Rockville RSM65B 320W 6.5" Marine Speakers 4 Ohm, Waterproof, Shallow Mount, High Bass, Perfect for Boats and Outdoor Vehicles Black is up for auction in Electronics. The current bid is $3.50, 90% below the $35.00 MSRP, in New/Like New condition. This auction has ended — similar items appear in live auctions regularly.