Sony ESPRIT APM-8
circa 1982

Unreleased prototype of an updated and diffraction-less APM-8.
The horizontal curvature is somewhat equivalent to that of the ESPRIT APM-6 Monitor (1982) while the rounded top wil be incorporated into the ESPRIT APM-4 (1983) albeit in a much slimmed-down manner. The bass driver's metal frame is also enlarged and curved to fit the new shape.

This image was found in a british 1985 ES catalog and sent by Amardeep, earliest TVK supporter.