Silktone Expander

It’s a pre.

It’s a drive.

It’s a fuzz.

It can do clean.

It can do dirty.

…It’s a tone expander.

Silktone Expander takes the simple idea of a dirt box and blows it wide open. Three knobs and a voice switch unlock a massive palette of thick, textured drive - from subtle harmonic enhancement to rich, gritty overdrive that feels like your amp just sprang to life.

The design pulls inspiration from the aesthetic and vibe of the Micronaut line and the quirky magic of old Japanese dirt boxes that Silktone has been obsessed with lately. The look, the feel, and even some of the tonal DNA tip their hat to that era while pushing it into new territory.

The first stage is a JFET-based 2nd harmonic generator that immediately adds body and depth. At its heart, a germanium transistor stage (inspired by the greats of the 60s) delivers that unmistakable chewy, colorful character. And at the output, another JFET is voiced to emulate the first tube in an amp so even when the volume is rolled down, you still get that saturated first-tube sweetness. Honestly, before adding the output stage Silktone almost didn’t put a volume knob on this thing because it sounded too damn good cranked… so they built a whole stage to make sure it sounded just as good turned down.

The controls are minimal but deeply interactive.

• Gain takes you from low, asymmetric thickness to medium-gain grind that rounds into smoother odd-order harmonics as you push it.

• Choke sculpts the low end from huge and full to focused and aggressive.

• Volume balances it all without losing that amp-first-tube feel.

The three-way Voice switch fine-tunes the flavor:

• Left = dark and rolled off for higher gain settings.

• Right = bright, perfect for “always-on” sparkle.

• Center = the standard voice, colorful and balanced.

And here’s the kicker: while it can rip when you want it to, the Expander shines as an always-on pedal. With “choke” and “gain” set low and volume around noon, it just makes everything bigger, better, and more alive.

Call it a harmonic expander, distortion expander, or tone expander - whatever you call it, the result is the same: your sound, expanded.