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General Asylum General audio topics that don't fit into specific categories. |
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General Asylum General audio topics that don't fit into specific categories. |
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In Reply to: hmmm. posted by jneutron on February 14, 2007 at 06:52:06:
While the nominal impedance of the cable that you mentioned is pretty reasonable, the capacitance per foot is too low / inductance per foot is too high. Juggling these figures further in the direction that i have mentioned would provide not only a lower nominal impedance, but also greater rejection to RFI and EMI. Having said that, the cable that you described would be a good starting point and should provide benefits as compared to a generic power cord.I'm glad that you made the comment that you did about star grounding being far less than adequate, as i've publicly battled with several different manufactuers about this very subject. Several of them post here and manufacture products that are highly respected on this and other audio forums.
We are also basically on the same page as to the differences between RFI and EMI, although RFI may be considered "local" if within very close proximity to a transmitter. In such cases, one might be experiencing "front end overload" due to the concentrated EM field. This can occur by itself or in addition to AC based noise due to RFI entering the "long wire antenna" feeding the mains.
Obviously, there are a lot of various factors to consider in most every aspect of this discussion, hence my reluctance to present anything as being "concrete". On top of that, i'm not going to hand anyone a bone when i normally get paid for the research that goes into my design / consultation work ( which is non-audio based ). Sean
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