Polk Audio 4X MM Series Ultra Marine Certified 6.5" 2 Way Coaxial Car/Boat Speakers PACKAGE INCLUDES: 4 x Polk Audio MM Series Ultra Marine Certified 6.5" 2 Way Coaxial Car / Boat Speakers SPEAKERS: MM 652 6-1/2" car speakers only improve on Polk's well-earned reputation. The titanium-coated 6-1/2" polymer woofer cone, backed by a space-efficient magnet, delivers the full sound you've been hungry for. SPEAKERS:A low-profile, lightweight carbon basket features excellent venting to keep these speakers cool when you're really pouring on the power. And your music's high frequencies will soar, thanks to delicate handling by the newly designed 1" Terylene fabric dome tweeter. SPEAKERS: Tuned for the total sonic accuracy you get in a studio monitor speaker, the MM1 Series reconfigures this high-quality sound for an on-the-go experience that's way beyond anything you'll hear in an OEM factory setup. 100% SATISFACTION GUARANTEE: Buy With Confidence With Our 30 Day Money Back Hassle Free Guarantee And A 1 Year Warranty