The HP-X Percolator Fuzz by Vaderin is a versatile distortion pedal inspired by the harmonic percolator.

Whether you are searching for a harmonic-rich low gain overdrive distortion or a pedal that can achieve blown out gated fuzz tones, the HP-X is a solid choice for all types of rock music.
The pedal captures the signature even-order overdrive of the original harmonic percolator without compromising stability or volume and has variable input impedance so it sounds great anywhere in your signal chain.

The HP-X sticks to the basics and offers the traditional two controls plus a clipping selection switch.
This pedal is very versatile with a wide variety of tones that range from overdrive to distortion to fuzz with many versions of each in between.
Whatever the settings, the HP-X always sounds aggressive, punchy and has plenty of output.

An A/B’d a ton of silicon transistors to replace the germanium transistor from the original circuit.
The percolator has a silicon transistor instead of a germanium transistor in the PNP position.
Both of the silicon transistors that make up the circuit are measured and carefully selected so the circuit biases right every time.

Left Knob: Harmonic , the left knob is the input level, turn left for less and right for more.
Turning the knob to the right increases the compression, distortion and overall gating of the pedal from nice even=order overdrive to totally squished out gated fuzz.
Adjust this knob to work with the pedal that comes before the percolator if it is later in the chain.
Right Knob: Balance
The right knob is the output volume, turn left for less and right for more.
Both knobs are highly interactive!
There are 3 clipping options on the HP-X with a Switch: • Left: Asymmetrical Germanium Diode Clipping
• Center: Diode lift for all transistor Distortion
• Right: Symmetrical Silicon Diode Clipping
The two diode clipping options were tweaked to have a similar volume output to one another while still retaining their unique clipping characteristics.

Product specs