The John Hardy Company is a small American pro audio manufacturer based in Evanston, Illinois, founded and run by John Hardy. The company specializes in high-end microphone preamplifiers built around transformer-coupled, discrete solid-state signal paths, and is known for the transparent, detailed sound favored by recording engineers working in classical, jazz, acoustic, and orchestral contexts.

Its flagship product is the M-1 microphone preamplifier, introduced in 1987, which uses a Jensen input transformer, a custom output transformer, and the 990C discrete op-amp originally developed by Deane Jensen. The closely related M-2, introduced in 1996, offers the same circuit with a stepped 16-position gain switch for repeatable settings. Both are housed in a 1U rack chassis configurable with one to four channels. The company also produces the Jensen Twin Servo 990 preamp — a dual-stage 990 design originally contracted by Jensen — along with replacement mic preamp cards for third-party consoles (MPC-500C, MPC-600, MPC-3000) and standalone 990-series discrete op-amp modules.

Units are built to order from Hardy's home workshop rather than mass-produced, and the preamps have a long-standing reputation in tracking and mastering rooms for low distortion, wide bandwidth, and a clean, uncolored character.

John Hardy has 2 products cataloged on Equipboard, including Preamps. Their gear is featured by 4 artists, with the strongest followings in Rock, Metal, and Pop. Notable users include Steve Albini, Michael Stipe, and Josh Hoffman.