Al- Chemist Booster (OC139)


We know that for the past 60 years, we’ve been stuck with this eternal booster, and it’s likely that this booster is one of those circuits that will continue to be replicated from the mid-20st century until who knows when. At least until people think they no longer need a treble booster.

That’s why we’re also very excited to create our own version. With some adjustments that we believe suit with how people in the 21st century use pedal effects, especially booster pedals. One of our decisions was to use the 125B enclosure (Pedalboard Guy definitely loves this), and then we added a “Headroom” knob, which basically controls the transistor bias, along with a switch to select frequency response (because we’re sure people in the 21st century don’t just want to boost the treble, lol). And of course, we didn’t forget to provide the option of using different types of transistors, Germanium & Silicon. Even though Germanium transistors are no longer being produced today, fortunately, there are still thousands of hidden Germanium transistors out there. Besides, don’t we all worship this chemical element?


1 in stock



This pedal is equipped with:


-Boost: to adjust the desired amount of gain.

-Headroom: to adjust the transistor bias, which affects the output headroom.


-Spectrum: to select the frequency to be boosted, with options for top (treble), mid, and full (adding bass response).

-Atomic elements: to choose the type of transistor based on its chemical element: germanium and silicon.

-Footswitch: This pedal features a digitally controlled true bypass relay system. What makes this feature special? Say goodbye to click/pop noise! Not only that, there’s also a smart momentary bypass/unbypass feature. Simply press and hold the footswitch for 20ms, and the pedal will automatically enter smart momentary mode. Release it to return to normal mode. Sounds very 21st century, doesn’t it?

Power Supply:

Since the transistors used is of the PNP type, it requires a negative voltage to operate. This can be quite inconvenient because currently, 99% of pedal effects use positive voltage, making it extremely difficult to find a power supply unit that specifically provides negative voltage. That’s why we also provide a voltage inverter circuit that automatically converts standard power supply into a negative supply internally.