The Eons Five-State Fuzz by Walrus Audio is a highly versatile dirt box to basically replace every fuzz you’ve ever tried. Like its brothers (Eras and Ages), it offers five different flavors. And of course it has my favorite kind of knob on a fuzz: a voltage/bias control. With all these flavors, active cut/boost bass and treble controls, the Eons offers every kind of fuzz you could think of.
The top row runs Vol, Bias, and Gain from left to right. The bottom row runs Bass, Mode, and Treb in the same order. The Bias knob is the Eons’ most distinctive control: it feeds variable voltage into the circuit, from a starved 3 volts all the way up to a full 18 volts, so you can dial in sag and gating before the Mode knob even enters the picture. Bass and Treble are active boost and cut controls rather than passive tone bleeds. The five-position Mode rotary is the main event.
In the demo above I’ve set up sweeps for the Voltage (Bias), Gain, Bass, and Treble knobs, so you can hear what each one does across the full range.
The five modes cover the main clipping families. Mode 1 (soft silicon) is smooth and compressed, well-rounded with a big sound. Mode 2 (soft silicon with added bass) stays compressed but gets crunchier and heavier in the low end. Mode 3 (soft germanium) is the “love child of distortion and fuzz”: the Rat on Steroids preset puts it at gain 8 and bias all the way up at 10, showing how much forward-pushed aggression that combination unlocks. Mode 4 (LED clipping) goes dynamically dark; the Packs a Punch preset uses it with the bass boosted to 6. Mode 5 stacks hard-clipping transistors with LED and soft silicon diodes for the rowdiest result: loud, angry, and fully compressed. The A Really Big Muff preset sits there at gain 10 with the bass up at 6.
The Velcro Fuzz preset (mode 1, gain at 10, bias at center) shows what happens when you drive the smooth silicon mode hard: it bites and spits rather than blooming. The Smooth Fuzz preset (mode 2, gain back at 5, bias at 8) is the opposite end: compressed but controlled.
The Walrus Audio Fundamental Fuzz is Walrus’s Muff-style budget option, with three modes (Gate, Classic, Mid+) via a slide switch, center-snap faders, and a straightforward footprint. The Eons is the flagship. Where the Fundamental Fuzz gives you one Muff-derived starting point and a few variations, the Eons gives you five distinct clipping architectures, an active two-band EQ instead of a single tone control, and that voltage/bias knob which adds a whole extra dimension of starved, saggy character the Fundamental Fuzz can’t reach. The trade-off is that the Fundamental Fuzz is quicker to dial in. The Eons rewards more deliberate knob-turning.
This pedal makes the most sense for players who want one fuzz that genuinely covers a lot of ground: velcro and gated, compressed silicon, dynamic germanium, and the thick stacked tones of mode 5. The bias control is especially useful if you play single-coils and want a starved, splattered character without buying a separate dying-battery simulator. It works well as a pedal-board anchor for players who don’t want to carry multiple fuzzes.
The honest caveat: six knobs plus a five-position rotary means there are a lot of variables. If you want to dial in one great fuzz sound and leave it alone, simpler options will serve you better. But if you like exploring, the Eons is one of the more complete single-pedal fuzz solutions around.
Tone quest ends here 
'Cause why not? 
Fill that empty spot Buy through these links and support Loopy Demos at no extra cost to you.
Get detailed specs on Walrus Audio's website
<div data-loopydemos="walrus-audio-eons" data-title="Walrus Audio Eons | Loopy Demos" data-width="400" data-height="610"></div>
<script src="https://loopydemos.com/embed.js" async></script>To embed this demo on your website, copy & paste the code above or customize your demo widget