THOR was designed by Dr. Joseph d'Appolito, who is world-renowned for his pioneering work on MTM-based loudspeaker configurations.
He offers the following comments on THOR:
"Transmission Line loudspeakers have long enjoyed a small, but dedicated following. The advantages of TL's are well known. They are essentially
non-resonant enclosures, producing a deep, well-controlled bass response. For a given driver, bass response will extend well below that produced
with either a vented or sealed enclosure using the same driver. Above a few hundred Hz, the line filling material completely absorbs the driver backwave, giving the TL an open, non-boxy sound.