About the Alpine S2-S50 It's time for high-res We're big fans of Alpine's push to give more drivers access to high-res audio in the car. Using technology developed for their flagship F#1 Status Series, Alpine's Next Generation S-Series car speakers provide access to all the wonderous detail of your favorite high-resolution audio files at an appealing price. We recommend aftermarket power to drive these speakers, but even with factory power, their ultra-wide frequency response ensures a detailed, authentic sound. Innovative materials Alpine packs supreme capability into these speakers by using highly effective materials and proprietary design elements. The lightweight woofer cone, crafted from polypropylene, glass fiber, and mica materials, serves up the essential high output/low distortion sound required for high-res performance. The woofer's High Amplitude Multi-Roll (HAMR) surround brings out the best in bass by allowing maximum cone movement. A 3/4" cloth dome tweeter serves up all the high-frequency detail you've been missing with your factory speakers. Grilles are not included; the factory grilles should be suitable for most applications. Optional grilles are available for custom installations. Product highlights: 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 warranty: 1 year MFR # S2-S50 Item # 500S2S50 California customers: Please click here for your Proposition 65 WARNING. What's in the box: If you need assistance accessing this owner's manual, please give us a call. 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 Features & specs 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 or Length (inches) 4 1/2 Mounting Height (Inches) 0.64 Frame Width 5.09 Frame Length 5.09 The Alpine S2-S50 replaces these items: Alpine S-S50 Features No Grilles: No grilles are included with these speakers. The Alpine KTE-S50G grilles are availible if needed (sold separately).