4 Ohm Single Voice Coil. Efficiency (1w/1m): 83.6 dB. Optimum Sealed Box Volume: 1.00 Cubic Feet. Please feel free to send us a message if you have any questions about this item or other items for sale! Transit time could take longer during busy holiday seasons.This item is in the category "Consumer Electronics\Vehicle Electronics & GPS\Car Audio\Car Subwoofers". The seller is "designer_motorsports" and is located in this country: US. This item can be shipped to United States.