Permanently sealing a vented subwoofer??

Nice theoretical desctription. It is pretty obvious that the acoustic suspension of a vented box is different to that of a sealed box, and that this will affect the mechanical action of the drivers.

The only problem with the theory is that foam plugs can actually work to give the desired effect. I grant you the solution is not optimum, but if buying new speakers, or changing their room placement is not an option then plugging reflex ports can get the job done adequately.

Foam in the vent will not stop airflow, but merely change the velocity and volume of the air movement.

The original premise that sealed is superior to vented is suspect. If properly designed either type will work. It's a question of trading off different sonic and/or practical compromises.

Foam bungs? Great name for a band.

Well designed ported subs (most), and I am talking about true subs here...work as well as sealed IMO.

Ported bookshelf and mini speakers are a different story, most try to do a little to much, with very few well designed examples that I have listened to...thump, thump, thump...chug, chug, chug.

Small room and low volume is the best many can do before the port noise sets in.

Dave

lol great band name!