Thursday 22 March 2012

Best Marine Speakers Take Your Music With You Onto The Water

By Petra Berg


Maritime environments create tough conditions detrimental to the workings and durability of music (audio) sound systems. Sound equipment for boats is specially designed to address these challenges. Particular attention is given to corrosion, dampness, sunlight and motion. These issues and their solutions can be highly technical making the selection of the best marine speakers for a vessel a difficult decision.

Once a sound system is selected, its positioning on a vessel must be planned with some care. For example, they need to be positioned so that their magnetic field does not distort the ship compass and other navigational equipment. Bulky subwoofers can be positioned out of the way under settees. Being smaller, tweeters and midbass speakers can be recessed in side or ceiling panels. Amplifiers can be placed in a salon cabinet or engine compartment.

One important and cautionary point is that sound equipment designed for cars or homes is not suitable for a harsh nautical environment like that on a boat. These systems are not suitable for maritime environments. In addition to corrosion (salt, moisture), damage from sunlight and disturbance from motion, a boat sound system must also be designed to handle the noise made by the vessel moving through the water as well as the noise made by the engines. This noise issue is usually addressed by including a good amplifier as part of the system.

Another deficiency of land-based audio systems is that they typically have paper cones that are not water resistant. By contrast, nautical systems usually incorporate a cone made from polypropylene. This plastic effectively resists moisture. Additionally, nautical audio systems typically have circuit boards that are specially coated with a protectant, have plated connections and positioned in a corrosion-resistant cover or chassis.

Audio units must be mounted on a boat using special mounts and other hardware, and often special mounting techniques, designed specifically for nautical applications. Care should also be taken to avoid different metals having direct contact and accelerating galvanic (electrolytic) corrosion. This is achieved with plastic separators being positioned between the different metals.

Fourth, the unit is internally equipped with full magnetic shielding. Fifth, specially designed mounting grilles and hardware is supplied with the unit. Finally, the best marine speakers are also supplied with a UV, salt and fog resistant thermo-plastic elastomer surround.




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