I just tried two different boxes on Winisd- one was a 1.5 sealed box, the other was a 2 cf ported box tuned to 30hz. At 30hz, the ported was around 5 db's louder. At 40hz also 5 db's louder, 4 db's at 50hz, and around 2.5 db's at 60hz. That is all with the same power. So, unless Winisd is...