I agree with Mojo, but will add one other small thought.

Remember: the way that the frequency scale works there is very little real-world difference between hearing up to 15K and hearing up to 19K.

The 4Khz between those points is NOT the same as if you were losing 4Khz between 6Khz and 10Khz for example....

::::::: No disrespect to Axiom, but my favorite woofer is my yellow lab :::::::