Car Subwoofers
Focal IBus 20 20cm Under Seat Active Subwoofer, 8" Active Bass Tube
Active enclosure with 20cm (8”) subwoofer Max. power 150W Nom. power 75W
https://www.bizrate.co.uk/carsubwoofers/focal-ibus-20-20cm-under-oid5087025634.html