Amp frequency requirements for super tweeters?

There's so many variables at play in a situation like this, that you really can't get a solid recommendation without a lot of effort. If this is something that you feel you need because you are trying to correct a problem in your system, they by all means, look into it. If not, then I wouldn't bother with it.

I should have also mentioned that I haven't heard them either. My first post was just a best guess and nothing more. Come to think of it, there's a pretty good chance The Cable Company may sell those type of tweeters. If they do, they'll almost certainly have a demo pair to lend out. If you're really interested, its definitely worth a call.

It's been a while, but didn't Whest come out with a component that was to help meant to address that very issue? And if so, would it make sense to go with a super tweeter, or a component like Whest makes?

The Whest Audio DAP.10 is the component I mentioned in my last post. Looks like its been discontinued. I'm pretty sure Stereophile reviewed it, but I couldn't it on their web site.

"01-16-15: Atmasphere
How could another component open up the bandwidth of an amplifier??"

If I remember correctly, it was a box that went between a CD player and the preamp. Redbook specs call for the CD's highest frequency to be 20k, and then it cuts off. I believe the purpose of the component was to try and re-construct frequencies above 20k using the information that was already on the CD.

But its been a while since I read about this component. There's a good chance my details are not all correct. I'll try to find more info for you, and I'll post it.