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single supply subwoofer low pass filter design
single supply subwoofer low pass filter design
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Old 13th February 2018, 09:38 PM   #1
jhorapalok is offline jhorapalok  Bangladesh
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Default single supply subwoofer low pass filter design

I need a single supply subwoofer low pass filter design. Do any of you have any tested diagram? I like to feed the output to a 19W amp. Please help.
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Old 14th February 2018, 08:35 AM   #2
4real is offline 4real  Netherlands
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Google is your friend.. several things pop up quite easily, for instance this one: Subwoofer active low pass filter or this one: Single Supply Active Filter with Virtual Ground (using a virtual ground)
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Last edited by 4real; 14th February 2018 at 08:39 AM.
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Old 14th February 2018, 08:52 AM   #3
scottjoplin is offline scottjoplin  Wales
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Originally Posted by 4real View Post
Google is your friend
Is it though? Yet another basic question
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Old 14th February 2018, 10:33 AM   #4
4real is offline 4real  Netherlands
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Maybe? Would be great to know what you (jhorapalok) already found out and why you're asking for it? What kind of amp do you want to connect it to? Some more details would probably help.
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Old 14th February 2018, 11:26 AM   #5
motronix is offline motronix  Israel
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Default I prefer to use dc to dc converter

the "normal" dual supply Low Pass filter is better from all aspect
I prefer to use dc to dc converter to make dual +/-12V or 15V
this 2 types have also isolated Ground (input ground to output ground)

Single 12V DC to Dual 12V DC/2A Converter For Car audio design. isolated Ground | eBay

12V Isolated Ground PWM DC-DC Converter with Remote Power Turn On | eBay
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Old 15th February 2018, 09:33 PM   #6
jhorapalok is offline jhorapalok  Bangladesh
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Quote:
Originally Posted by 4real View Post
Maybe? Would be great to know what you (jhorapalok) already found out and why you're asking for it? What kind of amp do you want to connect it to? Some more details would probably help.
Thank you very much for taking the trouble to help me. I want to use the low pass filter to feed an amp that i built with LA4440 (bridge mode). The LA4440 amp runs by 12v single supply dc. That is why i wanted the single supply low pass filter so that i can use the same power supply to run the low pass filter and amp together.
Can i use a low pass filter that runs with dual volt power supply with conjunction with an amp that runs on single supply? (provided that i use two separate power source and separate single and dual volt power supply). Is that any problem?
I want your suggestion.
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Old 15th February 2018, 09:36 PM   #7
jhorapalok is offline jhorapalok  Bangladesh
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Originally Posted by scottjoplin View Post
Have you yourself never been on basic level? Probably not
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Old 15th February 2018, 09:45 PM   #8
scottjoplin is offline scottjoplin  Wales
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Of course I have/am. You misunderstand, it was not a dig at you. Did you read the thread? I'm interested by how and why it happens that basic questions are asked here and that they are becoming more common, and the comment of "Google is your friend" is often heard and I query it.
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Old 15th February 2018, 10:01 PM   #9
scottjoplin is offline scottjoplin  Wales
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Quote:
Originally Posted by jhorapalok View Post
Can i use a low pass filter that runs with dual volt power supply with conjunction with an amp that runs on single supply? (provided that i use two separate power source and separate single and dual volt power supply). Is that any problem?
You can do that, no problem
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Old 15th February 2018, 10:22 PM   #10
motronix is offline motronix  Israel
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Default variable low pass filter?

Quote:
Originally Posted by jhorapalok View Post
Thank you very much for taking the trouble to help me. I want to use the low pass filter to feed an amp that i built with LA4440 (bridge mode). The LA4440 amp runs by 12v single supply dc. That is why i wanted the single supply low pass filter so that i can use the same power supply to run the low pass filter and amp together.
Can i use a low pass filter that runs with dual volt power supply with conjunction with an amp that runs on single supply? (provided that i use two separate power source and separate single and dual volt power supply). Is that any problem?
I want your suggestion.
Let me ask you simple question.
do you need variable low pass filter or it's ok with you fixed low pass filter?
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