SA 8 v.3 d4

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I have 2 sa8 v.3's with an audiopipe 1500 monoblock amp.I'm looking for specs to a 4th order bandpass box.I want low authoritive bass,well whatever the 8''s can reproduce.Any suggestions on the numbers for the sealed,ported chamber,port length,port size,cubic ft.what kind of wood etc...Any help is greatly appreciated.Thanks!