Kicker PS 5.25 Coaxial Speakers These speakers are designed to last through any weather making them the last speakers you might ever own. Hear your music with clarity in any condition, even when you are wearing a helmet. Features Lightweight design featuring titanium tweeters and neodymium magnets Speakers work best with 50 watts of power Woofer size: 5-14 in., 133mm. Tweeter size: 3/4 in., 20mm. Impedance (ohms): 2 Max Rec Amp Power (watts Peak/Rms): 100/50 Sensitivity (dB 1w/1m): 88.3 Frequency response (Hz): 60-20k Mounting hole diameter: 4-7/8 in., 124 mm. Mounting depth: 2-3/16 in., 56 mm. Weight: 12.6 oz., 358 g. Grilles: Yes (H-D Bat-wing)