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Tweakers' Asylum Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ. |
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Tweakers' Asylum Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ. |
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In Reply to: RE: DIY Detail Magnifier posted by pixelphoto on April 11, 2015 at 22:50:27:
Thanks for that URL. If the values of R and C used in the Detail Magnifier or the other commercial devices under discussion are indeed 10 ohms and .01uF or values in those ranges, e.g., 100 ohms and .047uF as mentioned, then this is probably not a true Zobel network. Because a Zobel network has to operate in the audio frequency range in order to "shape" the impedance match between speaker and amplifier, which is the definition of a Zobel network as I know it. The values for C are probably too low to operate in the audio range. What these are is more like the original Walker HDL, designed to remove RF. And I agree with you that they DO work to improve many aspects of the sound. This thread made me realize that after making some changes to my speaker crossover, I had forgotten to re-install my home-made HDLs. Now I can't find them and will probably have to make another pair.
One thing, though, I cannot imagine how the effect of either a true Zobel network or an HDL RFI filter would remain in effect after removing them from the speaker terminals (or from the amplifier output terminals, in the case of a Zobel). That's a bit of fantasy, IMO.
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Follow Ups
- Semantics - Lew 08:12:27 04/17/15 (0)
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