Ripole sub with 8"drivers

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Hello,

I want to build a repole subwoofer, using two Monacor SP-20 bassdrivers.
The main thing is, that I wanna build a sub as compact as possible, according to the space we've got in the living room.
These drivers are 8 inch. I've searched the internet for hours and hours and nowhere found a drawing with the measurements to build a ripole sub for 8 inch drivers.:mad::mad: Anybody got a solution?:) The most drawings on the internet are for subs with 12 inch drivers.:(
 
A design for a ripole subwoofer can be scaled, the dimensions are not critical. Unfortunately it will not work with 8" woofers. It does work in the sense that it produces sound, but the small dipole separation and the low displaced volume result in an unusable low sound pressure level.


Closed box subwoofers of similar size will play way louder.
 
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