Excessive external noise such as running engines or wind can nearly drown out standard VHF or radio transmissions. With its built-in amplifier, Shakespeare's ES-4P external speaker elevates audio level to a mighty 94 dBA, while improving tone and clarity.

This white, weatherproof 10 cm speaker not only amplifies VHF sound, but is compatible with i-Pods and most CD players, as well. Operating on 12V DC, this 4-ohm speaker features a tough, marine-grade Mylar cone. Volume and tone controls enable users to dial in the perfect sound, while a switchable attenuator helps prevent accidental over-driving. With the push of a button, the versatile ES-4P can also be used as a standard external speaker with 8 watts of audio power.

Performance matched to VHF radio external audio outputs, this high-quality Shakespeare speaker is easy to install. A swivel mounting bracket, hardware mounting kit and 1.8 m of cable with a mini phone plug are included.