BASB10-V4 Passive Underseat/Compact Enclosure. First of all, with its compact footprint and shallow height, this subwoofer is perfect for installations where space is limited, the enclosure has a compact design. The BASB10-V4 is a compact enclosure with premium design, the Powerbox 400.1 can be easily installed using our rapid fit kit, streamlining the installation process and making it quick and hassle free. Moreover, the SB10 is designed to seamlessly blend in with any vehicle, featuring a slim and compact profile. Attention to detail in the design ensures it complements the modern and premium look of todays vehicles. Some other important features include that the steel mesh grille provides a strong added layer of protection when installing it in accessible locations, the ARBSS Anti Resonance Bass Support System reduces unwanted vibration, this results in a cleaner sound and increased output. The compact enclosure also has a great and accurate bass response, the BASB10-V4 is designed to fit perfectly into the seat bases of transporter T5/T6 vans for a serious upgrade in bass output. Overall, the BASB10-V4 is a compact enclosure that is passive underseat/ compact it has great bass response and it is designed perfectly to fit under seat bases of vans. 134 x 337 x 337mm. VIBE 400.1 AMPLIFIER. 1.5? X 6.2? X 3.2? (37mm x 157mm x 82mm). Optional ISO connection kit. Frequency response: 10Hz – 500Hz. Crossover range: 30Hz – 150Hz Class D micro amplifie.