Macintosh IIci or Iicx speaker adapter

This adapter allows you to replace the original rectangular speaker on a Macintosh IIci or IIcx with a new stock speaker that matches the resistance and power rating of the original.

It allows use of a "uxcell 0.5 W 32 Ohm DIY Magnetic Speaker 40mm Round-Shape Replacement Loudspeaker" (found on Amazon). You can insert the speaker into this adapter, and then insert this 3-d printed adapter into the original speaker mount. I used tape to secure the adapter to the speaker mount.

Note this is only to adapt the round speaker to the rectangular opening on the existing speaker mounting bracket. This is not the full mounting bracket. Fortunately, that mounting bracket appears to use more durable plastics than many of that era, so it shouldn't need replaced.