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There are intercoms for motorcycles that may be less expensive.
But you can use aviation headsets. Passive sound suppression headsets work pretty well and you can get good quality headsets on ebay fairly cheaply. But you will need (at least) a portable intercom module to plug them into. New, it costs about $160 and allows you to plug in a music source. (They can be found on ebay as well.)
The good news is that it works well. Downside is there are a number of wires and the 9 volt battery that powers it has to be replaced regularly.
You can also get an intercom that you can install, will run off your 12v system, will allow you to import a signal from a radio or mp3 and just let you plug your headsets into jacks in, or under, the dashboard. Pretty trick. All of the intercoms have auto muting so they will decrease or fully mute the music when you talk to each other.
If you go the installed route, just make sure you get an intercom for an experimental aircraft. These cost a fraction of the FAA tested and registered intercoms for certificated aircraft. It's easy to find them in 12v.
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James
Last edited by RF5BPilot; 03-02-2015 at 08:29 AM..
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