Congratulations on your new JangleBox J-Boost!
A combination of strength and refinement, the JangleBox J-Boost provides unsurpassed tone-shaping capabilities and power to spare. Unlike other boosters, the J-Boost is a total EQ boost — with treble, bass and mid controls — not just a glorified volume knob. Once you’ve dialed in the perfect tone, the master control allows you to maintain that sound while adjusting the output lower or louder.
The clean, non-compression J-Boost is the perfect companion to any JangleBox compressor, and a stand-alone enhancement to virtually any pedal in your rig.

The J-Boost Special Features

  • Unparalleled tone refinement. Unlike some other boosters, the J-Boost is a total EQ boost — with treble, bass and mid controls — not just a glorified volume knob.
  • Full tone flexibility. By adjusting a single tone knob you can use the J-Boost as a treble boost, bass boost or even a mid boost. Or you can tweak your overall tone to perfection by eliminating low-end dullness or ice-picky highs.
  • Ultra clean output. Yes, the J-Boost can help drive your amp to the breaking point if you want, but the distortion-free circuit is designed to deliver pristine tone and clarity.
  • Because the Attack and Gain knobs on most compressor pedals are interactive (as on all JangleBox compressors), it can be very difficult to create louder output volume with low-level compression. The J-Boost fixes that by allowing you to lower your compressor’s Attack to just a hint of compression and still get a clear, booming output.
  • Use the J-Boost with any JangleBox compressor to create an unbelievable richness and depth of tone. And by combining the J-Boost with our JB3, you can even create a boost-on-boost-onboost!
  • If you use a 9V battery to power the J-Boost, power will decrease as the battery wears out. Remove the four screws on the underside of the box to replace the battery.
  • True bypass, like all JangleBox pedals.


The JB-Boost operates with either a regular 9V battery (supplied) or 9V DC power adapter, pin negative polarity, 100 mA or greater.

WARRANTY: JangleBox LLC warrants that the JB-Boost shall be free from defects. Consumer must notify JangleBox LLC in writing, within one year of delivery of the JB Nano, of any claim that there is a defect in the JB Nano. If the JB-Boost is found defective by JangleBox LLC, its sole obligation under this warranty is to remedy such defect in a manner consistent with JangleBox LLC’s regular business practices.
The above is a limited warranty and it is the only warranty made by JangleBox LLC. JangleBox LLC makes no other warranty express or implied and expressly excludes all warranties of merchantability and fitness for a particular purpose. JangleBox LLC shall have no liability for consequential, exemplary, or incidental damages resulting from or arising out of the use of the JB-Boost.

Copyright ©2016–2023 JangleBox LLC

Note: This User's Manual is adapted from the official manual created by JangleBox in PDF format, without modification of the content. We just rewrite the PDF, into responsive mobile friendly pages.So, you can read this document anytime and anywhere.

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