[BC] Audio Cable

[Cowboy]

On Thursday 03 January 2008 01:01 pm, Tom wrote:

>  > High impedance inputs allow for greater crosstalk and
>  > ingress of foreign signals. This would ESPECIALLY be
>  > true of left and right channels being routed through a
>  > common connector. Disbelieve this? Remember old
>  > fashioned sinks with separate hot and cold water faucets?
>  > Today with a common spigot we can have any temperature
>  > of water from the cold to the hot. Read:Mixed signals!
>  >   
>  Poor analogy - at the sink, you WANT the mixed "signals" - you're 
>  DELIBERATELY summing them.  L+R!  Y-adapter!

 Exactly !


>  > We must also
>  > consider the connector assemblies. The suggestion of using a
>  > marker is Ludacris. This can adversely impact its shielding
>  > properties and capacitance, thus affecting the audio.
>  >   
>  I've never seen this in real-world situations, at least not as a 
>  measurable effect on the audio - again, we're talking 100% shields - 
>  XLR-type - connectors or DIN plugs with metal shells that bond to the 
>  drain (or the chassis).  You might as well add in the capacitances 
>  caused by the residual oils left on the shell by your fingers; 

 What ? You don't clean the connectors after touching them ?
 I hope at least you only handle them with kid gloves ?

>  Semi sidebar - the only time I've had real problems with unequal lines - 
>  SIGNIFICANT problems, that is - is in dealing with a certain telco - 
>  four stereo pairs, no two lines of which were even in the same CABLE.  I 
>  could NOT find one pair that would maintain stereo separation... until I 
>  broke the stereo linkages at the transmitter, so I could find two pairs 
>  in the same cable.  Which proved impossible; they were routed through 
>  different cables between the studio to the CO, and different between the 
>  COs, then different again for the last mile connection.  Example; pair 1 
>  might be in an aerial cable between the studio and the CO, with pair 2 
>  underground (repeat using second and third aerials and undergrounds) At 
>  the CO, pair 1 would switch to an underground cable, while pair 2 might 
>  be underground - in a different cable.  At the midpoint, the 
>  relationships changed again, and again at the final CO.  Hairiest proof 
>  I ever did...

 Kinda illustrates the point, don't you agree ?

-- 
Cowboy