wwtww with nd105 design thread input please!!
Geeze finally I have gotten to the point I can post my plan and see if any of you gurus have some input that may point me in a better direction....if anyone notices something wrong please point it out.
I built a pair of nano neos, and a custom version of a ntn for a center channel and are very impressed. So I got it in my head if I build a wwtww with the same drivers it would probably do what I want for 2 channel without a sub when I have time to sit down and actually listen to the music, rather than watch movies or just have the music in the background (like it always is)....
So here is my plan of attack:
I will build a wwtww based on the nano neo/ntn build. I do not have a golden ear or even close, I do know what sounds good to me but I do not know if what I like is really how it is supposed to sound (aka flat response). I have built the nano neos so I can voice my project off the nanos. I will use Jeff Bagby's software and work off the speaker building bible.
Here is what I have done so far:
I SPL traced the info off of PE's website for the Dayton nd105-4 and the nd20fa-6 (the two drivers used in the nano neos/ntn's). I used this information to enter into response modeler and create simulated in box measurements.
Here is my theory: The Nano's are a proven design and the accuracy of simulated measurements are somewhat questionable, but that is what I have. If I model the nano neos and then model the wwtww I can just do my best to match the curves, right??
The box will be 7"w x 11"d x 50"t this high to get the tweeters to ear level.. (internal airspace 41") just a snidge over 1.1 cu ft with a 3 inch port tuned to 39 hz 1/3 of the way up the airspace box area. This will be a 2.5 way with the outer woofers crossed over to provide baffle step.
So the meat and potatos:
I have attached screenshots of MY simulated version of the nano neos (with the newest crossover off of Chris's album, for comparison to my version of wwtww.
I modeled crossover parts, and I think I am going to start with this:
Tweet: 4.3 uf cap with .25 mh coil (12 db) padded to taste
Inside woofers: .8 mh coil with 3.3 uf cap (12db) zobel: 10 uf cap and 10ohm res
Outside woofs: 2.0 mh coil (6db)
Now this is the crossover for the nano neos used on the inside woofers with the same coil that is on the woofers for the ntn version.
I have attached MY simulated version of the nano neos (1st attachment) and the wwtww is the other two attachments.
Now it was harder to curve fit the two than I thought it would be...are these two curves pretty close to sound similar?
Anyone have any comments?? Does this look like a good start?
Fire away with anything that you may notice- I probably need more help than I realize.....
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