Loudspeakers differ from most other items of audio equipment in suffering from colouration, the tendency of various parts of the speaker — the cone, its surround, the cabinet, the enclosed space — to carry on moving when the signal ceases. All forms of resonance cause this, by storing energy, and resonances with high Q factor are especially audible.
Loudspeakers exhibit a phenomenon called coloration, where different parts of the speaker (cone, surround, cabinet, enclosure) continue to vibrate even after the audio signal is stopped. This occurs due to all forms of resonance, especially those with a high Q factor, which are audible.