Union Audio is a boutique analogue audio manufacturer based in Cornwall, United Kingdom, founded in 2014 by Andy Rigby-Jones. Before launching the company, Rigby-Jones spent years at Allen & Heath, where he played a key role in developing the Xone series of DJ mixers, including the Xone:92 and the rare Xone:V6, and later co-designed the MODEL 1 with Richie Hawtin's PlayDifferently. Union Audio initially operated as a design and manufacturing partner, producing hardware for brands such as PlayDifferently, MasterSounds and TPI before releasing products under its own name.

The company's own-brand debut came in 2022 with the orbit.6, a six-channel rack-mounted analogue rotary mixer with a fully discrete signal path. This was followed by the elara.4 and elara.6, the two.valve and four.valve rotary mixers that add per-channel valve stages, and the more accessibly priced Orbit LE range (orbit.2 LE, orbit.4 LE, and FX variants). A standalone LE fx effects unit rounds out the catalog. All products are hand-built at the company's Cornwall facility and aimed at club installations, audiophile DJs and vinyl-focused players.

Union Audio is recognised within the rotary-mixer niche for its discrete analogue signal paths, valve-stage designs and close ties to the broader boutique DJ-mixer scene that also includes brands like MasterSounds and Condesa.

Union Audio has 19 products cataloged on Equipboard, including DJ Mixers, Home Headphone Amps & DACs, and Home Amplifiers.