The most powerfull amps I have are 30 watt tube.
So are these identical to Santanas? I have a pair of those with the 420-8B 16" frame woofs that are absolutely mint.
So now I will have no less than 6 sets of Altecs. From A7's on down. It's a sickness I tell you.
But if I ever go surround sound, I'm set!
Your tweeter project sounds intriguing Old Guy.

Ron