MAK Crazy Sound Technology (often shortened to MAK CST) is a boutique guitar effects pedal builder based in Russia, with operations historically tied to Crimea. The company designs hand-built stompboxes that lean toward experimental and ambient territory, focusing on reverbs, octavers, delays, and other texture-oriented effects rather than conventional drive circuits.

Its catalog includes the Space Reverb, which blends plate, ambience, and shimmer modes; the Blasar, a reverb pedal with a hold/freeze signal-capture function; the Octronix, a polyphonic octaver that combines shimmer, synth-octave, and reverb voicings; the Temporal Tap Machine delay; and the Guitar Fairy multi-effects unit covering chorus, flanger, phaser, tremolo, vibrato, envelope, and reverb. The Chocoslayc is a signature pedal developed in collaboration with the Russian metal guitarist of the same name.

MAK CST pedals are produced in small runs and circulate primarily through the boutique secondary market and direct sales, where they have built a niche reputation for ambient, drone, and shoegaze-friendly sounds.

Crazy Sound has 2 products cataloged on Equipboard, including Picks & Pick Holders.