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Keeley Java Boost Guitar Effects Pedal  

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The Java Boost guitar pedal from Keeley Electronics brings back the same incredible response and sound quality of the heralded late '60s treble boosters, and with more control over the output frequenc... Click To Read More About This Product


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The Java Boost guitar pedal from Keeley Electronics brings back the same incredible response and sound quality of the heralded late '60s treble boosters, and with more control over the output frequencies range and boost gain. Handcrafted with the finest components, including the NOS Mullard OC44 transistors used in the '60s original. Especially killer in front of a tube amp. Cream colored knobs and violet LEDs.

  • Sound and response of the legendary '60s treble boosters
  • Enhanced control
  • Handcrafted
  • Uses the same transistors used in the original

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
KeeleyJava Boost Guitar Effects Pedal

(based on 3 reviews)

Ratings Distribution

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  • 1 Stars



Reviewed by 3 customers

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Absolute Must Have!!!!!

By Bob

from Mt. Airy, NC

About Me Experienced

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Verified Buyer


  • Compact Design
  • Excellent Sound Quality
  • Responsive
  • Versatile


  • None

Best Uses

  • Amateur Recording
  • Events
  • Home Studio
  • Performances
  • Professional Recording

Comments about Keeley Java Boost Guitar Effects Pedal:

This pedal is a "must have". Does something incredible to your tone. Doesn't matter Les Paul or Strat or anything else, fuller,fatter, creamier,brighter, clearer. This pedal does everything I wanted it to do. Stays on almost all the time. Expensive? A Little. Worth it? Heck yes!!!!! Will Never leave my board!!!!!!

(4 of 4 customers found this review helpful)


Terrorize your tube amp!


from Rochester, NY

Comments about Keeley Java Boost Guitar Effects Pedal:

That's what these pedals do and they do it THE BEST! The voicing and treble cut control (tone) are great features as well. I don't find the full boost too useful, it is too dark and muddy for most amps/cabinets but the mid boost is the JAM for single coils - really brings that extra cohones for solos or heavy riffs. The original treble boost is pretty useful for both singles and humbuckers - it cuts through! The tone is spectacular with a tube amp although it has to be on the verge of breaking up or already overdriven. The pedal then kicks it up a notch and drives the tubes hard and adds a little of it's own grit - yet it doesn't take away the tubyness of your amp. I use this and my volume control/pup selector and can get a range of tones out of one amp setting - really great for guys like me who aren't toe tappers and rely on the amp/guitar/cabinets tone. Only a couple flaws but nothing that wouldn't stop me from buying another is that it is fairly noisy (you don't want to leave it on with you are not playing) and the knobs seem to drift a bit after a few stomps - the pots aren't super tight.

(9 of 11 customers found this review helpful)


I take my Java straight

By Dbick

from Texas

Comments about Keeley Java Boost Guitar Effects Pedal:

This is an outstanding pedal. This is "THE" pedal for my setup and style. This pedal is made to be pushed and played loud and it does not sound great until you get your amp above 3 or 4. Above that and this thing comes to life. Very awesome voicing. It just has a way to cut though. I have played for over 20 years and this is my favorite. I have many vintage originals but this is the one for me. I stick mainly to rock. I usually always have this pedal on and just adjust my volume on my guitar. Goes from an acceptible clean to a very dingy dirty Class A type boost. This is a very reactive pedal to your playing style. You need to buy this one.. I understand they are not going to be around forever. I actually bought a spare because this is one I would not be able to do without.

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