I just committed a similar misjudgment but wasn’t so lucky.
I was installing new speaker cable using banana plugs but didn’t remove the spade lug already attached to one of the amplifier leads. Actually played fine until I tried removing the spade lug. It wouldn’t come off easily. When I tried forcing it off I heard a terrible screech in one speaker. The speaker still played, but when I compared it to the other speaker there was a definite deterioration in the sound.
Most likely blew the tweeter. I sent both the amplifier and the speaker out for repair.
I was installing new speaker cable using banana plugs but didn’t remove the spade lug already attached to one of the amplifier leads. Actually played fine until I tried removing the spade lug. It wouldn’t come off easily. When I tried forcing it off I heard a terrible screech in one speaker. The speaker still played, but when I compared it to the other speaker there was a definite deterioration in the sound.
Most likely blew the tweeter. I sent both the amplifier and the speaker out for repair.