is this the best cable geometry for preamp to power amplifier?

is this the best cable geometry for preamp to power amplifier?
 

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Probably not, looks something like a guitar cable designed to be flexible and have low triboelectric noise when flexed.

Between a preamp and a power amp usually would benefit from a lower impedance and more fully shielded outside ground.

Another consideration might be as to the expected length of the cable and the local EMI/RFI environment.
 
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For a line level RCA analog single-ended, unbalanced interconnect:
a coax with a heavy braised shield is the best choice.
* * * * * * * * * * * *
But realistically for a short interconnect (say 10 feet/3 meter or less), any shielded cable will be OK.
 
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Well, you can always imagine some exceptional situation, say within 100 feet from a Broadcast transmitter antenna while having a high plate impedance as source, of course. but on today´s average situation: low source impedance and normal electromagnetic fields, practically any shielded cable will do.
 
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