That's definitely one for AkAbak.
Yeah, I suspect best left there too.
I can't say I'm convinced it's worth it (or by the volume division for that matter), but interesting in the abstract.
I have heard these speakers, that they sound fantastic is an under statement. Amazing what that 4 inch speaker can do in that box. Ben's write up is spot on, that contour filter is necessary.
George
that's interesting - might the 2-1-1 ratio of chambers with all equal ports be something rather universal ?
not sure what the cascaded extension of the DBR can do
It's funny this topic should come up, because I happened to design this about a month back for the forthcoming Stereo Magazine (Japan) OM-MF4 drive unit.
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