KMA Machines Mandrake Octo-Shrieker Octave Fuzz Effects Pedal

The KMA Machines MANDRAKE Octo-Shrieker is designed to be the most flexible analog upper-octave pedal ever built. Based on the refined Shriek circuit from the MOAI MAEA, MANDRAKE delivers an even more powerful, present, and versatile octave-up experience. From subtle tone enhancement to crushing dual-octave fuzz, this pedal brings elevated tonal euphoria to any rig.

With its discrete transistor-based fuzz, 2nd-order pre-gain filter section, and intuitive TIMBRE and FILTER controls, MANDRAKE offers a huge range of octave tones, from edgy shrieks to smooth synth-like blooms. Independent dry and octave mix controls allow you to dial in everything from subtle textures to full-on doom-laden saturation. Handmade in Berlin, this compact, pedalboard-friendly beast makes octave-up effects not only more versatile, but more controllable than ever.

Main Features

• Analog Upper Octave Pedal – from subtle enhancements to dual-octave fuzz
• Ultra-Fast Tracking – precise performance for any instrument
• Discrete Transistor Fuzz – enhanced rectification circuit for a robust octave
• Active Pre-Gain Filter Section – optimises signal for superior octaval tones
• FILTER Control – tame upper harmonics or bloom into synth-like textures
• TIMBRE Control – adjust fuzz gain for tones from crunchy to saturated
• Independent DRY & OCT+ Mix Controls – precise tonal balancing
• Compact Enclosure – top-mounted jacks for easy pedalboard integration
• Silent Relay-Based Switching – true bypass with soft switching
• Handmade in Berlin, Germany
• Power: 9V DC (centre -, 2.1mm, >30mA)

Sound & Performance

Octave-up pedals have shaped iconic tones for legends like Hendrix, Iommi, Josh Homme, Billy Corgan, and Jack White. MANDRAKE expands on that tradition with a versatile circuit that avoids clashing overtones and adapts seamlessly to different instruments and pickups.

• FILTER: Cuts or blooms harmonics for aggressive shrieks or smooth textures
• TIMBRE: Dial in gain character from subtle crunch to doom-metal saturation
• Mix Controls: Blend dry and octave signals for clarity, punch, or chaos

Whether you want shimmering melodic overlays, cutting octave leads, or massive fuzz-driven walls of sound, MANDRAKE lets you choose between subtle descant or full octaval Armageddon.

Specifications

• Type: Analog Upper Octave Pedal
• Controls: TIMBRE, FILTER, DRY, OCT+ mix
• Circuit: Discrete transistor fuzz with enhanced rectification
• Bypass: Silent relay-based true bypass
• Enclosure: Compact with top-mounted jacks
• Power: 9V DC PSU (centre -, 2.1mm, >30mA, not included)
• Build: Handmade in Berlin, Germany

The KMA Machines MANDRAKE – unleash screaming upper-octave tones, from subtle enhancements to devastating fuzz. A versatile octave-up pedal for guitarists seeking total control.