64 Audio is a Vancouver, Washington-based manufacturer of custom and universal-fit in-ear monitors for musicians, audio engineers, and audiophiles. The company was founded in 2010 by sound engineer Vitaliy Belonozhko under the name 1964 Ears, and rebranded to 64 Audio as its product line expanded beyond stage monitoring into the high-end consumer and pro audio markets.

The brand is known for several proprietary technologies, including apex (Air Pressure Exchange), a vented module system designed to relieve the pneumatic pressure typically associated with sealed IEMs, and tia (tubeless in-ear audio), an open balanced-armature design that removes the sound tubes between drivers and the nozzle. Its lineup spans flagship models such as the U18s, U12t, Nio, Volür, Duo, and the Trió, along with custom-fit versions of the same monitors and accessories like the Wave universal cables and LID linear impedance design adapter.

64 Audio's monitors are widely used on tour and in studios, and the company has supplied IEMs to a broad roster of touring artists across rock, pop, hip-hop, and country. The brand is also active in the audiophile community, where its tia-equipped models are frequently discussed alongside other premium IEM makers.

64 Audio has 9 products cataloged on Equipboard, including Headphones & In-Ear Monitors and Active & Passive Monitors. Their gear is featured by 16 artists, with the strongest followings in Rock, Metal, and Electronic. Notable users include Ryan "Fluff" Bruce, Lauren Babic, and Jason Richardson.