Before doing anything drastic you might want to experiment along a different
path. Try a professional quality EQ unit and liberally experiment with
relatively small boosts in the midrange frequencies and/or cuts in the upper
midrange. You could start out with a cheap Behringer unit just to see if it
makes any sense and if you like what you achieve move on to something
more in keeping with the rest of your system. You won't have to change your
speakers (or amps/cables etc.) and the EQ is defeatable when you don't want
it.
path. Try a professional quality EQ unit and liberally experiment with
relatively small boosts in the midrange frequencies and/or cuts in the upper
midrange. You could start out with a cheap Behringer unit just to see if it
makes any sense and if you like what you achieve move on to something
more in keeping with the rest of your system. You won't have to change your
speakers (or amps/cables etc.) and the EQ is defeatable when you don't want
it.