Demonstration of air flow in front of the ports of my SVS PC-4000 subwoofer using a sheet of paper.

I also hold my phone against the wall toward the end so you can see how the walls shake the camera picture.

At the time, one of the 3 ports was plugged, for "extended" deep bass. These days, I run it fully sealed, because I like the punchier response.

Link to the tune I'm playing:
[ Ссылка ]

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