Korby Audio Technologies is a boutique American microphone manufacturer founded by Tracy Korby, who spent years repairing and modifying vintage microphones for engineers and producers before launching the company. The brand is best known for its hand-built, hand-tuned condenser microphones aimed at delivering the character of revered vintage studio mics in a modern, modular package.

The flagship Korby Convertible Tube Microphone System (the KAT series) uses interchangeable capsules designed to evoke the tonal personalities of classic models like the Neumann U47 and U67, Telefunken ELA M 251, AKG C12, and Sony C800G, allowing a single mic body to cover a range of vintage flavors. Korby also produces the KAT FET, a solid-state, fixed-capsule sibling that carries the same boutique, hand-tuned approach in a non-tube format.

The lineup is geared toward professional recording studios and engineers chasing classic large-diaphragm condenser tones for vocals, acoustic instruments, and room work, and the mics have been reviewed favorably in publications such as Tape Op and Sound on Sound.

Korby has 2 products cataloged on Equipboard, including Condenser Microphones. Their gear is featured by 5 artists, with the strongest followings in Hip Hop, Rock, and Electronic. Notable users include Serj Tankian, Dave Gahan, and Tech N9ne.