Bp1fan,
You should download AkAbak - it is not that hard to use. The script I posted earlier should get you started on a 6th order BP. Adding a vent between the two chambers is just another line or two of code. HR is a wonderful program - especially the interactive speaker wiz for tweaking an initial design on a tapped horn. But you quickly run out of segments or interconnects if you want to try something unusual.
You should download AkAbak - it is not that hard to use. The script I posted earlier should get you started on a 6th order BP. Adding a vent between the two chambers is just another line or two of code. HR is a wonderful program - especially the interactive speaker wiz for tweaking an initial design on a tapped horn. But you quickly run out of segments or interconnects if you want to try something unusual.
I downloaded Akabak years ago. I never really played with it. The simplicity and accuracy of HR has kept me away from other modeling software. I don't really need that many segments to model since I would build a 7 board 3 segment TH (positive, straight, or negative flare) before I would build a multi board BP6 or BP8.
Apparently, you didn't READ...
V front = 1ft3.
V front port = 1.26ft3.
V rear = 6ft3 (169.9L / 28.317L).
V rear port = 1.89ft3.
V speaker plate = 0.11ft3 (0.75" stock).
V total = 10.26ft3.
You can convert between passive radiator and port by taking the SA of the port = SA of the passive radiator. Mass of the radiator = mass of the air inside the port.
A port is an RL circuit model. A passive radiator circuit model is an RLC. They behave differently. All else being equal, you can get lower tuning in a smaller amount of space with a passive radiator. The price is group delay.
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