Question

what made the speaker suddenly feel alright​

Answer 1

Reasons for distortion

• A microphone or sound source, like a computer, is overloaded with sound. ...

• An instrument sends too hot of a signal into the system. ...

• Speakers are being pushed beyond their limits. ...

• Amplifier clipping. ...

• Faulty equipment.

Answer 2

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It sounds like you have had a large transient through your speaker and you are now worried that you may have damaged it.

Think about music - all the drums, cymbals, and large sudden musical events are transients.

So all sepakers encounter transients as an expected thing. The question is when is it too big.

Two things damage speakers more than anything else - playing at extended high volume with lots of distortion can overheat and permanently damage the speaker elements but this is clearly not the case.

The other thing is overdriving it to where some phsyical damage is done. Speakers make sound by moving a magnet against a magnetic field of a coil. The larger the motion, the louder the sound. If the motion is too large then you can break or tear cones and or rip the surrounds - the flexible rims at the outer edge of the cone.