RM110D4B - Rockford Fosgate 10 200W RMS Dual 4-Ohm Prime M1 Series Marine Subwoofer. Prime M1 10 Marine Grade Dual 4-Ohm. You will be issued a Return Authorization Number.In order to maintain an inventory of 100%, Brand New, A-Stock, untouched products, all sales are final. We ask that you please be sure you are ordering the correct product. The item "ROCKFORD FOSGATE RM110D4B 10 BLACK SUB DUAL 4-OHM MARINE BOAT SUBWOOFER SPEAKER" is in sale since Wednesday, May 27, 2015. This item is in the category "Consumer Electronics\Vehicle Electronics & GPS\Car Audio\Car Subwoofers". The seller is "woofersetc_outlet" and is located in Los Angeles, California. This item can be shipped worldwide.