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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 4 responses by akwilson501

akwilson501 OP
50 posts
 
Thanks for the response Duke. Do you suggest I throw in a resistor or two to help attenuate the volume, or some kind of Lpad? I'm guessing the T90As will be significantly louder than the Audio Nirvanas due to there higher sensitivity. 
akwilson501 OP
50 posts
 
I appreciate the feedback from everybody. Why I would love to try both the magnats and the enigmacoustics, I'm going to work with some fostex t90a's at first to see if I like what they add. If so, I will upgrade at somepoint, so thanks for the advice on those. I'm trying to cross my tweeter over around 15khz, wouldn't a .33uf capacitor be ideal, in a 1st order filter? Considering the 106 db on the fostex, and the 96db for the fullrange.
akwilson501 OP
50 posts
 
3uf and 1.5uf seem as little high doesn't it. 
akwilson501 OP
50 posts
 
Hey everyone, thanks for the help, the community has came together wonderfully for me as usual. I am just getting around to adding the Fostek supertweeters to the Audio Nirvana 15in. I ended up going with a .33uf capacitor with an lpad to attenuate the volume of the tweeter. It pairs up wonderfully with the driver and does exactly what I wanted it to. Really opened up the sound stage and added extra detail to everything. Music is much smoother and bass seems more realistic as well. Everything just flows better now. Couldnt recommend more. I will be saving up for some better tweeters at somepoint, for now I'm satisfied. 
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