The principle at work is the same though ie the rear side of the woofer is coupled via the air in the cab to the PR or air column in the port which then resonates in sympathy.
For a typical BR spec vent size, but IME (and IIRC also Tom Danley's) using a simple BR vent's air mass to find the weight of a PR is spot on when using the correct air mass density and of course when the vent area (Av) = the PR's effective piston area (Sd), which due to it needing an ideal ~> 2x driver effective piston area (Sd) dictates a ridiculously long vent (Lv) to reach down into the (sub) bass.
My big subwoofer system sounds good in 35 square meters. Eight 18 inch drivers do a crisp sound without any distortion.
No problem with big woofers in a home hifi system.
https://www.diyaudio.com/community/...how-off-my-new-18in-build.365764/post-6711139
No problem with big woofers in a home hifi system.
https://www.diyaudio.com/community/...how-off-my-new-18in-build.365764/post-6711139
I will testify to that, from some fiddling with our SVS SB-2000 Pro. We like it very much, but wow it shakes at high SPL. I mean as a loudspeaker engineer I knew that theoretically, but seeing and feeling it was really a shock. I would really favor mechanically opposed designs in the future, though AFAIK there are not so many choices (??).
Subs? Or speakers? I read that myth often about speakers. Myth started by unfortunate coincidences. Yeah in small rooms modes start at higher frequencies so a less extended response from the satellite speakers could sound less bloated in some cases. For subs, if the crossover is well set, it shouldn't be an issue, unless the sub is tuned kinda bloated which surely some are. My preference for subs or satellites has long been "undertuned" designs, with a port tuned lower than "ideal" to maximize the -6/-10 dB points* and have a rolloff more like sealed.
*as I've posted elsewhere, the -3 dB point was just a mathematical convenience and convention from electric filter design that Dick Small used in his original thesis. In a conversation we had in Indiana when he was working at Harman, he agreed in rooms the -6 or -10 points probably mattered more due to room gain.