hmmm, I've had a lot of ppl comment on how vented boxes cause the speaker to move more...
Try this on your vented sub:
First find something with a fairly constant bass track to play. Look at the movement of your sub (ie get an idea of how much its moving). Now take a sock or something similar and stuff the port so no air can get thru (freely). Now go take a look at the movement of the speaker again. If you take the sock out while its playing you should definitely see a difference. What kind of difference you ask? Well you might be surprised.
