if your tweeter is too sharp your crossover maybe is not to good , to save money and not break the bank Foste X great Capacitor from Japan but limited in sizes,
Madisound carries them.
A Audyn Copper , or clarity CSA, Obbiggato Gold try the capacitors first
And resistors buy a mills resistor 12watt just find out the specs 250v is more then enough voltage.start there that is where more then 1/2 problems arrive from
In Loudspeakers.