Free air resonance?

Ditto on the opinions that going to a tweeter with a lower Fs is at least a wash.

And, I am of the opinion, like Gregm, that getting the crossover point further away from the resonant frequency is a boon.

At the end of the day, unless the speaker was stressing the tweeter, you are not going to realize any benefit now, but if you ever want to reengineer the crossover, you have so much more room to play with now. You are moving to a tweeter which would allow a first order crossover, though that is not the question at hand.

While your point is well taken, Dr., with all due respect, I have upgraded tweeters many times, including this spring. Never with less than terrific results.

Replacing my Vifa D27 with the Scan Speak Revelators was a tremendous improvement in air, detail, not having the sound become irritating when the volume goes up, etc. Other than the money, there is not one facet of this changeover that took me a step backwards.

But, again, you raise a caveat.

Mitch, I am not sure what the doctor has to say, but I emphatically feel that with all of the money you have invested in upgrading the crossover and wiring, considering the pretty high level of the Hales woofer and cabinetry, the weak point of your speakers at this point is clearly, Clearly, CLEARLY the tweeter.

Tweeters are the drivers that have possibly come the furthest in the past 10 years. And, they sure had far to come. At that time, the Dynaudio Esotar, Esotec, Morel MDT33, and ScanSpeak Revelator were the best you could get. Outside of the Esotec and Morel, none could really be considered reasonably priced, but all were MUCH (orders of magnitude) more expensive than the everyday Vifa/Seas/whatever metal domes in most speakers.

In your case, unfortunately, you were on the cusp of the arrival of the better affordable tweeters, but fell on the bad side of the fence.

JUST UPGRADE THE DAMN TWEETER!!!!!!!!!!!!!!!!!!!!!!!!!!!!! You'll love it! But, as I also told you before, please give it 50 hours before you really judge it.