Kicker KS-Series 51KSC4604 4x6" Coaxial Speakers and 51KSC6504 6.5" Coaxial Speakers - High Power Handling, Polypropylene Woofer, Tough Rubber Surrounds Upgrade your car audio with our premium Kicker speaker package! Featuring 51KSC4604 4x6" and 51KSC6504 6.5" coaxial speakers, this system delivers unparalleled sound quality for an immersive listening experience. Elevate your driving journey with superior audio performance. Kicker 51KSC4604 Coaxial Speakers: Condition: New] Design: 2-Way Woofer: 4x6 inches (100x160 mm) Tweeter: 1/2 inch (13 mm) Rated Impedance: 4 ohms Recommended Amplifier Power: 15-75 Watts RMS Sensitivity: 88 dB (1W, 1m) Frequency Response: 50-20,000 Hz Mounting Hole Diameter: 4x5-5/16 inches (101x151 mm) Top Mount Depth: 1-11/16 inches (44 mm) Bottom Mount Depth: 2 inches (51 mm) Tweeter Protrusion: 1/16 inch (2 mm) Grilles: No Tweeter Magnet Material: Neodymium Tweeter Dome Material: Silk Woofer Cone Material: Polypropylene Woofer Surround Material: Rubber Kicker 51KSC6504 Coaxial Speakers: Condition: New Design: 2-Way Woofer: 6-1/2 inches (160 mm) Tweeter: 3/4 inch (20 mm) Rated Impedance: 4 ohms Recommended Amplifier Power: 15-100 Watts RMS 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