Garmin (GRMN) launched the JL Audio MediaMaster (MM) 55 and 55-HR next-generation marine and powersports source units.The MM55 features a 2.8-inch full-color LCD display with larger icons, simplified menus and a refreshed color palette, while the MM55-HR is a versatile helm device that can be mounted in various areas around a boat or vehicle, enhancing its efficiency.These devices also offer connectivity options like digital AM/FM tuner, DAB+ radio, Bluetooth, analog AUX input and USB connection. With advan ...