J&M speakers are the most powerful speakers you can buy for your bike and they perform extremely well when used with a medium-high powered accessory amplifier. Speakers feature lightweight waterproof woven-fiber cones with super-rigid metal basket and a high-density lite-weight Neodymium magnet structure, specially coated to maintain flux-strength integrity even at extreme operating temperatures.; 2 ohms impedance 300 watts maximum input (200w RMS - 91db sensitivity) Lightweight waterproof one-piece woven-fiber driver cone with super-rigid metal basket design High efficiency vented voice coils for improved cooling when operating at high volumes for extended periods Custom speaker grills with high-output tweeters 100% plug-n-play Can be painted to match the color of your Bagger Speakers perform extremely well when used with a medium to high-powered accessory amplifier