Keeley 4 Knob Compressor for Vintage Guitar Compression



Award winning standard for stomp box compression.


SKU: K4Comp Categories: ,

Product Description

Keeley 4 Knob Compressor – Vintage Guitar Compression

All of our 44,000+ of our Keeley 4 Knob Compressors have been built in the USA.  It’s been at home on stages, the studio, churches, as well as bars and bedrooms!  The Keeley Compressor was given the Editor’s Pick Award from Guitar Player’s Magazine and recently awarded Reader’s Choice for Stomp Box Compression.

From my original website in 2001… “It is a true audiophile and studio grade compressor with an exotic rack mount quality in a stomp box form. The sound will inspire your creativity.

The Keeley 4 Knob Compressor has nothing but tone tested components and true bypass switching and the effect switching incorporates a triple pole-double throw switch! The user will marvel at the clean unaffected sound when in the bypass mode and the compressor has an LED for effect indication.

The sound quality of the Keeley 4 Knob Compressor is unheard of in the stomp-box arena and is only seen in the high-end, very expensive rack-mount or tube equipment.”

Standard 9V DC battery and AC adapter connection. Low Current Draw – 5mA.

Keeley 4 Knob Compressor – Voted 2004 Guitar Player Magazine’s Editor’s Pick Award.

Keeley’s most popular pedal, the Keeley 4 Knob 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.

The Keeley 4 Knob Compressor is a true audiophile and studio-grade compressor, with exotic rack mount-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.

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.

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.

Clipping 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. 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.

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

The Keeley 4 Knob Compressor is built in the USA and each unit is tested to ensure that there are no failures.  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.

Best Effects Review

Gabriel Tanaka’s review of the Keeley 4 Knob Compressor

All Keeley pedals include a one year parts and labor warranty!

For all repairs you must complete the Repair Ticket Form below before you return a pedal for repair. We only repair pedals that have been made or modded by us, or pedals that are going to receive our mod while they are getting repaired.

There may be repair fees for pedals that will be receiving mods or pedals that have malfunctioned from user error like plugging in wrong power supply, running over it with a truck, etc… Thank you for your cooperation!

Go to our Warranty Page to fill out a Repair Ticket Form.

Product Manuals


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Artists Loving This Pedal

Adrian Belew
Brent Mason
Brent Rowan
Buddy Miller
Billy Dawson
Chalie Hunter
Coy Boles
Dan Huff
Dave Weiner
Dweezil Zappa
G Lynch
Gary Morse
Greg Lockhart
Jerry McPherson
John Mayer
Pearl Jam
Pete Anderson
Peter Stroud
Sonny Landreth
Steve Kimock
Steely Dan – Walter Becker
Zac Brown


Width (Not Counting Jacks) – 2.35″
Height (Not Counting Jacks) – 4.41″

Input / Output Jack Location – Side
DC Jack Location – Top

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Keeley Compressor Instructions Manual Card

Keeley Compressor Instructions Manual Card

Keeley Compressor Instructions Manual Card

Keeley Compressor Instructions Manual Card

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