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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 ?

Thanks
A.
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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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
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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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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.
SBAcoustics-3WC

If you are struggling for a starting place, try this configuration for some typical component values back from when he gave it away:
SEAS-3-Way-Classic

You might end up with something you fancy building. I enjoy trying Troels circuits with different drivers. It's the idea that matters.
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