Kicker KS-Serie 51KSS6904 6x9" Component Speakers and 51KSC6504 6.5" Coaxial Speakers - High Power Handling, Polypropylene Woofer, Tough Rubber Surrounds Enhance your audio experience with our premium Kicker speaker package. This package includes 51KSS6904 6x9" component speakers and 51KSC6504 6.5" coaxial speakers, delivering unparalleled sound quality. Immerse yourself in exceptional sound quality and enjoy superior audio performance with this top-notch system. Upgrade your car's sound system and indulge in an immersive listening experience. Kicker 51KSS6904 Component Speakers: Condition: New Woofer: 6x9 inches (160x230 mm) Tweeter: 1 inch (25 mm) Rated Impedance: 4 ohms Amplifier Power: 15-150 Watts RMS Sensitivity: 92 dB (1W, 1m) Frequency Response: 35 Hz - 21 kHz Woofer Mounting Hole Diameter: 5-5/8x8-7/16 inches (143x215 mm) Woofer Top Mount Depth: 2-15/16 inches (75 mm) Woofer Bottom Mount Depth: 3-3/16 inches (81 mm) Flush Mount Tweeter Hole Diameter: 1-3/4 inches (45 mm) Flush Mount Tweeter Depth: 11/16 inches (17 mm) High Pass Filter: 12 dB at 4,000 Hz Low Pass Filter: None High-Frequency Output Attenuation: 0, 4.5, 9 dB Kicker 51KSC6504 Coaxial Speakers: Condition: New Speaker Design: 2-Way Woofer: 6-1/2 inches (160 mm) Tweeter: 3/4 inch (20 mm), Neodymium magnet Rated Impedance: 4 Ω Recommended Amplifier Power: 15-100 Watts RMS Sensitivity: 90 dB (1W, 1m) Frequency Response: 43 Hz - 21k 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)