The Fredric Effects Accomplished Badger is an original two-stage boost pedal: an op-amp buffer/boost driving a germanium transistor gain stage. Fredric Effects describes it as usable as a sparkly clean boost, to just push an amp to breakup, or for a grittier saturated sound like a torn speaker or an overloaded recording desk tone1. The current version is the MKII, an update of the original 2016 design, and it is in production and available to buy at £14012.
A two-stage op-amp and germanium boost
The circuit is an original design, though its tones are based on some classic boost pedals, as Gearnews noted at the 2016 launch3. The signal path has two stages: an op-amp buffer/boost first, then a germanium transistor gain stage4. That split is what gives the pedal its range. Gearnews described the two characters plainly: one stage is a nice clean sparkly boost that gives you an extra push when you need it, and the other is far grittier3.
The germanium side is where the character comes from. The transistors are individually selected vintage new-old-stock germanium components, tested by the maker for optimal gain and low leakage1. Germanium transistors are the same parts behind classic fuzz and boost circuits, and testing for leakage matters because germanium behaves less predictably than silicon.
Guitar.com's reviewer, Michael Watts, found the two gain controls interact in a useful way: ramping up the germanium gain while keeping the op-amp gain low adds an enticing sizzle, and the harder you push it the closer it gets to a chewy low-gain fuzz2.
The controls and internal DIP switches
The MKII keeps its external controls simple and puts the deeper options inside the box2.
| Control | What it does |
|---|---|
| Germanium gain knob | Sets the gain of the germanium stage2 |
| Volume knob | Sets the output level2 |
| Op-amp gain trim-pot | A single mini trim-pot labeled "op-amp gain", inside the pedal2 |
| On/off footswitch | Engages and bypasses the pedal2 |
| Three internal DIP switches | More gain, soft clipping and hard clipping, for overdrive and distortion tones1 |
The three DIP switches sit on the circuit board1. With them off, the pedal behaves as a boost; switching in the gain and clipping options pushes it toward overdrive and distortion territory1. Watts found the Badger "turns refined with a throaty bark" that increases further when tinkering with the internal DIP switches2. He also noted the pedal does all this without sucking your tone when switched off, or adding noise when switched on2.
Power: 9V, run at 18V inside
The MKII incorporates an internal charge pump to run at 18V from a 9V input1. For a player, that means a standard 9V supply powers the pedal while the circuit gets the extra headroom of 18V, which typically means more clean range before the op-amp stage breaks up. Guitar.com lists the MKII as 9V mains power only2, so there is no battery option.
The MKII runs on 9V mains power only2. The internal charge pump handles the step up to 18V, so no special high-voltage supply is needed.
The original, the MKII, and where it came from
Fredric Effects, a London-based builder, announced the original Accomplished Badger in September 2016 as a two-stage boost with a germanium transistor gain stage, at a UK RRP of £9543. The MKII arrived as an update of that 2016 design, housed in a single-berth silver enclosure2. The headline change in the MKII is the internal charge pump running the circuit at 18V from a 9V input1; the two-stage op-amp and germanium architecture carries over from the original1.
What reviewers said
At the 2016 launch, Gearnews' reviewer came away impressed by the range:
"I think this is possibly the sort of thing that could end my search, as it appears to be pretty versatile and I love the fact it can get really filthy if you need it to."3
Guitar.com's Michael Watts reviewed the MKII in December 2021 and scored it 8 out of 10, concluding2:
"Looking for something more interesting than a standard clean boost? Audition the Accomplished Badger, you might like it!"2
Fredric Effects also hosts a demo video of the MKII by Joe Perkins, which walks through the pedal's controls and sounds1.
Videos
Magnetic Effects
Joe Perkins
LongFallBoots
Sources (4)
- Accomplished Badger Germanium Boost, Fredric Effects
- Fredric Effects Accomplished Badger MKII review: much more than just a clean boost, guitar.com, 2021-12-17
- Fredric Effects Accomplished Badger, gearnews.com, 2016-09-16
- Fredric Effects releases Accomplished Badger boost effects pedal, MusicRadar, 2016-09-15




