Cable specs. Capacitance / resistance ???

P

PJ

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Pro Line microphone cables CPM # FM - technical data
This cable is equipped with these
NEUTRIK connectors. Cable used: CORDIAL CMK 222
Conductors: 2x28x0,10mm = 0,22 mm2
Shield: Spiral Wound Copper
Overall Diameter: 6,4 ± 0,2mm
Capacitance Cond./Cond.: approx. 70 pF/m
Cond. Resistance: < 85 Ohm/km Ohm/km

Fair Line microphone cables CFM # FM - technical data
This cable is equipped with these
NEUTRIK connectors. Cable used: CORDIAL CME 220
Conductors: 2x25x0,10mm = 0,2 mm2
Shield: Spiral Wound Copper
Overall Diameter: 5,8 ± 0,2mm
Capacitance Cond./Cond.: approx.200 pF/m
Cond. Resistance: < 100 Ohm/km Ohm/km

Yes. There I have specs of two different microphone cables. I know one is named Pro line and another just Fair line. But heck I don't understand a word of what these specs are trying to tell me.
Ok, maybe I understand a little, but could someone clarify what are CAPACITANCE Cond./Cond. and Cond. RESISTANCE ??
How much does this Fair line vs. Pro line affect the sound quality and in what kind of situations are smaller pF/m numbers better?
Thanks!
 

hargerst

Well-Known Member
Joined
Jan 28, 2001
Originally posted by PJ:
Yes. There I have specs of two different microphone cables. I know one is named Pro line and another just Fair line. But heck I don't understand a word of what these specs are trying to tell me.
Ok, maybe I understand a little, but could someone clarify what are CAPACITANCE Cond./Cond. and Cond. RESISTANCE ??
How much does this Fair line vs. Pro line affect the sound quality and in what kind of situations are smaller pF/m numbers better?
Thanks!The first part of the specs is what cable is used and the numbers are basically the thickness of the wires (conductors, or cond. for short).

When you have two pieces of metal seperated by an air gap, you have a capacitor, which can act like a tone control and roll off the high end of the signal, if the cable is long enough. 70 pf/m means the cable adds 70 picofarads across the signal leads for every meter (39") of cable length. Cond./cond. means the capacitance is between the two conductors. The smaller the number, the better the cable.

No wire is perfect; you lose a little bit of signal as the wire gets longer because the wire adds resistance (that's how wire-wound resistors are made). The 100 ohms/km means that in one kilometer of cable length, the cable will act like a 100 ohm resistor, in series with the mic output. It's measured from one end of the conductor to the other end. Again, the smaller the number, the better the cable.


Is that any clearer?
 
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