2. speakers
  3. 155429-129255

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
cedargrover
302 posts
 
Those are nice full range drivers and you have a good amount invested in them. If it were me I would consider getting something like the Dayton Omnimic system to test your design.  Danny at GR Research did a video on adding a super tweeter to a full range and was of the view that there are often phase issues that cause unpredictable response unless you test and compensate. 
jdal
156 posts
 
My Bache Audio Tribeca’s use the Fostex FT96 EX-2 tweeter with a modified Tang Band wide band driver. I believe it’s crossed over around 8K. It’s a great sounding tweeter. You may get good results aiming it at the ceiling. Another option would be to aim it straight ahead into the room. Assuming that the Audio Nirvana drivers are positioned with some toe-in.
sunshdw's avatar
sunshdw
239 posts
 
I had the Aperion Audio super tweeters on top of my 8" AN speakers and they did enough for me. They've got a decent amount of adjustment which is handy. 
bdp24's avatar
bdp24
9,445 posts
 
I strongly 2nd @cedargrove's suggestion to watch the GR Research Tech Talk Tuesday video on You Tube, wherein Danny Richie explains and demonstrates all that is involved in adding a tweeter to a single-driver design. You'll be very glad you did!
alexberger
862 posts
 
I use Fostex T90 forward-firing with Altec 604E.
This combination works great.
I use first order crossover and Werner Jagusch auto-transformer to decrease output of super-tweeters. I use 1uF AN Copper capacitors. I’m not sure they are the best for this application but they work good.

Back of ceiling firing tweeters sound horrible!!! It completely destroys focus and sound-stage.
I don’t understand why some people use back of ceiling pointing of tweeters.
Probably people are too lazy to make a phase alignment of tweeters. When alignment is done properly, super-tweeters sound together with the main speakers.
More to discover