What is the ideal High Freq extension?

"I think the music should dictate the frequencies" Absolutely agree. I also agree that room and its contents would give you treble limitation. But say if you are 'designing' a dedicated room around your system what would you target the roll-off?

Per Shadorne it is the certain tweeter (silk dome, metal dome?)design that seem to be the problem/limitations and that electrostats do better in reproducing a true high freq response that does not sound hockey at live levels. How about ribbons? horn? Berrylium and the thingamjig?

Why can't the high end manufacturers finally solve this common basic problem then?

Detlof,

Sure I would certainly be interested to know the your acaoell tweeter experiment. How did you measure your Sound lab extension to 20K hz? Via Sound meter? with necessary correction applied? ( Here in US we have Radioshack sound meter that I typically use).

CKoffend, thanks for reminding me that live music extends well past 20 Khz (How can i forget? with recent threads comparing analog vs digital medium) as much as like 70k hz and beyond for certain instruments.

So in a perfect system you would want 'flat' response to and beyond 20khz- No roll off. Hmmm Now It makes sense why some audiophiles(Detlof and some other I know)prefer super tweeters hooked up to their main speakers.

Now that I think and look back I do remember auditioning a super tweeters in an all audio note system and discerning difference between these tweeters being on and off!

Any recommendation which super tweeters to try with my Dunlavy Vs?

I think spectral analyzer would be more accurate way to measure system system response at your listening position. I think the Ratshake sound meter may not be accurate the freq extremes even with so called corrections applied.

I measured my system response at about 7 ft away (my seating position) and it is RULAR flat ( with corrections applied) from 25 hz to 16 khz. with 2 db boost at 20 hz and 7 db down at 20 kHZ.