6.5-inch Coaxial Marine Speakers 50W RMS power handling 1-inch (25 mm) silk dome tweeter Includes White & Gray Metallic Sport Grilles Includes White & Metallic Gray Sport Grilles Salt & Sun Certified 50W RMS power handling, perfect for use with Clarion Marine amplifiers Bridge-mounted, 1-inch (25 mm), edge-driven, silk dome tweeter with neodymium magnet and ferrofluid cooling Standard cutout size and mounting hole for easy retrofitting *****Continuous Power Handling (RMS) 50 W Recommended Amplifier Power (RMS) 30 - 100 W / Ch. System Efficiency 87 dB @ 1 W / 1 m System Nominal Impedance 4 O System Frequency Response 55 Hz - 20 KHz ± 3 dB *****Frame Outer Diameter 6.90 in / 175 mm Bolt Hole Circle Diameter 6.14 in / 156 mm Frontal Grille Protrusion* 1.36 in / 35 mm Mounting Hole Diameter 5.00 - 5.25 in / 127 - 133 mm Mounting Depth 2.83 in / 72 mm *Frontal grille protrusion measured from mounting surface