Audio Research Corporation, commonly known as Audio Research, is an American company that specializes in manufacturing high-end audio equipment. The company was founded in 1970 by William Zane Johnson, and it has since become renowned for its vacuum tube- based audio components, particularly preamplifiers and power amplifiers.

Audio Research has a strong reputation in the audiophile community for its commitment to craftsmanship, attention to detail, and dedication to producing audio equipment that delivers exceptional sound quality and musicality. They are known for using high-quality components, including vacuum tubes, to achieve their signature warm and natural sound characteristics.

Some of Audio Research’s iconic products include their classic SP series of preamplifiers, the Reference series amplifiers, and various other tube-based and solid-state offerings. The

company also produces other audio components such as digital-to-analog converters (DACs), phonostages, and integrated amplifiers.

Their products are often favored by audiophiles who value the sonic characteristics and musicality that vacuum tubes can provide, along with the build quality and design aesthetics that Audio Research products offer.