What is a "transmission line" speaker?

Maybe I'm a dummy, but I don't know what differentiates a transmission line speaker from any other type of cone drive speaker. Please explain.

jphilips11-21-2002 7:26pm

piet Details Discussions Posts This discussion Message User 31 posts 11-22-2002 at 12:19pm Copy Comment URL Report Comment Edit Delete Sean, Thanks for your elaborate explanation. Do I understand correctly that a TL speaker can be tuned to a specific listening environment? Example?