Alpine S2-S50 Next-Generation S-Series 5-1/4" 2-way car speakers

Product info: 5-1/4" 2-way speakers polypropylene/glass fiber/mica woofer cone with specialized rubber surround 3/4" cloth dome tweeter handles up to 55 watts RMS (170 watts peak power) frequency response: 65-40,000 Hz sensitivity: 87 dB impedance: 4 ohms mounting depth: 1.969" grilles not included (Alpine KTE-S50G grilles sold separately) Hi-Res Audio Certified Alpine S2-S50 owner's manual Two 2-way speakers Two 12" Lengths of speaker wire (each has quick-slides on one end and bare wire on the other) Eight 3/4" Screws 8 Flat washers 8 Speed clips Warranty information On-line product registration information Important Notice sheet Declaration of conformity Template and specs on box General Speaker Size 5 1/4 Driver Design 2-way Woofer Design Cone Woofer Material Polypropylene/Glass Fiber/Mica Woofer Surround Rubber Midrange Design --- Midrange Material --- Tweeter Design Dome Tweeter Material Cloth Super Tweeter Design --- Super Tweeter Material --- Impedance (Ohms) 4 Weather-resistant No Grilles Included No Parts Warranty 1 Year Labor Warranty 1 Year Specifications Sensitivity (1W at 1 meter) 87 Sensitivity at 2.83 volts N/A Frequency Response 65 - 40k Hz Maximum RMS Wattage 55 Peak Power Handling (Watts) 170 Top-mount Depth (Inches) 2 Bottom-mount Depth (Inches) N/A Cutout Diameter (Inches) 4.478 Mounting Height (Inches) 0.64 Frame Width 5.09 Frame Length 5.09