Supertweets are great in theory but diificult to implement in practise (to do it WELL, that is -- which you SHOULD do as these tweets are VERY expensive). A few considerations:
*time-aligning the tweet to the main spkr: at 20kHz, the wavelength is very small, you're playing with fractions of an inch OR the tweet will out of phase with the rest
*relative amplitudes: can you bring the supertweet to the exact amplitude?
* Not LEAST: musical info over 20kHz in redbook??? (OTOH you DO have info on LP, and other hi-rez)
Mostly, you'll find that the 1st order x-over has the supertweet simply overlaping with your regular tweet, increasing amplitude in the 5-15kHz region (with some distortion). You can do the same with a regular (i.e., cheaper) tweet...
But I agree, the idea of having response up to 100kHz is beguiling!
*time-aligning the tweet to the main spkr: at 20kHz, the wavelength is very small, you're playing with fractions of an inch OR the tweet will out of phase with the rest
*relative amplitudes: can you bring the supertweet to the exact amplitude?
* Not LEAST: musical info over 20kHz in redbook??? (OTOH you DO have info on LP, and other hi-rez)
Mostly, you'll find that the 1st order x-over has the supertweet simply overlaping with your regular tweet, increasing amplitude in the 5-15kHz region (with some distortion). You can do the same with a regular (i.e., cheaper) tweet...
But I agree, the idea of having response up to 100kHz is beguiling!