MB Quart PWM304 Subwoofer - PASMAG is the Tuner's Source for Modified Car Culture since 1999
MB Quart PVI210
MB Quart PWE 352 15" subwoofer with dual 2-ohm voice coils at Crutchfield
MB Quart DWI 302
Amazon.com: MB Quart DS1-204 Discus Shallow Mount Subwoofer (Black) – 8 Inch Subwoofer, 400 Watt, Car Audio, 2 Inch Voice Coils, UV Rubber Surround, Best in Sealed Enclosures : Electronics
Altavoces MB QUART QX 100 en Solocaraudio.
MB Quart RWC254 10 inch 250mm Subwoofer Boxed | eBay
Getue MB Quart RW-108A 600W Reference Series 8" Slim Low Profile Compact Under-Seat 4-Ohm Active Powered Subwoofer Enclosure with Built in Amplifier for Car Boat RV ATV : Amazon.es: Electrónica
MB Quart PWH304
MB QUART Woofer-Set 16,5 cm QS-165W : Amazon.es: Electrónica