Kicker KS-Series 51KSC6504 6.5" Coaxial Speakers and 51KSC6904 6x9" Coaxial Speakers - High Power Handling, Polypropylene Woofer, Tough Rubber Surrounds Enhance your audio experience with our premium Kicker speaker package. This package includes 51KSC6504 6.5" and 51KSC6904 6x9" coaxial speakers, delivering unparalleled sound quality. Immerse yourself in exceptional sound quality and enjoy superior audio performance with this top-notch system. Kicker 51KSC6504 Coaxial Speakers: Condition: New Design: 2-Way Woofer: 6-1/2 inches (160 mm) Tweeter: 3/4 inch (20 mm) Impedance: 4 Ω Power (RMS): 15-100 Watts Sensitivity: 90 dB (1W, 1m) Frequency Response: 43-21,000 Hz Mounting Hole Diameter: 4-13/16 inches (123 mm) Top Mount Depth: 1-13/16 inches (46 mm) Bottom Mount Depth: 2-3/16 inches (54 mm) Tweeter Protrusion: 5/16 inch (8 mm) Grilles: Yes Tweeter Magnet Material: Neodymium Tweeter Dome Material: Silk Woofer Cone Material: Polypropylene Woofer Surround Material: Rubber Kicker 51KSC6904 Coaxial Speakers: Condition: New Design: 2-Way Woofer: 6 x 9 inches (160 x 230 mm) Tweeter: 1 inch (25 mm) Impedance: 4 Ω Power (RMS): 15-150 Watts Sensitivity: 92 dB (1W, 1m) Frequency Response: 30-21,000 Hz Mounting Hole Diameter: 5-11/16 x 8-7/16 inches (144 x 215 mm) Top Mount Depth: 2-15/16 inches (75 mm) Bottom Mount Depth: 3-3/16 inches (81 mm) Tweeter Protrusion: 1/16 inch (1 mm) Grilles: Yes Tweeter Magnet Material: Neodymium Tweeter Dome Material: Silk Woofer Cone Material: Polypropylene Woofer Surround Material: Rubber