Alpha Recording System (ARS) is a Japanese audio equipment manufacturer based in Nakano-ku, Tokyo, specializing in hand-built rotary DJ mixers and related hi-fi components. The company designs and assembles its products in Japan using premium parts — ALPS potentiometers and switches, Sifam VU meters, and machined aluminum casework — aimed at DJs and listeners who prefer the workflow and tone of a rotary-style mixer over traditional fader-based designs.

The ARS catalog centers on a line of rotary mixers in various channel counts, including the two-channel Model 1100, the four-channel Model 9100 and Model 9500, and the six-channel flagship Model 9900, which features three-band isolator EQ on each channel and a master isolator section. The brand also produces tabletop units such as the Model 1000 and Model 9000, a 3x6 matrix mixer, as well as outboard crossovers, equalizers, speakers, and replacement parts sold through its direct shop.

Built to order with long lead times, ARS mixers have developed a reputation in the house, disco, and audiophile DJ communities as boutique alternatives to better-known rotary brands like Bozak, UREI, and E&S. The company operates its main site at ars-tokyo.co.jp and a direct storefront at ars-direct.jp.

Alpha Recording System has 7 products cataloged on Equipboard, including DJ Mixers. Their gear is featured by 3 artists, with the strongest followings in Electronic. Notable users include Floating Points, Fjaak, and "Little" Louie Vega.