15" Magnus Series Subwoofer – Empire Car Audio Inc
Epik Empire Subwoofer dual 15's For Sale - US Audio Mart
Empire Car Audio - Five Star Champion Series by Empire 12″ Subwoofer Model CS – 1216 12” Subwoofer 4 ohm 3” High Quality Japanese High Temperature Aluminum Voice Coil 800 Watt RMS
Empire Sentinal-D 10 Inch Subwoofer With Amp for Sale in Chesterland, OH - OfferUp
Buying a 12" Kenwood Subwoofer Off Offer Up - Does it Work? - YouTube