Fusion MS-EL602 6" 150 Watt Shallow-Mount Speaker 6" 2-Way Speakers, (Pair) Mounting Diameter 5 1/8", Mounting Depth 1 5/8" 150 Watts Maximum Power, 4 ohm impedance 85db Efficiency (1W/1M) Frequency Response 60-22kHz UV Stable, Salt,Fog, Water Resistant ASTM-D4329/ASTM-B117 Compliant