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Active crossover
Active crossover
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Old 3rd April 2020, 09:14 AM   #1
Jonas22 is offline Jonas22  Lithuania
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Default Active crossover

Hello,

I wish to built 2-way active crossover with 1300 Hz cutoff frequency.
I have theorical schematics, please see Figure 5 and 6 in link bellow:
AM Active Crossovers

But I don't know how to calculate all components nominals.
Maybe someone know equations or maybe can calculate these values?


Best regards,
Tadas
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Old 4th April 2020, 01:42 AM   #2
PRR is offline PRR  United States
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Active crossover
ESP Projects Pages - DIY Audio and Electronics
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Old 4th April 2020, 03:00 AM   #3
elukacs is offline elukacs  Hungary
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If you are happy with different topology then here you can find a decent paper and solution from TI.
https://www.ti.com/tool/TIPD134
Paper also shows how you can use TI filter design tool to change xover frequency.
In the lower section of the page they also included a TINA sym model if you want to check the changed circuit.

Last edited by elukacs; 4th April 2020 at 03:11 AM.
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Old 4th April 2020, 03:35 AM   #4
keilau is offline keilau  United States
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linkwitzlab_activefilters.pdf
Linkwitz_Riley_Crossovers_Primer-Rane.pdf
I hope that you will find these article from the former Linkwitz Lab helpful.

I will also strongly encourage you to consider a ready built box from Weilliang Audio. You can specify the crossover frequency when you order. This one is head and shoulder above other Chinese offers. I replaced the 5532 IC with LME49720 genuine product. The result is excellent.
WEILIANG AUDIO Linkwitz Riley electronic frequency divider two frequency division preamplifier custom crossover point|breeze audio|electronic crossover|crossover electronics - AliExpress

Last edited by keilau; 4th April 2020 at 03:40 AM.
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Old 4th April 2020, 08:46 PM   #5
Jonas22 is offline Jonas22  Lithuania
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Thanks guys, but I want to try gyrators based schematic. I only need equations to calculate preferred values.
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Old 4th April 2020, 09:01 PM   #6
planet10 is offline planet10  Canada
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Active crossover
How steep do you need the XO? If 1st order you might get away with a PLLXO, which is both cheap and adds no "electronic haze” (but at the expense of versatility). What drivers are you using?

And do note that a basic active XO does not usually deal with specific driver issues that a passive often solves.
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Old 4th April 2020, 09:09 PM   #7
picowallspeaker is offline picowallspeaker  Italy
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For your purpose, look at TDA 2320A datasheet (> applications)
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