Fostex, established in 1973 as a division of Foster Electric Co., Ltd., is a renowned Japanese audio equipment manufacturer specializing in high-quality speaker components, headphones, and professional audio gear. Leveraging its parent company's extensive experience since 1949 in OEM speaker and transducer products, Fostex has built a reputation for innovation and excellence in the audio industry.

    The company initially gained acclaim for developing Regular Phase (RP) technology, which delivers clear sound with high sensitivity and a wide dynamic range. This technology has been successfully applied to speakers, microphones, and headphones, notably in the T20RP studio monitoring headphones.

    Fostex's product lineup includes professional-grade speaker components, studio monitors, multitrack recorders, and high-fidelity headphones. The brand is well-regarded among audio professionals and enthusiasts for its commitment to delivering reliable and high-performance audio solutions.