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In Reply to: RE: 1st order crossover and horns? posted by KanedaK on April 20, 2023 at 21:35:22
Do you have a way to measure the impedance's of the upper and lower speaker?
That with response measurements (both saved as a text file) will let you computer model the crossover and one can usually nail it on the first or second try.
LSPcad is a very handy program I have use a lot for this task but there are others i am less familiar with
Follow Ups:
Well, no, I don't (what kind of the device do I need?)
BUT I do have a swamping (shunt) resistor in // with the Crites 3636 autoformer that attenuates the midrange.
I used to have a 10ohms resistor there, then (as I was attenuating -5dB) a friend suggested I tried 12Ohms instead, which I did, but since then I switched to only -3dB of attenuation which would normally asks for a 16Ohms resistor.I don't know if that resistor alone could be the cause of such a deviation...
On the other hand, I kinda thought that having a swamping resistor in // with the autoformer would have the network see a much flatter 8Ohms impedance throughout (?) (assuming I would have the correct value resistor which isn't the case here ^^)So maybe I first try that, of course, I should first buy some 16Ohms resistors and see what happens...
Edits: 04/21/23
Since you were able to measure the midrange response with REW, why don't you first measure the tweeter response before you start playing around with crossover components? You need to know the baseline performance.
Using a "universal" crossover with drivers it wasn't specifically designed for is very likely to give results that are different from the nominal ALK values.
Yeah, I'm going tp measure everything of course but, what got me interested in the midrange to tweeter crossover behavior is that, when I measured the full bandwidth with the tweeter in the wrong polarity, the resulting gap was way too wide. There is clearly some overlap happening there.
The overall response is good, and it sounds good too, but yeah there is clearly room for improvement.
I use XSim, which works nicely. But you need the FRD and ZMA files, which requires testing gear if it's not published.
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