I'm the original owner of this Harmonic Distortion pedal. This is a pretty rare pedal and doesn't show up much on the radar these days (as Guyatone stopped making pedals a while back). It works great and has a wonderful sound. It wasn't my choice for go-to distortion sound as I'm a jazz guitarist and prefer a more clean tone, so it hasn't really been used very much at all. I replaced the knobs on the top as I had lost one of the old ones - and the rubber gasket on the back has a little break in it (from age), but doesn't affect the workings of the unit, and could be fixed/replaced for a couple dollars. Otherwise, it's pretty flawless.

Here's the description from the Guyatone page:

The Guyatone HD-2 Harmonic Distortion pedal is a compact yet powerful addition to any guitarist's effects chain. Renowned for its unique harmonic distortion circuit, this pedal delivers a rich and dynamic sound that enhances your guitar's natural tone while adding a layer of gritty distortion. The HD-2 is designed to provide a versatile range of distortion levels, from subtle overdrive to full-on harmonic chaos, making it suitable for a wide array of musical genres.

This pedal features intuitive controls that allow for easy tonal adjustments. With its simple yet effective layout, you can quickly dial in your preferred sound, whether you're looking for a warm vintage vibe or a more aggressive modern edge. The HD-2 is built with durability in mind, ensuring that it can withstand the rigors of both stage and studio use.

Musicians appreciate the HD-2 for its ability to maintain clarity and definition, even at high gain settings. This ensures that your playing nuances are preserved, allowing your unique style to shine through. Compatible with a variety of setups, the Guyatone HD-2 Harmonic Distortion is an essential tool for any guitarist seeking to expand their tonal palette.

Key Features:

• Unique harmonic distortion circuit for rich, dynamic sound
• Versatile distortion range from subtle overdrive to intense distortion
• Intuitive control layout for easy tonal adjustments
• Durable construction ideal for both stage and studio environments
• Maintains clarity and definition at high gain settings
• Compatible with a wide range of guitar setups