Memphis PRX6903 6" x 9" 60W RMS 3-Way Coaxial Speakers 15-PRX693 - Memphis 6" x 9" 60W RMS 3-Way Coaxial Speakers RMS / Peak: 60W / 120W Polypropylene Cone. Sensitive enough to sound great, even with a factory car audio system. Polyurethane Surround. Durable and lightweight for high-efficiency and quick response. Mounting Depth: 3"