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Ported subs offer virtually free improvement to low end output/efficiency depending on your preferred viewpoint. This relates very closely to profit for the manufacturers. To match the output using sealed enclosures requires larger or better drivers, or both due to the early onset rolloff. This is not a good selling point.In my view, the overwhelming weakness of ported subs is the huge increased in stored energy with relatively low damping in the system, rendering good step/transient response impossible, since the energy is dissipated over a relatively long time period after the exciting force (provided by the driver) has been removed. One has only to look at the step response of sealed against ported enclosures, which shows the massive increase in settling time of the latter. I believe that any ported speaker offers lower fidelity of reproduction in relation to a comparable sealed one.
Ported subs offer virtually free improvement to low end output/efficiency depending on your preferred viewpoint. This relates very closely to profit for the manufacturers. To match the output using sealed enclosures requires larger or better drivers, or both due to the early onset rolloff. This is not a good selling point.
In my view, the overwhelming weakness of ported subs is the huge increased in stored energy with relatively low damping in the system, rendering good step/transient response impossible, since the energy is dissipated over a relatively long time period after the exciting force (provided by the driver) has been removed. One has only to look at the step response of sealed against ported enclosures, which shows the massive increase in settling time of the latter. I believe that any ported speaker offers lower fidelity of reproduction in relation to a comparable sealed one.
