Quote:
Originally Posted by PHC1
If you have a technical explanation how the transmission line delay of lower octaves is accomplished, I would be curious to hear about their solution.
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PMC transmission line speakeres are different from others becaused of the special absorbing material that is used to line the tapered transmission line. This causes mid and upper bass frequencies to be absorbed while allowing low bass frequencies to exit the vent
in phase with the main bass driver.
Here is one article that helps to explain the concept.
http://studiospeaker.de/SMM/PMC_Tech...%20by%20PT.pdf