Group Listening ~ It's SIMPLE!

Hooking your DolphinEar to a speaker system

If you're taking guests out on a boat, then you probably want to hook your DolphinEar up to a speaker system. This IS EASY TO DO. There are several options depending on your existing equipment and needs.

Connecting to a PA (Public Address) System

If you have an existing PA amplifier and speakers, you can connect the DolphinEar to the AUX IN connector of the amplifier. You will need an appropriate 'patch cord' to run from the DolphinEar to the amplifier. On the DolphinEar end, the connector is a standard 3.5mm (1/8 inch) stereo plug. (The tip and ring are connected together so both channels are the same.) On the PA side, you'll need to match the connector that fits on the amplifier's Aux In input. There is plenty of audio drive from the DolphinEar and you can adjust the volume level as needed with the volume control. (NOTE: Some stereo/CD amplifiers on music systems have an extra input line for external devices, you might be able to hook your DE there too!)

Connecting to a Automobile-style Amplifier

If you don't have an existing PA amplifier you might consider using a 12 Volt automotive style 'booster' amp. These have 'CD' or 'LINE IN' connections where you can connect the DolphinEar directly. Again, you'll need an appropriate 'patch cord' with a standard 1/8 inch (3.5mm) stereo plug on the DolphinEar end, and a mating connector for the amplifier. Many amplifiers will come with cables already. Remember you don't need a 'stereo' model, a 'mono' unit will works as well, though most of the 12 volt auto amplifier will be set up for stereo. Adjust the volume control on the DolphinEar for the best sounding audio.

Connecting to a Portable Battery Operated Amplifier

If you are using the DolphinEar from a small boat such as an inflatable, a dinghy, or a kayak, then you might want to consider a battery operated amplifier. These work great for small groups of six to ten people in close proximity. These are generally sold as 'amplified speakers' and have self contained batteries (usually 'AA' or 'C' cells). You can find them at Radio Shack, Tandy, Maplin and many other electronics stores as well as some computer outlets. These work quite well and aren't too expensive (generally US $20-40). These amplifiers usually have 3.5mm connectors that plug directly into DolphinEar. If you like, you can mount the DolphinEar and the portable amplifiers in a waterproof case (like the ones made by Pelican).

Connecting to a 12 Volt Electrical System

One thing to keep in mind when trying to connect to 12 volt boat power is that the noise generated on marine electrical systems can be a problem with amplifiers and with DolphinEar. Using a battery operated amplifier like the ones described above may be the preferred way to go to avoid any extraneous noise and hum. DolphinEar can be operated from its own internal 9 volt battery.

Questions about specific installations?

If you have an unusual installation, contact the DolphinEar Technical Support Team. They have years of experience with oceanographic and marine installations and can help you with any problems you might encounter. You can reach them by e-mail at: