Old Realistic 5" drivers worth messing around with?

It's a good question because ideally gasket segments should extend around the mounting holes to prevent air leaks when rear mounting.

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I think the drivers are intended for front mounting and it may be that the four hard segments are purely decorative - although they may provide additional support to the glued down fabric surround.
 
Yes, I would also guess those four sections are integral to the glued structure of the surround...That said, fortunately the backside edge is fully designed to mount the driver from the front with an even surface , some drivers are not well designed & mounting them from the front, they seem to give you very little or no surface area to work with.

------------------------------------------------------------------------------------------------------------------------------------------Rick...
 

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some drivers are not well designed & mounting them from the front, they seem to give you very little or no surface area to work with.

The Visaton FR 10 you illustrate above is intended to be rear mounted such that the protruding annular gasket fits snuggly inside the mounting hole.

That is, the driver is 'plugged into' the 100 mm diameter cut-out in the box from behind.

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That "plugged in" effect from the backside gives one the advantage of radiusing the opening, the thickness of the wood determining the radius value....just be sure to have that small 4-5 millimeter lip of the annular gasket. This woodworking gets you an esthetic look and a bit of a horn/waveguide.

-------------------------------------------------------------------------------------------------------------------------------------------------------------------Rick…
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