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Location:
Lost in the K hole
Registered:
May 2002
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Capacitors in audio circuits... ??? HELP
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Tue, 12 October 2004 13:54
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question!
i know that a cap in series with a speaker acts as a high pass filter... but how?
and what exactly would a cap in parallel with a speaker do?
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I supported Toymods
Banned User
Location:
Brisbane
Registered:
May 2002
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Location:
Perth
Registered:
April 2003
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Re: Capacitors in audio circuits... ??? HELP
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Tue, 12 October 2004 14:39
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A capacitor would be a "short" at high frequency.
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Location:
Brisbane
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May 2002
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Re: Capacitors in audio circuits... ??? HELP
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Tue, 12 October 2004 23:47
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| ed_ma61 wrote on Tue, 12 October 2004 23:54 |
question!
i know that a cap in series with a speaker acts as a high pass filter... but how?
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it's the property of cap's, at DC voltage a cap is open circuit, at high frequency's a cap just acts as a short circuit.
http://en.wikipedia.org/wiki/Capacitor#Physics_of_ the_capacitor
and I should know the answer to your other question, but I don't 
Cheers
Wilbo
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I supported Toymods
Location:
Perth
Registered:
May 2002
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Re: Capacitors in audio circuits... ??? HELP
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Wed, 13 October 2004 01:12
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Haha, look where EE has got you 
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Location:
Lost in the K hole
Registered:
May 2002
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Re: Capacitors in audio circuits... ??? HELP
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Wed, 13 October 2004 02:13
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yeah, i kinda figured out how the cap works in series with the speaker... just nutted it out based on what i know about caps...
but WTF happens in parallel???
yikes!
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Location:
Lost in the K hole
Registered:
May 2002
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Re: Capacitors in audio circuits... ??? HELP
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Wed, 13 October 2004 02:25
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ahh, got it - it makes a low pass filter!!
at low freq, the the parallel circuit is cloased, driving the low freq signal through the speaker. at higher freq, the cap facilitates current through the parallel circuit, and bypasses the speaker 
thanks y'all
ed
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