Has sonic perfection been acheived?

Maximum output at xmax in a sealed box will be 76dB @ 80Hz, 88dB @ 160Hz, and it finally becomes useable with 100dB of output at 320Hz.

If you prefer your music at realistic levels you'll need either a cross-over in the middle of the human vocal range or a line array.

CDs have been offering perfect sound forever since about 1980.

Thanks Drew, very useful. How did you calculate those numbers?
So the purpose of a line array is to give more volume? How about more detail or bass extension?
Cwlondon oh yea, forgot about that one. What the heck are we all doing here :-).