Power cord length and monoblocks

...only approximately... as long as difference in lengths less than 20m...

It's unlikely that the wires behind the wall are of equal length either, so I wouldn't consider a few feet pc cord length difference critical.

Power-wise, it' not a concern. A 10 ga wire will lose half a volt for every 10 feet at 20 amps, and since (good) power supplies can regulate within power delivery tolerances (114 to 126 volts), you will need a difference of about 150 feet to make an effect in this example.

Sonically, who knows. I'm sure some will say they have experienced or perceived a difference. And some will say they have not.

Even with a cord that uses specific geometry and tuning, i would not consider this critical. What i would consider critical is the difference in ground potential when tying into two or more different circuits / outlets. Many people have all of their line level gear on one outlet and each monoblock on their own outlets. The potential for a ground loop increases with each additional circuit / outlet that is added to the system. Sean
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