Whether you're out on the water or at the dock, the Nautica TS-MR1640 6-1/2" 2-way speaker adds a new dimension to your boat. It's built specifically for marine use, with heavy-duty construction inside and out that strenuously resists water, corrosion, heat, and sunlight. The 1-1/8" Poly-Ether Imide Dome Tweeter with Magnetic Fluid and Equalizer delivers rich, smooth highs, and the Conex Damper delivers higher power handling and deeper bass. The tinsel lead wire and terminals are gold-plated for extra protection.