My hifi has two speakers The left speaker, when I start to play something (after having had the unit switched off for a while) will reproduce low and mid frequencies fine. It will not reproduce high frequencies. It makes the sound sound very flat.
If I increase the volume greatly (to uncomfortable levels) then the speaker will ‘pop’ for lack of a better term and begin to work properly. I can then decrease the volume back to where I want it.
Why does this happen? Is there a proper name for it? How can I permanently fix it?