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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


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,
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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.
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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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.
Stay safe. Stay home. Respect the 2m bubble.
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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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