Swart Amplifier Co. is a boutique guitar amplifier builder based in Wilmington, North Carolina, founded by Michael Swart alongside Kelly Holsten. Swart, a musician and recording engineer, began hand-building point-to-point, tube-driven amps out of his studio after struggling to find a small amp that could deliver the tone and feel of vintage low-wattage combos — a search that produced the original Space Tone.

The lineup centers on hand-wired tube combos and heads that lean on classic American circuits with modern refinements. Core models include the Space Tone 6V6se (ST-6V6se), the Atomic Space Tone (AST) and its variants (AST Pro, AST Master Combo, AST Head Mk II), the Space Tone Atomic Jr, the STR-Tweed and STR-Tremolo, the MOD-84, the Antares, the Super Space Tone 30 (SST-30), and the 45-watt ST-45. The company also makes the Atomic Boost pedal and stereo configurations such as the ST-Stereo and Stereo Master 20.

Swart amps have built a following among players drawn to low-wattage, studio-friendly tube tone with vintage-flavored reverb and tremolo. Artists associated with the brand include Jeff Tweedy of Wilco, Dean Wareham (Luna, Galaxie 500), and Steve Earle and members of his band The Dukes, including Chris Masterson and Buddy Miller.

Swart has 31 products cataloged on Equipboard, including Combo Guitar Amplifiers, Guitar Amplifier Heads, and Guitar Amplifier Stacks. Their gear is featured by 9 artists, with the strongest followings in Rock, Folk, World, & Country, and Electronic. Notable users include James Iha, Trey Anastasio, and Paul Leary. Most Swart products sit firmly in the high-end, boutique range.