Laura,

i have a keyboard. Would that work to test the tweeter and the woofer? I
tried hitting all its keys loud. Everything sounded fine except that there
is an increase in hiss from the tweeter

If you can play loud and the woofer doesn't distort, then all seems to be
working.

i'm mostly hearing the woofer.

Were the woofer, tweeter, and crossover designed to work together?

--Ethan