Data file created by the SPL Tracer, a speaker frequency response and impedance graph tracer application; contains speaker data, such as impedance level units and phase information necessary for drivers; similar to .FRD files.

ZMA files are used by Speaker Workshop, which enables users to design and test loudspeakers on Windows 95, 98, XP, and 2000 versions. To import the ZMA file into Speaker Workshop select Resource → Import... or right-click the "Project Tree" and select Import..., navigate to your ZMA file, and click Open. NOTE: The SPL Tracer and Audua Speaker Workshop programs are no longer available.