KICKER® PS speakers are designed by bike riders and powersports enthusiasts. Designed specifically to sound good and last through every kind of weather, these drivers are the perfect solution for motorcycles, ATV’s. PS 4" 2Ω Coaxial These weatherproof speakers are made to deliver clean, crisp music, on the road and off – even through a helmet. Tough construction that stands up to the elements is combined with high-grade sound quality, without modifying your fairing or adding extra weight. Add a PXA amplifier for a complete system, meant for rough roads, and rougher trails.These PSM speakers work best with 30 watts of recommended power. See below for more details. Specifications: Woofer (in, mm) - 4, 100Tweeters (in, mm) - 3/4, 20Impedance (Ohms) - 2Recommended Amplifier Power (watts RMS) - 50Peak Power (watts, per ANSI/CTA-2031-A) - 100Sensitivity (dB 1w/1m) - 85.8Frequency Response (Hz) - 100 - 20kMounting Hole Diameter (in, mm) - 3-5/8, 93Mounting Depth (in, mm) - 1-11/16, 43Weight (oz, g) - 11.9, 338Grilles - Yes Have Questions About This Product? Message us here or: Email Us At: [email protected] Call Us At: 315-458-5000