These are the FRD and ZMA trace files I made for the tweeter. Along with the 0,15,30 diffraction modelled FRD's.
Also on the driver tab of Vituix - I have 'Minimum Phase' selected.
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i fiddled with the components and I think this looks right, but i'm posting my diffraction models and other info here...
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also, not sure what's up, but i re-ran the diffractions to match Dezzar and here is my mirrored crossover components... with a nasty dip in the middle...???
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Originally posted by DeZZar View PostApologies I just noticed I had 'open baffle' ticked at some point running the diffraction model. I re-ran the models to be sure with the following updated result....
EDIT: another item i noticed is that your tweeter diffraction doesn't list the 11.95 properly for the Sd:
https://www.parts-express.com/Peerle...ableshopping=F
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Originally posted by rpb View PostSo.....What is your intended use for these speakers? What are your primary performance concerns?
That said, these two are going to be the rears in my basement home theater buildout. My fronts and center are going to be 7” DA references with morel 378’s. I haven’t started simulating those yet and I’m looking into MTM or MMT layouts.
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I have to say I'm pretty surprised. I wouldn't have even considered a 10" two way (and probably still wont) but if everything here translates from the theoretical to reality its a bit of a shock. These things could be +- 1.6db f3 to 20K! That's only one dimension of the sound of course, but still not something I would have expected.
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Here is an update showing "purchasable" values.
You will want to keep the DCR (resistance) on the inductors to a minimum. This is modelled with:
L1: 0.47mH 15AWG 0.19 Ω
L2: 2.2mH 15AWG 0.473 Ω
L3: 0.75mH 15AWG 0.26 Ω
(all available in Jantzen Air-Core)
I recommend the Mills or Superes for the resistors. In terms of caps - spend as much as you like on the tweeter - I recommend just the Jantzen Standard Z-Cap here - you can go more if you like. On the woofer network any of the MPC caps are fine. I tend towards the Cross Caps myself.
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Apologies I just noticed I had 'open baffle' ticked at some point running the diffraction model. I re-ran the models to be sure with the following updated result.
Drivers have good phase alignment - this is the 'reverse null' when inverting the tweeter
And just so we are all on the same page, this is the diffraction model I used for the drivers:
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Totally agree. Often a cheaper woofer/tweeter results in a more complex and expensive crossover particularly when stretching the limits with a combo like this one. In my experience simple crossovers come from well behaved drivers that match up comfortably on a good baffle design.
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So.....What is your intended use for these speakers? What are your primary performance concerns?
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Originally posted by Chris Roemer View Post3 "notes":
1st - I don't model BSC (I just show it to you in my FR - it's "generic") or diffraction ('cause I'm lazy and don't know YOUR baffle layout).
2nd - Diffraction (which you can SEE in "Edge" - and apparently "model" in VCad) is worst when a tweeter is exactly the same distance from the 3 (closest) adjacent baffle edges...
If you DID trace the woofer plot - I'd like to see what you got (errors can be made setting tracing limits - or adjusting the scale incorrectly)...
Good info on the tweeter location and diffraction. I was messing with that on the diffraction tab of Vituix... very cool to see it change. now give me the reason why my Dad's EPI 120 B's have an offset tweeter... who knew...
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Originally posted by dcibel View Postzinger084 Recommendation for accurate design data in VituixCAD is always to use real measured data. However, to understand the tools and response processing, I've created a document that describes how to process manufacturer data with VituixCAD tools that roughly follows a similar process that would be completed with real measurements. It should be helpful to you to get started with VituixCAD with something that at least resembles reality.
this program is loaded with features, and I've been watching as many videos as possible to learn as quickly as possible.
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