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Old April 17th 04, 02:55 PM posted to uk.rec.audio
Wally
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Posts: 395
Default Preamp low pass filter

Jim Lesurf wrote:

Personally, for active filtering, I'd tend to prefer using a LPF, then
creating a HPF output by subtracting the LPF output from the input.
The result if you keep the levels matched is a LP and HP pair of
signals whose vector sum always equals the input. Thus the combined
result shows no phase errors due to the filtering.


That's a neat trick. (Maybe tri-amping isn't such a bad idea...)


For the actual filters I tend to lift the basic designs from the
Active Filter Cookbook by Don Lancaster.


taking notes


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Wally
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