Kicker PS Coaxial Speaker 2ohm 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: 2 ohm voice coil Recommended power: 90 watts Peak power: 180 watts High efficiency titanium tweeter Perfect fairing drop-ins Woofer size: 6x9 in., 150x230 mm. Tweeters: 1 in., 25 mm. Impedance: 2 ohms Max rec amp power (watts Peak/Rms): 180/90 Sensitivity (dB 1w/1m): 87.3 Frequency response: 40-20k Hz Mounting hole diameter: 5/8 x 8-7/16, 143 x 214 Mounting depth: 3-1/4 in., 83 mm. Weight 43.5 oz., 1233 g. Grilles: Yes