JDK Audio is a line of recording equipment developed and engineered by API (Automated Processes, Inc.), the Maryland-based console and outboard maker founded in the late 1960s. The brand launched as Arsenal Audio and was renamed to JDK following a trademark dispute with JVC over the "Arsenal" name. The range was conceived as a more accessible entry point into API-designed circuitry, aimed at project studios and engineers who wanted the company's sonic character without the cost of a full API console or 500-series lunchbox build-out.

The product catalog centers on rack and 500-series preamps, compressors, and equalizers. Rack-mount offerings include the R20 dual-channel microphone preamp, the R22 dual-channel compressor, and the R24 four-band equalizer, along with the 8MX2 eight-channel mic preamp and summing mixer. The 500-series lineup includes the V10 single-channel mic preamp, the V12 compressor, and the V14 four-band EQ. The R22 and V12 compressors are built around a circuit derived from the original ATI Paragon console design and include API's patented THRUST switch, which shapes how the detector responds to low-frequency content to keep high frequencies intact under heavy compression.

Because JDK Audio shares design DNA and manufacturing with API, the units are often discussed alongside API's own 512, 525, and 550-series modules in studio and review coverage. The line has been carried by pro audio retailers such as Sweetwater, Full Compass, and Soundpure, and is typically positioned as a tracking-and-mixing toolkit for users already working in an API-style workflow.

JDK Audio has 7 products cataloged on Equipboard, including Preamps, Effects Processors, and Mixers. Their gear is featured by 2 artists, with the strongest followings in Electronic. Notable users include Röyksopp and Kaskade.