A description of "loud" is very subjective.
Use a sound pressure level measurement device (a SPL from Radio Shack) to better quantify your question.
Some ppl consider 80dB to be loud whereas others may think 100dB is not loud enough.
Most bookshelves of that size can reproduce a fair amount of sound but depending on yout room size, you may have considered full size towers instead.


"Those who preach the myths of audio are ignorant of truth."