FB-3 – HomeToneBlog.com

7th April 20266th April 2026

First Impressions: Fulltone Fat-Boost FB-3

I recently picked up a second-hand Fulltone Fat-Boost FB-3.

This is a photo of my Fulltone Fat-Boost FB-3 guitar effects pedal.

The pedal comes in a metallic silver case. Input and output audio jacks are on the side. 9V power is on the left-hand side of the pedal, close to the output audio jack.

There are five controls shown on the top of the pedal:

- two large knobs at the top, for output volume and drive (a bias control for the internal FET)
- two small trim pots, one labelled "Bass" and one labelled "Treble" — The Fulltone Fat-Boost FB-3, on my pedalboard.

What do I think of it? Here are my first impressions.

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