MLC is a boutique guitar amplifier and pedal manufacturer based in Gdańsk, Poland, founded in 2002 by Marek Laskowski. The brand name originates from "Mark L Custom," and the company hand-builds tube amplifiers, speaker cabinets, effect pedals, and MIDI-based guitar signal systems.

The amplifier line is built around the S_Zero series, including the S_Zero 100 and S_Zero 93, along with 2x12 and 4x12 cabinets loaded with speakers such as WGS Retro 30s. Signature models have been developed in collaboration with extreme-metal guitarists, including the Subzero V for Vogg of Decapitated and the Silenoz/S_Zero 93 for Silenoz of Dimmu Borgir. On the pedal side, MLC produces overdrives, fuzzes, and tube-driven boost designs, with offerings such as the Brown Sugar dynamic overdrive (featuring a four-position clipping mode) and the Elevation Fuzz.

The brand holds a niche reputation within European metal circles as a small-batch, custom-oriented builder, and its S_Zero amplifier platform has also been adapted into software form through a partnership with Bogren Digital, which distributes MLC-branded amp simulation plugins.

MLC has 5 products cataloged on Equipboard, including Guitar Amplifier Heads and Overdrive Effects Pedals. Their gear is featured by 8 artists, with the strongest followings in Rock, Metal, and Blues. Notable users include Wacław Kiełtyka, John Petrucci, and Steve Vai.