I found a Klipsch ProMedia THX 2.1 amplified speaker system at a second hand store ($15). One of the grills was missing. So.....
Note: This speaker system has a serious design flaw. One of the speakers was cutting out. The left/right speaker connections (mono 3.5 mm jacks) are prone to causing intermittent connections. No wonder these systems are showing up in second hand stores!
There is an easy fix - open the speakers (4 screws in grille pin sockets), disconnect the spade wiring connectors, forcefully rip out the sucky jack from inside with heavy duty pliers, and solder in a length of speaker wire to the blades where the spades were (observe polarity). Thread the new wiring through the hole where the jack was, and tie a knot (inside the cabinet) to eliminate stress on the solder connections. There was no stress relief in the original flawed design.
The system now sounds better than new.
- Support structures are built in - turn off all supports in slicer.
- Use a 2mm brim (or more).
- I printed 2 of these in PLA on the same build plate - worked well - orient so that the front sides face outward. Allow the brims to merge for better stability.
- Use external fans if printing in PLA to reduce warping.
- The support structures are hollow - even when using 100% infill (recommended)
- Cut the supports near the middle, and gently rotate off the pins.
- IF NEEDED, wrap the mounting pins in electrical tape for firmer (and rattle free) fit.
With calipers, 123D Design and about a dozen hours of futzing.