Amazon.com: MB Quart RW-110A 800W Reference Series 10" Slim Low Profile Compact Under-Seat 4-Ohm Active Powered Subwoofer Enclosure with Built in Amplifier for Car RV ATV : Everything Else
MB Quart RW1-254 Reference Series 10" subwoofer with dual 4-ohm voice coils at Crutchfield