Everything you want in a reliable marine speaker.
The MA5500 has slim-line design, state-of-the-art sound, ultra-low magnetic interference, and it fits in the cutout of your old MA505 styrofoam speakers. It's everything you want in a reliable marine speaker: waterproof, corrosion-proof, flush-mounted, and you don't have to struggle to mount it 5" from the compass as you would another system because its magnets are shielded. UV-stabilized plastic case. In pairs.