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Quick video I made showing the difference in Excursion between a sealed sub and a ported sub. There was no subsonic filter used, as the oldschool Rockford Fosgate amplifiers do not have a subsonic filter. Before anyone says anything, these subs are on separate amps, in separate chambers, 2.5cf after displacement. The specs are the same sealed or ported with these subs, check the manual... RFR2215 PowerDVC. I ported external to preserve the original internal volume. I can change tuning by lengthening the port if I want tune lower, or plug the ends to run sealed. You can see that even though I'm tuned at 30hz, I can play well below tuning without bottoming out the sub. Most music will not drop below 40hz and even hiphop not below 30hz with the exception of a few decaf tracks and those maybe down to 25hz, which will still be fine... #SealedvsPorted #caraudio #basshead
