This is something I have been curious about for many years but so far no one has been able to provide a good answer. Seems like a pretty simple question,....how does volume level affect a crossover point. I mean if I have some small, sealed, two way bookshelf speakers with a frequency response of 85Hz - 20 kHz +- 3dB, 2.83V @ 1 meter and I set them as large, no sub,... what happens? If I play music at very low dB does it make any difference what frequency range the speaker can produce vs. the frequency range at reference level? Or does this speaker (in general) reproduce 85Hz - 20 kHz no matter the volume level? Or, does it depend on the internal crossover and what the designer did to prevent damage to the speaker?