Isobaric 4th order question

[Jroo 10+ year member]

I understand all the pros and cons of going isobaric. I am trying this just for the size and thought it would be fun. I found a bunch of clearance 6.5 subs that looked good sealed and was told ok in a 4th order. My question is around the port and the bandpass side. I have a calculator that shows what the 4th order would look like. If I go iso, I know I cut the sealed section in half, but do you leave the ported section the same? Im thinking about trying 4 to 6 of these drivers and what to know how the ported/bandpass section is affected when I double the drivers?

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[Phoenix Risen 10+ year member]

what subs are you going with?

 

[helotaxi 5,000+ posts]

You cut everything in half since you effectively halve the Vas of the single driver. What you could do is use the design for a single driver and if there is enough space in the dividing wall run a duo of iso-pairs.

 

[Jroo 10+ year member]

does that include the port as well? I am being told a couple of things. One is the sealed section is cut in half but the port/bandpass side will stay the same.