Cross posting from another list I lurk as the subject is of interest to me =
as well (but the original list isn't as likely to get as good of a reply as=
 here):

> This circuit is alleged to be a bandpass audio filter:
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>  Vin ---------||--------()()()()----------------- spkr, 8 Ohm
>      --|                                     |---
>        ///                                 ///
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>  Value for C: 33uF, 66uF   (Cut: 600Hz, 300Hz)
>  Value for L: 0.68mH, 1.5mH, 2.18mH  (Cut: 2.4Khz, 1KHz, 700Hz)
>  Rolloff -6Db/octave.
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> This is a common circuit in Yaesu's external speaker enclosures
> such as SP-5, SP-6, SP-767.
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> This is pretty goofy looking. I presume that the input in 8 Ohm.
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> The caps are intended to implement a highpass, obviously,
> the inductors a low pass.
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> How to analyze this to reproduce the mfg's assertions about the
> band limits and rolloff?
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> Digital filters are a lot simpler (I have nice books about them!).


Thanks in advance...

--=20
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