Fits:  Polk Audio DB651 6.5"/6.75" 2-Way Marine Certified db Series Speakers with Liquid Cooled Silk Tweeters
6-1/2" / 6-3/4" 2-way Coaxial Speakers (Marine Certified)
Power Handling: Peak: 360 watts per pair / RMS: 120 watts per pair
Lightweight dynamic balance polymer/mica composite mineral filled cone woofer
3/4" Liquid-Cooled Silk/Polymer composite Dome Tweeter
High Pass and Low Pass Crossover Filters / Low-mass 2-Layer 25mm Kapton Voice Coil former