When it comes to waterproof audio components for Harley-Davidson Motorcycles, Aquatic AV takes the cake. These Aquatic AV 6.5" full-range, 2-way waterproof Speakers with 1" adjustable tweeters deliver improved sound quality when traveling at highway speeds. Flush mount grills and hardware are included along with mounting rings.; Technical Specs: Full-range, 2-way waterproof speaker 6.5" Cone 1"/ 25mm Tweeter Power (Max): 360W (2x 180W) Power (RMS): 180W (2x 90W) 4 Ohm 60Hz - 20,000Hz 12dB/Octave Cross-Over Sensitivity: 87dB 14.3oz Neodymium Magnet Aluminum basket 144mm Mounting hole diameter 69.2mm Mounting Depth Grill Material: UV Plastic, 500hrs stable 167mm Outside grill diameter