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Multi-Way Conventional loudspeakers with crossovers

Crossover exercise !
Crossover exercise !
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Old Yesterday, 05:38 PM   #1
Aatto is offline Aatto  United States
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Location: Austin
Default Crossover exercise !

So just for sake of practicing, I decided to design a 4 way crossover from scratch. Drivers are :

Tweeter : Dayton Audio RST28F-4
Mid : ScanSpeak 10F/8414G10
Woofer : SBA SB23NRXS45-8
LF : Dayton Audio RSS265HF-8

the only reason i chose these is because i had the frd/zma for them !
it is a simple 1st order crossover crossed at 100/700/7000Hz.

So tell me how i did, why good, why bad and what would you change ?

Attached Images
File Type: jpg 4 Ways - 02 XO.jpg (48.1 KB, 92 views)
File Type: jpg 4 Ways - 02 Graph.jpg (86.1 KB, 91 views)
File Type: jpg 4 Ways - 02 GD.jpg (72.1 KB, 91 views)
File Type: jpg 4 Ways - 02 SR.jpg (25.9 KB, 89 views)
File Type: jpg 4 Ways - 02 Impedance.jpg (61.1 KB, 88 views)
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Old Yesterday, 09:11 PM   #2
PeteMcK is offline PeteMcK
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Join Date: Feb 2002
Location: Western Sydney
the SB23NRXS45-8 will need at least a 2nd order HP filter, look at the breakup zone on its FR graph;
you haven't said whether you took baffle step into account...
not much point in zobelling the tweeter, if you're using a flat baffle I'd go 2nd order for the tweeter
Impedance varies with frequency, use impedance plots of your drivers and make crossover calculations using the actual impedance of the driver at the crossover frequency
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Old Yesterday, 11:03 PM   #3
system7 is offline system7  United Kingdom
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Join Date: Aug 2008
Location: Portsmouth UK
You are wasting your time with Mickey Mouse circuits.

Try designing something good.

Replicate this Troels Gravesen 3 way with the SB bass, the scan mid and the tweeter. Try to get the same slopes.

If you are struggling for a starting place, try this configuration for some typical component values back from when he gave it away:

You might end up with something you fancy building. I enjoy trying Troels circuits with different drivers. It's the idea that matters.
Best Regards from Steve in Portsmouth, UK.
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