Kicker 4 Inch PS-Series Powersports Speakers 40PS44 bundleKicker 4 Inch PS-Series Powersports Speakers 40PS44New for 2014; high-performance, high-efficiency coaxial systems designed as a weatherproof, drop-in replacement for motorcycle fairings, marine, ATVs, UTVs, etc.; clearest audio reproduction through a helmet at highway speeds; utilizes sophisticated, lightweight neodymium magnet structure for high output, low weight and superb sound (compared to competitive speakers with lesser output, clarity and poor bike handling); durable, lightweight polypropylene cone attached to specially designed inverted surround for max excursion in small space; 20mm, neo-titanium domed tweeters are bridge-mounted to withstand extreme vibrationSpeaker Size 4" Design 2-way Tweeter Design Dome Tweeter Size 3/4" Tweeter Composition Titanium Woofer Composition Polypropylene Woofer Surround Rubber Peak Power Handling 60 watts RMS Power Handling 30 watts Sensitivity 85.8 dB Frequency Response 100 - 20000 Hz Impedance (Per Voice Coil) 4 ohms Top-Mount Depth 1-11/16" Cutout Dimensions 3-5/8" Speaker Grilles Yes