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Average Price: $170

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$60

$151+

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High-end

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Description

Step back into the glory days of rock with the Keeley Java Boost, a treble booster that channels the classic tones of the '60s and '70s. This pedal pays homage to legendary circuits like the Dallas Rangemaster, making it the perfect companion for guitarists looking to push their tube amps into pure, harmonic bliss. Unlike typical overdrive pedals, the Java Boost is crafted to enhance your amp's natural breakup, amplifying your sound without overshadowing it.

The OC44 Germanium transistor is at the heart of this pedal, delivering that coveted vintage tone with rich, dynamic responsiveness. Designed specifically for use in front of amps teetering on the edge of distortion, the Java Boost adds sparkle and definition, breathing new life into your sound. Whether you're chasing that iconic British crunch or just want to cut through the mix with clarity, this pedal is your ticket to tonal nirvana.

With its simple yet effective control layout, the Java Boost allows you to effortlessly dial in the perfect amount of boost and treble, ensuring that your signature sound stands out in any setting. It's not just a pedal; it's a journey back to the golden age of rock and roll.

Key Features:

  • Treble booster inspired by the iconic Dallas Rangemaster
  • OC44 Germanium transistor for authentic vintage tone
  • Designed for use with amps on the verge of breakup
  • Simple control layout for easy tone shaping
  • Enhances amp's natural breakup without overpowering it

Product specs

Brand Keeley
Model Java Boost
Finish Blue
Year 2000s
Made In United States
Categories Overdrive and Boost Pedals

FAQs

What type of music is the Keeley Java Boost best suited for?

The Keeley Java Boost is ideal for classic rock and blues, as it enhances treble frequencies and provides a rich, harmonic overdrive that complements these genres well.

Does the Keeley Java Boost work well with all types of amplifiers?

The Keeley Java Boost is particularly effective with tube amplifiers, as it can drive them into a natural-sounding overdrive, but it can also enhance solid-state amps by adding clarity and presence to your tone.

How does the Keeley Java Boost differ from a standard overdrive pedal?

Unlike a standard overdrive, the Keeley Java Boost specifically enhances treble frequencies, resulting in a brighter tone that cuts through the mix, while also driving your amp into a natural overdrive.

Can the Keeley Java Boost be used with both single-coil and humbucker pickups?

Yes, the Keeley Java Boost is versatile and works well with both single-coil and humbucker pickups, adding clarity and sustain to your sound regardless of the pickup type.

What power supply does the Keeley Java Boost require?

The Keeley Java Boost can be powered by a standard 9V battery or a compatible 9V DC power supply, making it easy to integrate into most pedalboards.

ProGuitarShopDemos

ProGuitarShopDemos

Keeley Java Boost Treble Booster Pedal

Video thumbnail for Keeley Java Boost Treble Booster Pedal by ProGuitarShopDemos

Keeley Java Boost Treble Booster Pedal

ProGuitarShopDemos

ProGuitarShopDemos

Video thumbnail for Keeley Java Boost fuzz treble booster guitar effects pedal demoed with a Strat by gearmanndude

Keeley Java Boost fuzz treble booster guitar effects pedal demoed with a Strat

gearmanndude

gearmanndude

Video thumbnail for Keeley Java Boost and Keeley TS9 Demo by Bear Rose

Keeley Java Boost and Keeley TS9 Demo

Bear Rose

Bear Rose

Video thumbnail for Keeley Java Boost | Reverb Demo Video by Reverb

Keeley Java Boost | Reverb Demo Video

Reverb

Reverb

Video thumbnail for Keeley Java Boost Demo.avi by AskAGuitarPro

Keeley Java Boost Demo.avi

AskAGuitarPro

AskAGuitarPro

Reviews

PROS

  • Three distinct modes: treble, mid, and low boost for versatile sound shaping

  • Excellent for solo boosts, adding sparkle and prominence to notes

  • Enhances blues solos with glassy neck pickup tone

  • Fattens bridge pickups with a slight fuzz, great for slide playing

  • Pairs well with drive pedals for diverse sound creation

  • Sweetens tone in older, darker amps like Vox and Marshall

  • Offers classic 70s rock tones, from Brian May to Clapton

  • Works exceptionally well with tube amps for rich sound

  • Can be used to adjust guitar tone controls, reducing harsh highs

  • Continues to be a favored staple despite being discontinued

CONS

  • Produces noticeable noise when engaged, especially in non-solo contexts

  • Not compatible with all amps; better with specific models like Vox and vintage Marshalls

  • Footswitch can develop noise/cut-out issues over time

  • May cause tube damage in less stable amps like Marshall Majors

4.5 out of 5

Based on 0 Reviews and 9 Ratings

5 star
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Artist usage

Add artist
See how Ray Toro uses Keeley Java Boost

Ray Toro

Singer, Guitarist

My Chemical Romance

...
Verified via Twitter

In this Tweet, posted by Toro, the Keeley Java Boost is visible.

See how Devin Townsend uses Keeley Java Boost

Devin Townsend

Singer, Guitarist

The Wildhearts

...
Verified via YouTube

In this video Devin talks about his gear, including this one used in conjunction with Casualties of Cool.

See how Isaiah Mitchell uses Keeley Java Boost

Isaiah Mitchell

Guitarist

Howlin Rain

...
Verified via Isaiahmitchell

Listed under "treble boosters" on his site

See how Smith Curry uses Keeley Java Boost

Smith Curry

Guitarist

Erasure

...
Verified via Photo

In a user-uploaded photo, Smith Curry is shown using the Keeley Java Boost guitar pedal.

Album Usage

The Keeley Java Boost has been featured on the following albums:

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 Keeley Java Boost, it is most commonly used with the following gear.

3 alternative and related items for Keeley Java Boost, curated by the Equipboard community.

Keeley Java Boost (2018 Custom Shop Edition)
Vintage or Discontinued similar sound mod

A later, limited edition version of the Java Boost, built around a Russian MP41A germanium transistor.

Dallas Rangemaster Treble Booster

$3,470.79

Vintage or Discontinued similar sound high-end alternative

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