The APS 10 D is designed to provide maximum performance in a sealed enclosure with extremely compact volumes ranging from 10 lt. to 12 lt.

The dual voice coil and single coil versions feature connection plugs for easy wiring. The subwoofers in the Prima series have been developed with the primary goal of delivering high performance in tight spaces.

Output is a matter of excursion. The more air that moves in the cone, the more output. However, reduced mounting depth traditionally meant low excursion.

The subwoofers in the Prima series use a special container-basket geometry that guarantees high displacement of the moving mass while keeping the mounting depth to a minimum.

It has been carefully designed to avoid the phenomenon of "swaying." Additionally, the design of an air duct cooling system in the basket is considered innovative, eliminating the need for vents on the bottom plate.

This allows the subwoofer to be placed close to the rear wall of the enclosure, making the most of the reduced mounting depth.