JLCooper Electronics is an El Segundo, California-based manufacturer of control surfaces, MIDI controllers, synchronizers, and automation hardware. Founded in 1979 by Jim Cooper — a former Chief Engineer at Oberheim Electronics and an early president of the MIDI Manufacturers Association — the company began by building accessories for the emerging synthesizer market and grew into a specialist in control and interfacing products for audio, broadcast, post-production, and other professional fields.

In the music and studio world, JLCooper is best known for fader-based MIDI automation controllers and compact control surfaces. Long-running product lines include the FaderMaster family (such as the FaderMaster Professional with 100mm long-throw faders for controlling sequencers, DAWs, hard disk recorders, and MIDI-controlled mixers and processors) and the ES-4/100 and ES-8/100 desktop automation controllers. The brand's catalog also extends to machine control, slow-motion and video switcher controllers, and OEM custom designs for broadcast and post facilities.

Manufacturing is done in the United States, and the company has positioned itself as a niche supplier rather than a mass-market one, with a reputation for durable, purpose-built hardware aimed at engineers and technical users who need tactile control over digital systems.

JL Cooper has 8 products cataloged on Equipboard, including MIDI Interfaces, Mixers, and DAW Controllers. Their gear is featured by 2 artists, with the strongest followings in Electronic, Pop, and Stage & Screen. Notable users include Hans Zimmer and Vince DiCola.