4) New NK2-116W 6.5" 120W 2-Way Coaxial Marine & Power Sports Speakers NK2-116W Impedance: 4 Ohm Sensitivity: 86dB Frequency Response: 65-25000Hz 100 Watt Max (200 Watt per 4 Speakers) Polypropylene woofer cone, Butyl rubber surround, and a Titanium coated tweeter