The Stomp Under Foot Silver Foxx is an octave fuzz pedal, a recreation of the 1971 Foxx Tone Machine fuzz pedal with a little more gain on tap than the original1. It is built by Matt Pasquerella, the builder behind Stomp Under Foot, and made in the USA1. The pedal carries a list price of $1892.
An octave fuzz with extra gain on tap
The Silver Foxx aims to deliver the thick fuzz the Foxx Tone Machine originals are known for. Stomp Under Foot describes the gain control as going "from a warm overdrive to full-out, massive, fat fuzz that gives you thunderous chords and sweet" lead tones3. Two changes set it apart from the pedal it copies: the tone control was modified for a fuller sweep from high to low, and there is a little more gain on tap than the original had3.
The octave circuit is where the germanium comes in. It uses NOS germanium diodes, which Stomp Under Foot says create screaming leads and ring-modulation-style tones3. gearnews.com, covering the release, described the pedal in the context of a staple sound: "Screaming octave fuzz is a staple of rock and blues guitar"1.
The controls and footswitches
The Silver Foxx keeps the layout simple: three knobs and two switches.
| Control | What it does |
|---|---|
| Level | Output level1 |
| Tone | Tone control, modified for a fuller sweep from high to low31 |
| Fuzz | Fuzz amount, from warm overdrive to full-out fat fuzz31 |
| Octave footswitch | Engages the octave circuit separately31 |
| On/Off footswitch | Bypasses the pedal1 |
The separate octave footswitch is the practical difference from the original Foxx Tone Machine, which reached its octave function with a side-mounted toggle switch4. On the Silver Foxx you can leave the octave off and use the pedal as a straight fuzz, then bring the octave in with a stomp.
The original Foxx Tone Machine came covered in a velvet-like material. Stomp Under Foot had the Silver Foxx powder-coated in a crushed velvet finish as a nod to that look3.
Where it came from: the Foxx Tone Machine
The Silver Foxx is Stomp Under Foot's take on the velvet-covered fuzz octaver of the early 1970s. Builder Eric Schreiber notes that the original pedal came covered in a velvet-like material, so the Silver Foxx pedals are powder-coated in a crushed velvet finish instead3. It is not a straight copy: the tone control was modified for a fuller sweep from high to low, and there is a little more gain on tap than the original3.
Stomp Under Foot is far from the first builder to revisit the circuit. Delicious Audio maintains a roundup of Foxx Tone Machine clones and evolutions, of which the Silver Foxx, at $189, is one entry2. Other takes on the design include the MXR Custom Shop La Machine, reviewed by Premier Guitar4.
Videos
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Questions
Does the Stomp Under Foot Silver Foxx take a battery?
Yes. According to gearnews.com's report on the release, the Silver Foxx can run on either a 9 volt battery or an external power supply, so it works on a board or standalone without needing an adapter.
Is the Silver Foxx made in the USA?
Yes. gearnews.com reports that the Silver Foxx, along with the Cherry Bomb announced alongside it, is made in the USA by Stomp Under Foot, the pedal company run by Matt Pasquerella.
What is the Foxx Tone Machine?
The Foxx Tone Machine is a 1971 fuzz pedal designed by Steve Ridinger Associates, known as a fuzz and octaver with a thick, saturated voice. TONEHOME calls it probably the thickest sounding fuzz on earth. It was used by players including Peter Frampton, Billy Gibbons and Adrian Belew, and its octave function was originally reached with a side-mounted toggle switch.
Can you use the Silver Foxx without the octave?
Yes. The octave is engaged by its own separate footswitch, so you can play the plain fuzz on its own and stomp the octave in only when you want the upper-octave lead voice.
Does the Silver Foxx use germanium diodes?
Yes. The octave circuit uses NOS germanium diodes, which Stomp Under Foot says create screaming leads and ring-modulation-style tones. Both Premier Guitar's press release and gearnews.com's report confirm the NOS germanium diodes.
Sources (4)
- Stomp Under Foot recreates two classic effects with the Silver Foxx and Cherry Bomb, gearnews.com, 2020-10-01
- Best Foxx Tone Machine Fuzz Clones And Evolutions In 2025, Delicious Audio, 2024-12-31
- New Stomp Under Foot Pedals: Silver Foxx & Cherry Bomb, Premier Guitar, 2020-09-28
- MXR Custom Shop La Machine Review, Premier Guitar, 2014-09-15
