Experience with adding super tweeter?

I guess it depends on the way your system sounds. Does it lack air?

I have owned the Townshend super tweeters when I owned the Eggelston Works Andra 2 speakers. These speakers had the Esotar tweeters that some raved about, but I thought they lacked the "air". The Townshend's improved the sound immensely.

And if I remember them correctly, I think you can select the crossover and sound level.

ozzy

I use a pair pf Muratar ES 103b with Duevel Bella Luna: provided you get millimeter precise positioning in phase with the rest of the speaker diaphragms the resulting increase in depth of soundstage and definition of the entire frequency spectrum including bass is nothing less than astounding. The other thing to watxh out for is obviously efficiency, where Duevel and Murata are close enough.,I have no experience with attenuators although they are needed where that condition isn‘t met. In any case well worth the experiment

Goofy idea....unless you get into active crossover implementation or mod the existing passive crossover. 

(It is nothing like blending in a subwoofer without bass management and getting away with it).

The PHASE thing: at 10kHz, the wavelength is 3.4 cm. So moving the supertweeter through that entire range is not too difficult, maybe in 10 steps of 3mm or so. 

But as with any OTHER speaker, the PHASE will only be "correct" (in line with other speakers) for one specifc frequency. So I guess speaker manufacturers may try to get the drivers 'into phase' at the crossover frequency? Or simply just ignore the it since it is OFF the whole time except for one frequency?

The phase thing is best established by trial and error. When it locks in, that is actually quite easily audible