Leaderboard

Tuning a 4th order enclosures port has nothing to do with the bandwidth of that enclosure. Tuning is just where the enclosure peaks at. Bandwidth on a 4th order enclosure mainly has to do with the ratio. A 50hz peak would not affect the enclosures bandwidth. It would affect the output of the enclosure. It’s best to peak around 45hz. Doesn’t have to be exactly 45hz, just around that to generate the best output. If you have decided on bandwidth over spl, then you would have to focus more on the ratio and leave the tuning around where I said with about 20sq” of port area per cubic foot of the ported section and then make the ratio 2:1 like you said. So let’s say the ratio is 2 cubic feet on the sealed section and then 4 cubic feet on the ported section, port area would be 4x20=80sq”. Make sure you factor in displacements of bracing, subwoofers and port if the port isn’t 100% external. So net volumes are what is calculated into ratio and port sizing.