MBS is a boutique effects pedal manufacturer based in Buenos Aires, Argentina, producing handmade guitar and bass stompboxes since 2008. The company builds a diverse lineup spanning drive, modulation, time-based, and utility pedals, all featuring true bypass switching and professional-grade components. Notable products include the Stonecutter high-gain distortion with an active three-band EQ and 25dB of mid cut/boost, the British Drive overdrive, and the HummingVerb — a 24-bit digital reverb offering Classic, Hall, and Shimmer modes.

MBS also produces several utility and creative tools aimed at working musicians. The Parallel Universe is a parallel mixer/blender that lets players blend their dry signal with effects placed in its loop, while the Evolution is an active volume pedal with a transparent buffer that doubles as a line driver. The Super Booster provides ±20dB of clean boost across three voicing modes (Flat, Bright, and Fat), and the Black Sheep Multi-Wah features a hybrid optical control system with six selectable wah sweep curves. Rounding out the range are the Mr. Smith tap-tempo delay (up to 1600ms), the Delilah digital delay, and the Multipower DNR pedalboard power supply with ten isolated outputs. Argentine rock band Babasónicos are among the notable acts to have used MBS pedals.

MBS has 9 products cataloged on Equipboard, including Overdrive Effects Pedals, Reverb Effects Pedals, and Effects Pedal Accessories. Their gear is featured by 7 artists, with the strongest followings in Rock, Metal, and Blues. Notable users include Hernan Terry Langer, Hernán Langer, and Davie504.