[моё] Can someone maybe suggest something

Background - a car speaker, over time, well, more precisely, the wires decided they’d had enough and snapped off, and I, well, what about me, I don’t want to buy a new one, really, and why should I?, especially since it’s expensive as hell, and I can solder, what, won’t I manage or something.
In the end I fixed it, there were stranded wires, I made them from braided twisted pair - and what do you know? they broke from vibration) (stranded wires had the same story).
What other wires can I try? Or is it better to just fill it with glue so the vibration is simply distributed through it?

And what about taking and braiding such pigtails out of the copper wire from Soviet cables (not the junk from twisted-pair wire, where it’s copper-plated aluminum) and, most importantly, twisting them into little springs, like it used to be done in phones from the handset to the receiver?

Yes, in such springs self-induction can occur ) I don't want to add a diode yet )

I wish I could find more Soviet wires )

I didn't take that into account (

In the power cords of old electrical appliances?

there aren't any )
oh, by the way, there are some from the power supply, I'll try them

What about taking an AWG cable? It seems that aluminum is not used there, only copper. 

Radio parts stores to help