Michael W. Klein, a little-known boutique builder, is the mastermind behind some of metal's most brutal guitar tones. His Oni pedal, a high-gain collaboration with Taylor Young, has gained a reputation for its intense and chaotic sound, often leaving musicians in awe. Klein's journey into the world of guitar building began with a desire to create his own equipment, inspired by his love for heavy metal and the early internet's vibrant messageboard scene. He started with a 40-watt simplified Dumble circuit, realizing that anyone could build these legendary tube circuits. This punk commitment to accessibility is a cornerstone of Klein's approach, as he keeps prices low and focuses on helping others create the cool stuff he loves. He collaborates with artists like Sammy Duet, Matt Harvey, and Gary Holt, who appreciate his unique approach to building and designing guitar gear. Klein's latest creation, the Oni pedal, is a testament to his skill and creativity, offering a unique blend of tones that have become a favorite among musicians. Despite his full-time job, Klein's passion for guitar building remains strong, and he continues to produce small-run equipment that reflects his dedication to the craft. His work not only provides musicians with powerful tools but also serves as a means of managing his mental health, offering a creative outlet that helps him cope with depression and anxiety. Klein's story highlights the intersection of art, passion, and personal well-being, showcasing how a hobby can become a therapeutic and fulfilling endeavor.