Audison Prima APBX 8 DS 8" Passive Sub Box Compact Subwoofer Enclosure 250w RMSPrima APBX 8 DS Subwoofer Box 500 W Peak Power 200 mm 4 + 4 ohm sub box Audison Prima Audison Prima was designed to meet the interest of the car model enthusiasts who like to appreciate all the nuances of the musical message with components that are perfectly integrated in the car OEM system, preserving the most precious Prima on Audison requirement of OEM integration: space. Ultra low profile (5. 16 in. 131 mm) box with sealed design perfectly tuned