It's the simple answer, distance from the top. I've always wondered why someone would want to do that. AFAIK, the highest compression for loading the vent occurs near where two or three panels meet. It also seems the most likely occurance of upper frequencies exiting the vent would exist with the port directly behind the driver. 
I'm trying to understand, but not only that ...
I'm tring to understand if I can do similar to the Coral RS3000 project.
That is a camber with the mids driver (Peerless HDS 134) on top, and a TL (Peerless HDS 182) on the base.
So I need some S0 for the TL (440 cm2 would be better, 405 cm2 -and a 152 cm line- still gives -with a 0.6 filling- acceptable results).
I would like to use the TL to get 20 more Hz and some sort of "baffle step compensation" (so the HDS 182 will go backward and will have an appropriate impendance in series).
I'm still simulating ...
Thanks
I'm tring to understand if I can do similar to the Coral RS3000 project.
That is a camber with the mids driver (Peerless HDS 134) on top, and a TL (Peerless HDS 182) on the base.
So I need some S0 for the TL (440 cm2 would be better, 405 cm2 -and a 152 cm line- still gives -with a 0.6 filling- acceptable results).
I would like to use the TL to get 20 more Hz and some sort of "baffle step compensation" (so the HDS 182 will go backward and will have an appropriate impendance in series).
I'm still simulating ...
Thanks
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