Lefty's Sound Lab is a small custom shop based in Rostov-on-Don, Russia, founded by Vladimir Mamonov. The operation grew out of Mamonov's reggae/dub project Jahpapu, and its early catalog leaned heavily on hand-wired dub sirens and sound system gear before broadening into analog synthesizers and experimental effects.

The lab designs and builds its products in-house, mixing original circuits with occasional clones of classic designs. Notable instruments include the King Drone, an analog drone/ambient synthesizer, and the Dark Matter, a fully analog "chthonic" synth voice. On the pedal side, the Noise Rumble is a noise synth and glitch/fuzz box, while the Echo Rumble pairs that voice with an onboard delay.

The brand has a niche following among builders and players working in ambient, noise, dub, and experimental electronic music, and sells direct through its website as well as Reverb and Etsy.

Lefty’s Sound Lab has 1 product cataloged on Equipboard, including Synthesizers.