Dwarfcraft Eau Claire Thunder Gold Standard

The Eau Claire Thunder Gold Standard is a limited-edition version of the Eau Claire Thunder, the flagship distortion pedal from Wisconsin builder Dwarfcraft Devices. Announced in May 2019, it reworks the original circuit with germanium clipping diodes and NOS (new-old-stock) Fairchild 2n5133 transistors, packs it into a smaller enclosure with top-mounted jacks, and drops the feedback loop section that made the original Thunder famous among experimental players¹².

The component swap changes the character. According to the builder's own description, the NOS transistors decrease the gain, making this version of the circuit warmer, a little more "wooly," and somewhat more versatile than the original¹³. Delicious Audio summed it up as not as extreme as the original, but more detailed⁴.

A warmer, woolly take on the Eau Claire Thunder

The original Eau Claire Thunder was, in Delicious Audio's words, "the pedal that put Wisconsin's pedal builder Dwarfcraft Devices on the map in the early aughts"⁴. Its name comes from the bad weather of the company's hometown, Eau Claire, Wisconsin⁵. At its core is a standard volume, tone, gain arrangement, and Delicious Audio's 2012 review described the result as "a distortion that is much less tubby and bouncy than a Muff derivative"⁶.

The Gold Standard keeps that lineage but shifts the voicing. The gain is lower than on the standard version, and Gearnews described the result as a warmer circuit that is a touch more woolly². Guitar World's announcement framed it the same way, reporting that the use of NOS transistors decreased the gain, making the circuit warmer, a little more "wooly," and somewhat more versatile than what it called the balls-out original¹.

For a player, that means the Gold Standard leans less on sheer aggression and more on texture. Gearnews' reviewer, listening to the available demos, called it "a warm-sounding boutique dirt/fuzz box that could be perfect for down-tuned riffs and sludgey guitar chords," while admitting it is an acquired taste².

Controls and layout

The Gold Standard carries four knobs, a toggle, and two footswitches, a simpler panel than the original Thunder's².

The Toneblast switch is the one to know about: kicking it takes the tone control out of the signal path, which the announcement described as giving more volume and a fuller frequency response³. The Timewarp toggle switches a clipping diode, changing the clipping character¹³.

The enclosure is a smaller, streamlined box with top-mounted jacks, which Gearnews noted makes it "a bit friendlier with your average pedal board" than the original². The original Thunder was housed in a die-cast enclosure with sturdy metal construction and heavy-duty footswitches⁶.

Germanium diodes and NOS transistors

The Gold Standard's name refers to its component choices: germanium clipping diodes and NOS Fairchild 2n5133 transistors, selected for what the announcement called a vintage Muff vibe¹²³. Germanium diodes clip at a lower threshold than the silicon diodes in most distortion pedals, which is part of why the builder describes the result as warmer and woollier rather than harder-edged.

The NOS transistors are also the reason the run was limited. The press release stated that because of the choice of transistors, only a small number could be built, since the Fairchild 2n5133 is a vintage part available only in leftover stock³.

Does the Gold Standard have the feedback loop?

No. This is the biggest functional difference from the original. Delicious Audio reported that the Gold Standard is "more compact and streamlined," stripped of the feedback loop section, meaning the Feedback footswitch and Feedback Tune knob are gone⁴.

On the original Thunder, that feedback loop was a signature feature: the Feedback Tune knob tunes an internal feedback loop's oscillation frequency, letting the pedal self-oscillate into squeals and other noises⁶. Players who want that behavior need the original, not the Gold Standard.

Limited edition and versions

The Gold Standard was a one-time limited run, and the press disagreed on exactly how many were built¹²⁴:

• Premier Guitar's press release: 65 units³
• Guitar World: 73 pedals¹
• Gearnews: 73 units worldwide²
• Delicious Audio: a limited run of 70 units⁴

The run was constrained by the supply of NOS Fairchild 2n5133 transistors³. Whatever the exact count, all of these figures describe a small batch, and the pedal is long sold out.

Where it sits in the fuzz and distortion overlap

The press split on what to call it. Guitar World called it an update of the company's flagship distortion pedal¹; Gearnews called it a boutique dirt/fuzz box²; Delicious Audio called it a Muff-style fuzz box⁴. All three fit, because the underlying Eau Claire Thunder circuit is Big Muff-derived. Coda Effects' technical analysis of the Big Muff circuit notes that the Thunder takes a Muff-style circuit and removes the tone stack, giving what it calls an "in your face" sound with a lot of mids⁷. That mid-forward, tone-stack-less design is why the Thunder reads as more aggressive and less scooped than a typical fuzz pedal, and why the Gold Standard's lower-gain, germanium-clipped take on it lands closer to warm sludge than buzzsaw.

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