This crossover scheme with a capacitor is quite alright. It already gives some design flexibility and, in my opinion, is such a minimum for a sensibly designed series crossover. Of course, you can't do it properly without measuring the speakers and simulating the crossover. For simulation I recommend VituxCAD.I never noticed the the original post had no cap. This is the one from 2003 that I started with.
View attachment 1300338
As an exercise I used this XO design on a simulation I did for a new member. This was just a PoC using downloaded Dayton factory data, I was surprised at the quality of the results after adjusting the values. I have no idea how it would sound, I'm guessing both drivers are pushed into distortion, but the frequency response looks nice. It was in the recent thread.
https://www.diyaudio.com/community/threads/first-3-way-crossover.412155/page-3#post-7673003
https://www.diyaudio.com/community/threads/first-3-way-crossover.412155/page-3#post-7673003
This thread is relevant to the current discussion:
https://www.diyaudio.com/community/...over-vs-parallel-for-subs-open-baffle.404680/
https://www.diyaudio.com/community/...over-vs-parallel-for-subs-open-baffle.404680/
There is, C1 at 27uFI think you need a cap in series with the tweeter too, try 15uF.
@rabbitz This was just an exercise to play with a serial XO, I have no plans of building the design.
Got it, the change pushed the XO point up to 3500. I did some more fooling around with serial XO circuits and I think they are of very limited use. The woofer and tweeter need to have the same impedance for any chance of success. Maybe using a cone tweeter that can play very low or a small full range for the high frequency might work. I even tried modeling a second order serial with some of my working designs that use modern drivers and all I could end up with was a hot mess. There seems to be to much interaction between the low pass and high pass circuits. I will stick to parallel XO circuits.
Well, there is that flexibility, it's just a different set of compromises. Besides, series does have better adaptability to different impedances for those times when redesigning is not convenient.as there is not the flexibility of a parallel crossover.
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