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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?

  • Take it to a repair shop. – Tetsujin Jul 26 '18 at 4:57
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Leaked/dried ferrofluid? Misaligned voice coil? Bad solder joint? Bad track/wiper of a high frequency pot?

At any rate, sounds like a job for speaker repair.

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Have you checked what happens if you swap the speakers' cables at the amp? Does the problem stay with the same speaker or does it change sides?

If the latter, it could be the loudness tap/wiper/control on the amp instead of the speaker.

  • Changing the cable and changing to the right channel makes no difference; its definitely the speaker. – Nectar Jul 26 '18 at 9:55
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    Can we resist the temptation to answer totally off-topic questions? It gives the [perfectly correct in this case] impression that anyone can ask about anything & get an answer. – Tetsujin Jul 26 '18 at 10:44

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