Lab Rat kit

Item number: 4785

Tube Rat.

Category: Sushi Box FX


starting from 63,00 €

Final price incl. VAT, plus shipping (mitttel)


Shipping time: 3-7 Working days


The Lab Rat is inspired by the Rat, with the output buffer removed and replaced with a 12AX7 running at high-voltage. The result is the same inherent Rat tone we all know and love, but with a little extra tube warmth and saturation on it. The original ?filter? tone control has also been scrapped in favor of a ?James? bass/treble stack for more flexibility. Lab rat also has a nice wide frequency response, so you can easily dial in killer distorted tones on bass as well as guitar.

This is a high-voltage circuit and requires special care in assembly, testing, and use!

Here is the parts list (BOM)

This kit is a creation by Sushi Box FX in cooperation with If you have any problem with the content of the kits like missing or wrong parts, please contact Musikding (Klaus) at For any technical problem relating to building this project, please contact Nathan at Sushi Box FX.

This kit contains all parts you need to build a fully functional effect pedal. One ECC83 tube is included. Not included in the kit, but also good to have:

  • Aluminium enclosure: select one from top
  • 9V DC power supply
  • 3 nice knobs for the potentiometer, up to 15mm diameter and for 6.3mm shafts
  • Decal, transfer or transparent sheets for labeling

Lab Rat docs.

Instrument: Guitar Bass
Effect-Type: Distortion

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