Keeley Java User Manual
Keeley Ja va Boost
Congratulations on your purchase of the amazing, new Java Boost! You now own one
of the most musical and rewarding boost pedals ever built. Handcrafted with the finest
current manufacture components and a secret stash of NOS Mullard transistors (the
very ones used in the original pedals), this pedal offers the same incredible response
and sound quality of the heralded late sixties treble boosters, with new ways to control
the range of output frequencies.
Level Control and Notes on Output
e Level Control boosts the range of frequencies selected by the Tone Switch. e
higher the level is set, the greater the amplification or boost of your treble, mids or
full range frequencies. As this unit is capable of extremely high levels of boost, you
may want to start with the level control in the noon position or below. With respect to
the original pedal that the Java Boost is based on, the level control here replicates that
pedal’s single boost dial.
e rare Mullard OC44 transistor, at the heart of the Java Boost’s circuit, naturally
distorts quickly, rendering it unsuitable as a pure clean boost. While the boost is extremely transparent and responsive to
pick dynamics, it’s better described as an overdrive, blending its own distortion with your amp’s gain structure.
e Java Boost’s best results are achieved with tube amps, driving your preamp into creamy distortion and evoking
incredible punch from your power section. While it generally works best as the last effect before your amp, we understand
that you may be using a variety of other pedals. e Java Boost will typically sound better after compressors and we
recommend you try it before delay or reverb pedals. It also sounds very good before many distortion units, utilizing its
treble and mid push to really make the circuits sing!
Tone Control
is is simply a low-pass filter that removes upper guitar frequencies. e unit will sound most like the original late
sixties treble booster when dialed fully clockwise. Turning it counterclockwise will reduce the highs. is may be helpful
when playing through bridge pickups or bright equipment. I actually prefer it in the full up stock” position, but the
addition of this control to the classic circuit makes it possible for the unit to mate perfectly with any style or rig.
Tone Switch
Underneath the Tone Control is the 3-way Tone Switch, providing you with the incredible boost characteristics of
three classic pedals in one silver box. From the treble-boosted tone of Dick Dale’s surfin’ safari to Clapton’s mid-heavy
“Layla” and the fullrange assault of Sabbath’s “War Pigs,” this switch makes all the great pushed tones possible. e
switch itself is actually a very slick, sturdy, and tidy toggle that’s designed to hold your setting even in the unlikely event
it gets bumped. Simply move it to the desired setting--pick hand, fret hand... we don’t mind which! We just ask that
you please take care when switching; that is, please don’t switch positions with your foot.
Tone Switch Positions
Switch to Left
Switch to Center
Switch to Left -- Full-range Boost
•
Switch to Center -- Classic Treble Boost
•
Switch to Right -- Mid-range Boost
•
Switch to Right
Bypass
Yes, the Java Boost is a true-bypass effect! As with all true-bypass effects, the switching is not perfectly silent and you
may need to stomp the switch a few times after you power up, in order to alleviate any temporary charge or voltage on
the capacitors. From then on, you should enjoy typically quiet operation.
Batteries and Power Supplies
e Java Boost will operate on a single 9-Volt battery or a regulated 9-9.6 Volt DC power supply. e DC supply should
be the standard barrel type with negative tip and positive outside sleeve, as is used with most of your other effects. We
have designed this circuit to have a negative ground supply and it should outperform all other Treble-Rangesters!
Internal Controls
Yes, there are internal controls, but they are not designed for user adjustment. ese are included to optimize your
particular Mullard OC44; yet another reason the Java Boost is better than all other treble boosters! Should you
“accidentally” adjust these, you’ll need a voltmeter and the schematic to return the trim pots to their proper settings.
(Contact us via email and we’ll get it to you.)
Thank You!!!
I am sure you will be happy with this guitar effect, as it is one of the best we offer. Including a genuine NOS Mullard
OC44 transistor, a sturdy, compact 3-way switch, ultra bright purple LED, true-bypass switching, metal film or better
grades components and our promise of stellar customer service, we are confident that you have the best Treble Boost
available. e entire Keeley team thanks you for your business. You’re keeping the good tones alive!
Robert Keeley, BSEE
email: fx@rkfx.com
site: www.robertkeeley.com & www.rkfx.com
Keeley Electronics, 6400 Industrial Blvd. 2nd Floor, Edmond, OK 73034
SHOP TELEPHONE NUMBER 1-405-341-2025 TOLL FREE 1-8668-go-rkfx (1-866-846-7539) / email: fx@rk fx.c om
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