MB Quart RSH304 - 12" 30cm 800 Watts 4 Ohm Shallow Mount Car Sub SubwooferMB Quart RSH304 12" 30cm 800 Watts 4 Ohm Shallow Mount Car Sub Subwoofer MB QUART proudly releases the newly developed MB QUART proudly releases the newly developed RSH shallow mount subwoofers with their ultra slim RSH shallow mount subwoofers. With their ultra slim design, solid, fibreglass reinforced composite baskets design, solid, fibreglass reinforced composite baskets and a powerful neodymium magnet system mounted and a powerful neodymium