T/S parameters only become useful if you intend using the driver around it's resonant frequency. Tweeters do not like operating this low in their frequency band. If you apply mid range power to your tweeter you will burn it out. If you apply mid range frequencies to your tweeter you will use up all and more of it's very limited excursion. This will destroy it. Do not operate your tweeter any where near it's resonant frequency. The crossover must be above this to protect the tweeter from excessive power and excessive excursion.
