Roswell Marine RMA 12 Subwoofer Roswells RMA 12 subwoofers feature a versatile design that bring the party to life and are well suited for both sealed or ported enclosures. Featuring an excellent low-end extension these subs can handle 500 watts RMS. Utilizing marine grade plastic housings along with the machined wire terminals, these subs are saltwater and UV resistant for a long working life. The integrated impedance switch allows you to select between series or parallel voice coil. Klippel te