Kicker 48CWRT674 CompRT Series shallow-mount 6-3/4" subwoofer with dual 4-ohm voice coilsKicker 48CWRT674 CompRT Series shallow mount 6 3 4" subwoofer with dual 4 ohm voice coils Big sound from a small sub If you're looking for bass for a tight space, Kicker designed their CompRT subs with compact cars, pickup trucks, and ATVs in mind. The low profile 48CWRT674 6 3 4 subwoofer performs just like a full size sub, but without killing all your cargo space. This high performance CompRT sub is less than 3" deep, so your installation options