Audison APS 8 D subwoofer (200 mm).

Audison APS 8 D (PRIMA series) subwoofer 8" (200 mm).

The APS 8 D is designed to deliver maximum performance in a sealed enclosure with ultra-compact volumes from 7.5 lt. to 8.5 lt. 
It features push connectors for ease of wiring and configurations and has been developed with a primary goal: to deliver high output in tight spaces. 
Output is a matter of excursion; the more air the cone moves, the more output. However reduced mounting depth traditionally has meant low excursion. 
Prima subwoofers employ a special cone-dustcap-basket geometry which guarantees large excursion of the mobile group, while keeping the mounting depth to a minimum. 
The surround and spider have been carefully designed to prevent the “rocking-mode” phenomenon. 
The cooling circuit has been designed with air vents on the basket underneath the spider, eliminating the need for vents on the bottom-plate. 
This allows the subwoofer to be mounted close to the back wall of the enclosure, making the most of the reduced mounting depth.