I was really intrigued by the recent video, too.
Specifically, I wondered:
1. whether Axiom will release specifications for various speakers with the port plugs in
2. whether the plugs provided by Axiom are completely airtight or whether they provide an aperiodic box alignment
3. what the real-world ramifications are regarding extension, sensitivity, power-handling, etc.
TAM, thanks very much for sharing your experience.
I first saw port plugs as an option used in HSU subs and later their hybrid equivalents from Outlaw that provided a port plug as an option to give a little more bass extension at the lowest levels. With its usage, however, comes a slight reduction in potential SPL output so I assume the concept is similar in the M100 but only in subs and speakers that are capable of low bass extension otherwise, I don't see much value in them.
I have an Outlaw sub with the optional port plug and tried it both ways and honestly, I couldn't hear much if any difference.
