System, built into a solid aluminum enclosure, is equipped with a large 28 cm (11 “) woofer and fits in almost any spare wheel well or even in the rim (from 15″) of the spare wheel. Thanks to a large and powerful magnetic drive, the integrated one is convincing 28 cm special woofer with rich and dynamic bass. 28 cm (11″) Subwoofer System Suitable for Spare Wheel Recess and Rims (15″+). 150 W/RMS, 300 W/MAX, 2+2? Subwoofer with black Stainless Steel Cone. Voice Coil 64 mm on Aluminum Former. 1.7 kg Magnet Motor with Ø 156 mm. Dimensions: Ø 360 x 145 mm.