley's compressors are completely hand built and tested to ensure that there are no failures. The guitar pedal is "semi-abused" to make sure there is nothing but bliss when you install your new compressor. Since each compressor pedal is hand made there might be small differences as improvements are made. Every attempt is made to make sure your Keeley pedal looks perfect and sounds better than you imagined.

  • Internal attack control
  • Sensitivity control
  • Tone-tested components
  • True bypass switching circuit
  • Triple-pole double-throw switch
  • The sustain control

Pro Coverage gives you added warranty protection for your new gear. Stepping in where the manufacturer's "normal wear and tear" coverage ends, our Pro Coverage program offers you upgraded coverage if your product ever fails Read More.

Pro Coverage includes
  • Accidental damage protection (new gear only)
  • Expedited repair
  • Free shipping (for returns or repairs)
  • 100% coverage for commercial use
  • Extended return period
  • Extended price protection
  • No lemon guarantee
  • Free transfer of coverage to a new owner
  • Repair costs covered for up to three years from date of purchase
  • Repair authorization-toll-free by phone or via the web
  • Customer Reviews

Review Snapshot

by PowerReviews
Keeley4-Knob Compressor Guitar Effects Pedal

(based on 8 reviews)

Ratings Distribution

  • 5 Stars



  • 4 Stars



  • 3 Stars



  • 2 Stars



  • 1 Stars



Reviewed by 8 customers

Displaying reviews 1-8

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(13 of 13 customers found this review helpful)


Amazing Guitar Pedal

By Mark N.

from Lynchburg, Virginia

Comments about Keeley 4-Knob Compressor Guitar Effects Pedal:

A noiseless pedal that beats all other compressor pedals out. I was amazed at how the pedal wouldn't generate any noise unlike most other compressor pedals. Sound quality from the pedal is unbelievably great. The pedal is built like a tank so it's very durable. And on top of all of that, it is also very easy to use.

(12 of 13 customers found this review helpful)


Love this Pedal

By Jared

from Ashland City, TN

Comments about Keeley 4-Knob Compressor Guitar Effects Pedal:

This pedal is amazing. It has the best of vintage and modern qualities. It is the same as the 2 knob except the attack and clipping controls are given knobs, so you do not need to open up the case to adjust them. I went from using an MXR Dynacomp, which is an awesome pedal, but this pedal is by far a better product. There is no noise or volume loss when in use. It is easy to use and dial in tones. You can get a Santana-like sustain, James Gang rock sound, and tight country tones easily. I leave it on for about 75% of my showtime at gigs. If I could find one negative it is only this, the foot switch is very close to the knobs. Fortunately this has not been a problem in any of my performance situations. The pedal is built like a tank. Great American quality from an amazing American company. I have had to contact the Keeley company for other purchases and they are a great company to deal with they truly care for their customers and their tone. This pedal is a must have for any serious players. Your tone will improve by leaps and bounds. It works well with any type of guitar, even acoustic-electric. Buy this pedal!!

(9 of 10 customers found this review helpful)


Lots of Sustain!

By Billy

from Brooklyn, NY

Comments about Keeley 4-Knob Compressor Guitar Effects Pedal:

At first, I was choosing between the 2-knob and the 4-knob Keeley Compressor Pedal. I didn't think the extra 2 knobs would make that much of a difference until I raised the Attack time to the max, which gave me the punchiest strat tone. The sound coming out of this pedal is very transparent and doesn't make much noise compared to other compressor pedals until you max the sustain. It generally keeps most of the tone as you increase the sustain, much better than other compressors. My style is generally clean tone, strat through a compressor to a twin reverb and this is the perfect pedal for any clean player out there!

(8 of 14 customers found this review helpful)


This is the ultimate compressor pedal.

By Jacob Fusek

from Springfield, MO

Comments about Keeley 4-Knob Compressor Guitar Effects Pedal:

This pedal is truly amazing. It makes cleans sound very focused and clear, and will also add clarity to light overdrive. It has exceptional build quality, and the true-bypass switch is top quality.

(8 of 8 customers found this review helpful)


Best Stomp Box Compressor

By Mark

from Mesquite, Texas

Comments about Keeley 4-Knob Compressor Guitar Effects Pedal:

Over the years I have grown particularly picky and demanding regarding the musical equipment that I invest my hard-earned money in. My electric guitar rig is no exception. One of the most annoying aspects of an effect unit or stomp box is noise. I bought this Keeley 4 knob compressor for what it does not do and that is elevate the noise floor on my pedal board. I bought this unit to replace my modded Boss CS-3 Compressor/Sustainer which sounded great but was just too noisey to use in the studio. Robert Keeley is one of the best at his profession. His mods and products are alway above a certain standard for use by professional musicians. This compressor is a must have for any guitarist regardless of the musical genre played. This little unit gives an energized sparkle and boost to your amp channles both clean and over-driven. The sustain knob does a really nice job of creating those smooth and everlasting lead notes and all without a bunch of hiss. This thing is always in the active position on my floor rig and I could not not get "my sound" without it. The Attack and Clipping knobs do a wonderful job of smoothing and refining your playing technique. The bottom line is that this is the best stomp box compressor on the market. It has a small footprint, is built for heavy road use and is easy and intuitive to use. As long as I am alive and playing I will have this little gem on my rig.

(3 of 3 customers found this review helpful)


Great unit - Thanks Keeley!

By Lance Lyons

from Denver, Colorado

Comments about Keeley 4-Knob Compressor Guitar Effects Pedal:

I have this device and I use it throughout most of my live work. Its very clear, very musical and very easy to dial in. I have a GCP\GCX system and its earned its place as button 1 on the ground control. Do I recommend it - heck yes. Would I buy it again - of course.

(1 of 1 customers found this review helpful)



By zane Taylor

from Kirkland, WA

Comments about Keeley 4-Knob Compressor Guitar Effects Pedal:

This pedal is the miracle every guitarist needs. I call it my "always on" pedal, because I never have a reason to turn it off. If you're playing a gig and haven't sound checked, worry not, this pedal will provide a miraculous crystal clear tone, no matter what you're playing through. I have personally tested this pedal playing through various amps and guitars, and it never fails to create a clear sound many guitarists try to create. The only down side is when you turn it on it generates a pretty massive volume increase, which can be a good thing too I suppose, but is not ideal if you plan on turning it on and off during a song. I play primarily jazz ,blues, and funk, so this pedal is ideal for creating a usable clean sound, with enough high end and clipping to make fast, clean soloing a breeze. However when used in tandem with an overdrive pedal, this pedal can be a monster, creating distortion levels thought unreachable. So when using overdrive, I recommend proceeding with caution. But overall, buy this. Every guitar player would benefit greatly from it.


Keeley Dealy

By john raffaghello

from funky town

Comments about Keeley 4-Knob Compressor Guitar Effects Pedal:

Man this thing is expensive but it does sound good. You can use it as a boost, drive other pedals or smooth out your sound. I got a limited one that keeley signed which i thought was rad. I gave it 4 stars cause the price is a bit high.

Displaying reviews 1-8

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