Just what is Advanced Transmission Line?
Transmission Line Speakers are designed to extend the response of a traditional speaker.
The cabinet is designed to create a long internal tunnel to extend the response of the bass driver. To do this effectively is very difficult! PMC has perfected the art of Transmission Line Speakers into what it calls Adavnced Transmission Line.
This requires very careful engineering and a speaker that is very carefully thought out, from driver selection to crossover design and placement.
All PMC speakers, from their entry level to their largest Studio Monitors is designed in this way. Have a look through PMC's products here:
"The result of this care is apparent from the first moment of listening. Speakers that sound bigger than they should, but without the bloated bass of ported designs. The sound is linear, low distortion and very transparent."