Pricing and availability

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Average Price: $94

Standard/Professional

$50

$176+

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Description

Dive into the sonic exploration with the Electro-Harmonix XO Knockout Attack Equalizer, a pedal that's as versatile as it is dynamic. Its dual filter foundation breathes new life into your guitar's tone, allowing you to sculpt your sound from the ground up. Whether you're aiming to enhance your instrument's natural character or venture into completely new tonal territories, this equalizer's seamless control and seven-pole filter design offer unmatched precision. Perfect for the experimental guitarist, this pedal is a true game-changer in achieving your unique sound.

Key Features:

  • Dual filter foundation for versatile tone shaping
  • Seven-pole filter design for precise control over your sound
  • Controls for low, dry, and high adjustments
  • Capable of transforming low-end sustain into high-treble soar
  • Ideal for creating distinct guitar voicings

Product specs

Brand Electro-Harmonix
Model Knockout Attack EQualizer
Finish Black / Yellow / Red
Year 2008 - 2021
Categories EQ Pedals, Filter and Wah Pedals

FAQs

What is the primary function of the Electro-Harmonix XO Knockout Attack Equalizer?

The Electro-Harmonix XO Knockout Attack Equalizer is designed to shape your guitar's tone by emphasizing specific frequencies, allowing for a wide range of tonal adjustments from subtle enhancements to dramatic shifts.

Does the Electro-Harmonix XO Knockout work well with bass guitars?

Yes, the Electro-Harmonix XO Knockout is suitable for both electric and bass guitars, providing the ability to sculpt low-end frequencies effectively for bass players seeking more punch or clarity.

What are the standout features of the Electro-Harmonix XO Knockout Attack Equalizer?

The standout features include its ability to produce a wide range of EQ effects, from mimicking single-coil to humbucker tones, and its compact design, making it a versatile addition to any pedalboard.

How does the Electro-Harmonix XO Knockout differ from a traditional EQ pedal?

Unlike traditional EQ pedals that offer basic frequency adjustments, the XO Knockout provides specific controls for low, dry, and high frequencies, allowing for more precise and creative tone shaping.

What kind of power supply does the Electro-Harmonix XO Knockout require?

The Electro-Harmonix XO Knockout requires a standard 9V power supply, which is common for most pedalboards, ensuring easy integration into existing setups.

EHX

EHX

Electro-Harmonix Knockout Attack Equalizer Reissue (Demo by Dan Miller)

Video thumbnail for Electro-Harmonix Knockout Attack Equalizer Reissue (Demo by Dan Miller) by EHX

Electro-Harmonix Knockout Attack Equalizer Reissue (Demo by Dan Miller)

EHX

EHX

Video thumbnail for Electro-Harmonix Knockout Attack Equalizer Reissue (Film by Michael Leonhart) by EHX

Electro-Harmonix Knockout Attack Equalizer Reissue (Film by Michael Leonhart)

EHX

EHX

Video thumbnail for Electro Harmonix Knockout Attack Equalizer EQ Pedal Demo by Isurus

Electro Harmonix Knockout Attack Equalizer EQ Pedal Demo

Isurus

Isurus

Video thumbnail for Electro-Harmonix - Knockout - Film by Michael Leonhart - Attack Equalizer Reissue by JRR Shop

Electro-Harmonix - Knockout - Film by Michael Leonhart - Attack Equalizer Reissue

JRR Shop

JRR Shop

Video thumbnail for EHX Knockout Attack Pedal Review - Is It A Secret Weapon? by Brooksy's Bass Corner

EHX Knockout Attack Pedal Review - Is It A Secret Weapon?

Brooksy's Bass Corner

Brooksy's Bass Corner

Video thumbnail for Electro Harmonix KNOCKOUT attack equalizer - Bass Demo by GUITAR GEAR - Strumenti Musicali Dalmine BG

Electro Harmonix KNOCKOUT attack equalizer - Bass Demo

GUITAR GEAR - Strumenti Musicali Dalmine BG

GUITAR GEAR - Strumenti Musicali Dalmine BG

Reviews

PROS

  • Unique compressed sound ideal for old school blues

  • Enhances tone subtly, akin to a Sonic Maximizer

  • Perfectly voiced 3-band EQ creates versatile tones

  • Can significantly alter guitar tone for varied music styles

  • Tightens up low end for clearer note definition

  • Works well with both guitar and bass

  • Useful "Dry" knob for balancing natural guitar tone

  • Affordable option for quality sound shaping

CONS

  • Bass control can introduce unwanted, booming bass if not carefully adjusted

  • Volume drop requires additional booster pedal for compensation

  • Overuse can potentially damage speakers

Owner Insights

We analyzed real musician discussions from forums and Reddit to find what players love, question, and tweak about Electro-Harmonix XO Knockout Attack Equalizer.

Use cases and applications

  • The Knockout Equalizer can sometimes make a humbucker sound more like a single-coil, reportedly doing a better job than splitting coils.

    Source

Features and functionality

  • Users have found the Knockout's ability to enhance single-coil tones from humbuckers to be surprisingly effective, expanding its utility for varied guitar setups.

    Source

Critic Reviews

Electro-Harmonix Knockout - Effects - Harmony Central

harmonycentral.com

The Electro-Harmonix Knockout Attack Equalizer impresses with its ability to drastically alter the tonal character of both guitars and basses. While it might not transform a Strat into a Les Paul entirely, it offers a unique tonal shaping experience that other EQ pedals can't match. The reissue enhances the original with a robust build, true bypass, and an LED indicator, making it an improved version of its vintage counterpart. Though it's not ideal for corrective EQ tasks, its strength lies in creative tonal manipulation, especially for bass. At an affordable price point, it’s a worthwhile addition to any musician's pedalboard.

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4.0 out of 5

Based on 4 Reviews and 12 Ratings

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E

love it on bass

ive been using it as a booster pedal on bass, keeping the low and high knobs both at noon and the dry knob a little before. it makes a very significant change and just makes it sound way warmer. more control over the mids would be appreciated but given that i only paid around $50 i cant complain. im currently using it with my sansamp and im satisfied with how they compliment each other. it was the first pedal i bought specifically for bass and gave me an idea of what i wanted out of my bass tone. if you can get it for around the same price as i did, then i definitely do recommend it especially for beginners such as myself. its the foundation of my bass tone

nicjimba55

BAAAASSSSS

I use this to fatten up my tone, which is does, very nicely. Don't go overboard, or you may kill some speakers!

raymond_cracchiolo

must have for djent

really tightens up low end. makes each note come out clear

Z

Pretty good at tightening up your sound, especially on bass

Artist usage

Add artist
See how Dominic Aitchison uses Electro-Harmonix XO Knockout Attack Equalizer

Dominic Aitchison

Bassist

Mogwai

...
Verified via YouTube

To the right of the Bass Driver is an EHX Knockout, not to be confused with a Big Muff Pi. The design shows a glove, which is just visible below the tape.

See how Roberto Burgos uses Electro-Harmonix XO Knockout Attack Equalizer

Roberto Burgos

Singer, Guitarist

Sweet Trip

...
Verified via Twitter

"Planning the pedal board with poster paper"

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 Electro-Harmonix XO Knockout Attack Equalizer, it is most commonly used with the following gear.

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