AML (Audio Maintenance Limited) is a UK-based pro audio company known for hand-assembled 500 series modules and for supplying hard-to-find parts, transformers, and repair services to the broadcast, music recording, and post-production industries. The company's product line grew out of its component and repair business, with early designs — including the ez1073-500, a Neve 1073-style mic pre/EQ — originating from discussions on the GroupDIY forum before being released as finished products.

The AML 500 series range includes modules such as the ez1073-500 (Class A mic preamp and EQ), the ez1081 preamp/EQ (modeled on the Neve 1081), the 5003D mic preamp built around Carnhill input and output transformers, and the ez1058-500 germanium equalizer. Modules are assembled and tested in England and typically use transformer-balanced signal paths and Class A circuitry inspired by classic British console designs.

Beyond its own modules, AML also manufactures upgrade kits and replacement parts for vintage and professional consoles including TAC Scorpion and AMEK desks, and is an authorised after-sales provider for Penny & Giles faders. The brand is favoured by project and commercial studios seeking affordable alternatives to vintage Neve-style outboard.

AML has 7 products cataloged on Equipboard, including Effects Processors and Preamps. Their gear is featured by 4 artists, with the strongest followings in Rock, Electronic, and Pop. Notable users include Clay Parton, Jay Watson, and Colt Capperrune.