Fostex is a Japanese audio equipment manufacturer founded in 1973 as a brand under Foster Electric Company, Ltd., which itself was established in 1949. Fostex specializes in producing a wide range of audio products, including loudspeakers, studio monitors, headphones, microphones, and multitrack recording equipment.

In the late 1970s, Fostex gained prominence by developing speakers for professional use, becoming well-known in both consumer hi-fi and professional audio fields. The company introduced the Fostex 6301B, a compact powered monitor speaker popular in broadcast and professional settings. Throughout the 1980s, Fostex was instrumental in making multitrack recording more accessible. They introduced the A-8, the first eight-track recorder utilizing affordable ¼-inch tape, which became a popular choice among home recording enthusiasts. Additionally, the Fostex 250 cassette multitracker offered four-track recording on standard cassettes running at double speed, improving high-frequency response and dynamic range. In the 1990s, Fostex transitioned to digital recording technology with products like the DMT-8, an eight-track digital hard disk recorder introduced in 1995. This device provided 16-bit, 44.1kHz audio recording with non-destructive editing capabilities, marking a significant advancement in affordable digital recording.

Today, Fostex continues to innovate, offering products such as high-end headphones (e.g., the TH-series), digital audio converters (e.g., the HP series), and devices for portable listening. Their T50RP headphones have become particularly popular in headphone modification communities. The company remains a respected name in both professional and consumer audio markets, known for its commitment to quality and innovation.

Fostex has 101 products cataloged on Equipboard, including Active & Passive Monitors, Analog, and Headphones & In-Ear Monitors. Their gear is featured by 83 artists, with the strongest followings in Rock, Electronic, and Pop. Notable users include Mac DeMarco, A.R. Rahman, and Bill Nelson. Fostex's catalog spans the full price spectrum — from entry-level options to high-end flagships.