I agree, a device in line to switch polarity would be best.
If not:
I used to frequently change among 3 setups: R2R direct to tube mono blocks 30 wpc; tube receiver for radio and phono 35wpc; CD/SACD direct to either tube mono blocks or SS 300 wpc.
Three color coded sets of speaker wires, each with banana plugs
I put a WBT Banana Plug ’JOINT’ in my speaker wires a few feet outside of the speakers: that I can reach, pull forward, change standing up, toss the wires back behind the speakers.
https://www.thecableco.com/wbt-0610-cu-nextgen-signature-safety-line-single.html?Color=Red&gclid...I added a hook on the wall behind the speakers I can reach to get/keep the wires more easily available, seeing as how I am an old dog with bad knee, bad back, bad attitude.
Would something like that solve things?
Wear em out, good luck with that, but if so, put some new ones on.