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Products | Tweaker | Optical Expression Device |

An effect pedal for sonic experimentalists, not for mundane guitar cornballs – that’s what the Tweaker pedal from a NYC based musical electronics company amukaT Gadgets is all about.

The oscillation sounds of the Tweaker will make the most out-there free-jazz horn blowers and definitely, Williamsburg fake-ass rockers, put their instruments down and listen.

In addition to being a wild oscillator, the fuzz sound of the Tweaker cleans up nicely and generates emotionally charged classic fuzz tones. The Tweaker’s internal circuit is inspired by many legendary fuzz boxes, which is apparent in its overall sound quality.

The oscillation sounds, reminiscent of dub siren, are playable with the knobs and the switches. The playability as an instrument sets the Tweaker apart from its inspirations.



FUZZ: Controls the amount of distortion. Back off on the Fuzz knob and bring up the Volume knob to use the pedal as a booster that pushes your amp to overdrive. This knob also alters the oscillation sound characteristics.

VOLUME: Controls the overall volume. The Tweaker has a huge amount of available gain, so don’t think you have to have it up at 10 all the time. This knob is also an oscillation controller.

FEEDBACK: Changes the amount of Feedback that creates the oscillation. This knob is activated when the Feedback ON/OFF switch is set to ON.


TREBLE/BASS: You can get two distinctively different sounds out of one instrument plugged in. The Treble sound cuts through the mix and the Bass setting preserves the low end, suitable for fat fuzz sound.

FEEDBACK: When set to ON, the Feedback circuit is engaged and the oscillation kicks in. When set to OFF, the Feedback circuit is activated only when the Momentary Switch is pressed.

MOMENTARY SWITCH: This playable switch is activated when the Feedback switch is set to OFF. The oscillation sounds are heard only when this switch is being pressed.


  • The volume knob on the guitar acts as another oscillation control.
  • True Bypass.
  • Some settings would make the Tweaker sound like a Ring Modulator.
  • Pulsing Tremolo sounds can be achievable by some settings.
  • Infinite feedback sustain can be obtained by dialing in the knobs just right and by pressing the “Momentary Feedback On” button.
  • Octave up and down sounds can be created.
  • Experiment with connecting other effects such as a wah-wah before or after the Tweaker.


Use 9 volt battery or center minus 9 volt AC adapter with 2.1 mm plug. Access the battery compartment by removing the 4 screws on bottom. Be careful not to damage the screw holes. Remove the plug from the input jack when not playing to conserve battery. When the AC adapter is plugged, the battery is disengaged.

Optical Expression Device:

The "Optical Expression Device” can be hooked up to the Tweaker. It acts as a light sensitive oscillation controller.  You can also hook it up to any other effects with an expression out.

The "Optical Expression Device” is sold separately from amukaT Gadgets.
Tweaker is completely handmade in New York City using the highest quality parts.
Demo Videos:







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Also available at the following stores :

Rivington Street Guitars
125 Rivington St
New York, NY 10002
(212) 505-5313

30th Street Guitars
36 W 30th St
New York, NY 10001-4904
(212) 868-2660

Ludlow Guitars
164 Ludlow Street
New York, NY 10002
(212) 353-1775

Main Drag Music
330 Wythe Ave
Brooklyn, N.Y. 11211
(718) 388-6365

Southside Guitars
742 Driggs Ave
Brooklyn, NY 11211-5305
(718) 218-8201


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