Hmmmm, I just dont know enough yet to figure out which components in that schematic forms the sub filter. Can anyone please help and point them out?
I'll post the link to t-linespeakers.org again, as it could be a bit hard to see.
http://www.t-linespeakers.org/tech/filters/passiveHLxo.html
Here's a picture from that page:
A highpass dampens the frequencies below a specific frequency.
A lowpass dampens the frequencies above a specific frequency.
A 2nd order filter (falls by 12dB/octave), is basically just two first order filters that work together to make a steeper filter.
The active analog filters are basically the exact same thing as those passive line level filters, just insert two op-amps, one before and one after the filter to act as a buffer that ensures specific load conditions, ensures that it behaves in a predictable manner.
If you want to go fancy you can drop the op-amps and make the circuit yourself, but it's the same thing really.
Edit:
If you want to explain this to your daughter, I guess you can look at it like different types of fish. Some fish are bottom feeders, and consume the things that are on the floor of a lake, other fish may be surface feeders, and eat stuff close to the surface of the same lake. A highpass filter would be a bottom feeder, it consumes the stuff down low and let the other things just drift by. The lowpass filter consume stuff up high, and does not care about the things down low.
Edit2:
And then comes a shrimp, and they are ALL OVER THE PLACE! 😀 (activate tickling mode if the circumstances allow for it)
http://www.t-linespeakers.org/tech/filters/passiveHLxo.html
Here's a picture from that page:
A highpass dampens the frequencies below a specific frequency.
A lowpass dampens the frequencies above a specific frequency.
A 2nd order filter (falls by 12dB/octave), is basically just two first order filters that work together to make a steeper filter.
The active analog filters are basically the exact same thing as those passive line level filters, just insert two op-amps, one before and one after the filter to act as a buffer that ensures specific load conditions, ensures that it behaves in a predictable manner.
If you want to go fancy you can drop the op-amps and make the circuit yourself, but it's the same thing really.
Edit:
If you want to explain this to your daughter, I guess you can look at it like different types of fish. Some fish are bottom feeders, and consume the things that are on the floor of a lake, other fish may be surface feeders, and eat stuff close to the surface of the same lake. A highpass filter would be a bottom feeder, it consumes the stuff down low and let the other things just drift by. The lowpass filter consume stuff up high, and does not care about the things down low.
Edit2:
And then comes a shrimp, and they are ALL OVER THE PLACE! 😀 (activate tickling mode if the circumstances allow for it)
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Sorry man, lots happening with extreme weather events here. I will definitely teach her what I learn. She has her own collection of electronic parts like LEDs, buzzers, resistors, switches and such and a large work board that we made for a with low density fibre board. I hope she not only masters music but things that make music
From what I can understand from reading so far
Series caps and resistors to ground is high pass and series resistors and caps to ground is low pass and that is what I should be looking for in the schematic that I originally posted and then try to use a formula to work out the filter point? Can anyone please confirm if I am understanding that correctly, circled in red
From what I can understand from reading so far
Series caps and resistors to ground is high pass and series resistors and caps to ground is low pass and that is what I should be looking for in the schematic that I originally posted and then try to use a formula to work out the filter point? Can anyone please confirm if I am understanding that correctly, circled in red
Okay, I have not read a single page about op-amps circuits in my life, it was just briefly mentioned in school 20 years ago, so this could very well be wrong:
Thank you both. now starting to make sense of it enough to design to my requirements using electronic cad programs. The terms you two pointed out are helping to look up info
Thank you for the suggestions. I’ll try to see if I understand it enough now to change one to my specific needs in simulation
https://techtalk.parts-express.com/...over-board-for-the-electronically-adventerous
Hello
has anyone built this active 2.1 crossover can only schematic be shared.
warm regards
Andrew
Hello
has anyone built this active 2.1 crossover can only schematic be shared.
warm regards
Andrew