I just heard about some ear buds which are quite efficient. They use multiple drivers for each frequency ranges.
Here is a link to a description of them: <http://news.cnet.com/8301-13645_3-20005384-47.html> More here: <http://www.jhaudio.com/store/> I think it would be fun to test them in the field. 73, Kevin. KD5ONS ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html

