"How can classical music sound natural at a heavy volume ? "
The answer to this interesting question lies in the attendance of classical music concerts parrtucularly orchestral, choral and operatic ones. You will be surpised to find out that SPL at your ear varies from zero to about 115 dB (if you happenn to conduct the orchestra during this attendance as well).
This variation is not in the form of the since wave (as most of amplifier manufacturers try to convience us with many useless specs) but according to the capricious imagination of a composer and even more capricious interpretation of a conductor.
The answer to this interesting question lies in the attendance of classical music concerts parrtucularly orchestral, choral and operatic ones. You will be surpised to find out that SPL at your ear varies from zero to about 115 dB (if you happenn to conduct the orchestra during this attendance as well).
This variation is not in the form of the since wave (as most of amplifier manufacturers try to convience us with many useless specs) but according to the capricious imagination of a composer and even more capricious interpretation of a conductor.