Transmission line Subwoofers?

Does anyone know of any commercially available subs that use a transmission line design?

dfwlistener07-23-2015 8:49pm

bill_k Details Discussions Posts This discussion Message User 880 posts 07-24-2015 at 11:04pm Copy Comment URL Report Comment Edit Delete I have no direct experience with them, but TBI Audio Systems has subs which use what they call ETL (Embedded Transmission Line) technology. http://www.tbisound.com/index.asp