how to design a series tuned double bass reflex/ABC enclosure

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Puggie

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Joined 2004
I would like some pointers on how to design a 'series tuned double bass reflex' also known as 'ABC' box. The type of enclosure with the driver in a ported box, but the driver fires into free space and the port fires into another enclosure which is then ported into free space.

the MJK worksheets have a model for this type of enclosure but I would just like some pointers on where to start my design. I'm looking at using an old JBL gti sub with the following parameters:

Fs 37Hz
Vas 56.6l, 2.4CuFt
Qe 0.52
Qm 4.89
Qt 0.47
Xmax 11mm

any advice.
 
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