The Granith Grey Booster allows a high-quality boost of up to +15dB with minimized switching noise due to BJF engineered circuitry.  This booster is able to attain the equivalent S/N ratio of a high-end amplifier.  In order for this to happen, the circuitry was created to fit the frequency range of an electric guitar, which lowers some overtones that coud otherwise be present with other boosters.


  • Input impedance: 500K
  • Output impedance: 2K
  • Maximum gain:+ 15dB
  • Drive voltage: 8.8V~9.6V
  • Current consumption: 1mA
  • S/N ratio: 115dB
  • Total harmonic distortion rate: 0.006% (1 kHz)
  • Size:39Wx100Dx31H mm (excluding protruding parts)
  •        47Wx100Dx48H mm (including protruding parts)
  • Weight: Approx. 140 grams​
  • True-Bypass Switching
  • High Quality Aluminum Enclosure
  • Power: 9V Battery or Standard DC Power Supply


Bjorn's Description
A clean booster is simply a pedal that amplifies signals. The concept is simple, however due to the various uses for this type of pedal, it is a complicated feat.  
What kind of booster is necessary to maximize performance in any situation? We set out on a quest to find the answer.

Granite is a rock whose name originated from the Latin word Granum, which means “grain seed.” It was thus named Granith with the hope that this product would send out strong roots into the world.  A booster is a pedal that amplifies incoming signals. If the incoming signal has noise in it, the noise is also amplified. This is an undeniable fact. However, you don’t have to compromise by thinking that this is unavoidable when you use a booster. 

Try a truly noiseless booster. A world you’ve never experienced will unfold before you.

The One Control Granith Grey Booster is thoroughly dedicated to low noise. From the circuit design stage, we tried to eliminate noise up to the limit of possibility.  After repeated consultations between BJF and One Control, the booster now has a completely newly-designed circuit by BJF.  It is full of BJF’s unique ideas that are unlike conventional circuits. The case is made of high quality cut-out aluminum to protect the precious sound signals from inside and outside noises. It is also much more durable than die cast cases.

As a result, the Granith Grey Booster went beyond the capabilities of a compact pedal and attained an S/N ratio equivalent to a high-end vacuum tube audio amp. 

Relevant and Easy-to-Handle Boost
The One Control Granith Grey Booster allows a boost of +15dB. You might think this is nothing extraordinary but we went through a number of tests to ensure this was sufficient.  After repeated tests at different decibel levels, it turned out that securing a +15dB boost was sufficient for various scenarios, all while maintaining the natural usability of any equipment with any connection.  If you turn the level knob down to the minimum, you can mute the sound and which allows you to set the level cut and unity gain.

Pure Tone & Texture
The frequency characteristic of the Granith Grey Booster is unique.  If you turn up the output without changing the frequency characteristic of incoming signals, you won’t be able to ignore the unnatural 'feeling' it creates. This discomfort is caused due to the difference between the frequency characteristic at the original output level and the actual output level.  
The Granith Grey Booster creates the necessary frequency characteristics while the signal passes through the circuit.  By doing so, the Granith Grey Booster realizes a pure and high quality boost sound without compressing the sound or narrowing the dynamic range. 

Suitable For Any Guitar, Bass or Equipment
The One Control Granith Grey Booster secured the 500kΩ input impedance to support any guitar and bass. You can use it by directly connecting any guitars and basses.  From single to hum-bucking or from active to passive, The Granith Grey Booster does it all.


One Control Granith Grey Booster

$124.00 Regular Price
$99.00Sale Price
  • Shipping is free to the US.

    Please contact me for shipping to other regions.

  • 7 day refund less shipping