OP - Much good advice here.
Quick suggestion:
If you decide to proceed, do one speaker at a time.
Listen to the differences (if any) while playing a variety of HQ mono recordings.
Try a few setup locations:
1) Next to each other if you can switch L/R channels on & off remotely. Reverse the locations in case of room interactions.
2) Pull one speaker out to the sweet spot & listen for a while. Then switch them.
You won't get the stereo image / soundstage in this format, but it could allow you to assess other virtues and vices.
Try not to ruin them both at the same time ;-)
Just thinking...
Ken