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

g_m_c Details Discussions Posts This discussion Message User 443 posts 11-22-2002 at 03:25am Copy Comment URL Report Comment Edit Delete go to the meadowlark.com site. there are explanations there, along with great speakers.
g_m_c Details Discussions Posts This discussion Message User 443 posts 11-23-2002 at 08:31pm Copy Comment URL Report Comment Edit Delete Ohmmmmmmmm.