That would work perfectly if he listened to music consisting of a single tone of different volumes…
Only way that could make any sense would be if he was trying to make sure the speakers were in phase. If you’ve ever had one wired backwards there’s an exact spot where you can get them to cancel out, it feels bizarre. But you don’t need to adjust the cones, just wire things the right way lol.
That would work perfectly if he listened to music consisting of a single tone of different volumes…
Only way that could make any sense would be if he was trying to make sure the speakers were in phase. If you’ve ever had one wired backwards there’s an exact spot where you can get them to cancel out, it feels bizarre. But you don’t need to adjust the cones, just wire things the right way lol.