Hertz Mille Pro 10 Inch Slim SubwooferHertz Mille Pro 10 Inch Slim Subwoofer Mille PRO shallow subwoofers have been designed to achieve exceptional performance even when there is very little space available to install the subwoofer box. MPS 250 S4 is optimized to work in ultra compact sealed boxesstarting from only 14 Lt (0. 49 Cf). A typical example is a subwoofer enclosure under the rear bench of pickup trucks, where the space and the height are limited. Mille PRO subwoofer have a depth