ESB 1.10SD4 Sub 10 Inch Car Subwoofer Mille Series 250w RMS 4 + 4 Ohm Pair1. 10SD4 10" 250 mm 4+4 Ohm Shallow Subwoofer More bass with less space! The ESB 1. 10SD subwoofers has been designed to achieve exceptional performance in an ultra compact design that fits any application. Thanks to a cutting edge design combined with engineering innovations that allow for an ultra slim profile, ESB delivers the best bass without compromising performance and quality. The unique motor structure, combined with a powerful 40. 5 Oz