Jaguar XJS base rear speaker adaptor

So this is for the Base (convertable in my case) rear speakers. The original mid range speakers were an odd specimen no longer availalbe. So what I did is I found a mid range speaker (Dayton Audio RS150-4), 6 inch and moved it forward into the bulkhead as much as possible. This is what I came up with. It works. I made this two different ways. If you're doing a complete tear down as I have, I installed those screw in wood inserts to allow me to use a machine screw to mount the speakers. This needs to be accurately drilled into the bulkhead, in this case I used 4mm hardware and it needed a 6mm drill. So use the 6mm version as you can drill right through the adaptor hole into the wood, then install your inserts. If you want to do a refit in place, I suggest using the 4mm version and use a wood or sheet metal screw right into the wood. The rear cover I plan on just using a sheet metal screw right into the wood, as I"ll be going through carpet and it might be kind of tight. Printed these in ABS at 30% infil. At least 3 perimeters. I used these 4mm inserts in this model https://www.amazon.com/dp/B0CS6XGMFD?ref=ppx_yo2ov_dt_b_fed_asin_title&th=1

update 1-17-2026 - I had some issues printing the rear cover in ABS. I believe it has to do with the internal stresses as its cooling, causing the rear flat part to detach from the main body. So I redesigned it with just four holes and detachable tubes to the base to hold it tight. This has worked on both of my recent prints and I'm happy with this mod.

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