SeaKing Stores › Compact media receiver - PMX-1 Compact media receiver - PMX-1 £340.00 Compact media receiver - PMX-1. Marine source/control product for a boat audio system. Compact Digital Media Receiver; Bluetooth / USB / AUX / tuner. Add To Cart Added! Compact media receiver - PMX-1. Marine source/control product for a boat audio system. Compact Digital Media Receiver; Bluetooth / USB / AUX / tuner.