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Super tweeter for FullRange Driver

I have a pair of Audio Nirvana 15in Alinco Classics that I just got done getting into cabinets. After some listening impressions, I've realized I cant live with the high frequency response these things put out by themselves. They only go to about 15k hz. and it's made music lose its sparkle and sense of space and spacial cues. I was thinking of buying a pair of Fostek T90As and pointing them at the ceiling for a more even dispersion and better integration with the Audio Nirvana driver. My main question is what  capacitor volume would you suggest? Where in the frequency response would you crossover to the tweeter? Would wiring the 8ohm tweeter and the 8ohm Audio Nirvana in parallel make me need to change my amp(Audio Note Kit 1 300b Set) from 8ohm to 4ohms? Any other brands of tweeters recommended for a fullrange driver that is around 96bd efficent? Sorry for all the questions, incredibly new to trying to implement crossovers with full rangers. If this sounds like a bad idea. Please speak up. 
akwilson501

Showing 3 responses by bache

bache's avatar
bache
502 posts
 
@akwilson501 === (They only go to about 15k hz.) --
 How you know you driver go to 15k hz ? and what is level -10 db or more?    The sparks is 9-10Khz. 15Khz is not listenable and just add more air. To add super tweeter and make pretty flat response ( not to bright) is very complicated, You have to use you ears and also measuring
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bache's avatar
bache
502 posts
 
$10000 for pair
bache's avatar
bache
502 posts
 
This discussion remain me how is different the taste,  i dont want to tell the famous brands on the market now which use one full range driver
with double cones  , main cone and whizzer, which play a tweeter-super tweeter role, and say the sound is beatifically, Conclusion-   some like piece a paper as supertweeter , some need plazma . sorry for my english 
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