Roswell Marine R1 7.7 Marine Speakers The R1 7.7 marine speaker offers clarity and Roswells signature sound. The included Deutsch wiring harness allows for a watertight connection. An integrated RGB LED backlights the speaker to create your desired visuals. Klippel tested and certified to guarantee acoustic performance. Coaxially mounted, the 1 silk dome tweeter sits on a 7.7 woofer for an innovative sound. A locking trim ring conceals all mounting hardware to allow for a clean looking install.