Phd,
A good system design should require very little break in...any design that drifts significantly over time is likely to require regular maintenance or calibration...something a good designer will try to avoid.
Fortunately regular copper speaker wire driven with normal AC audio signals and within its design tolerances is so extremely stable with time that it should far outlast everything else with no drift in properties that would affect the sound....this means that a break in is simply not required for your regular run of the mill copper speaker wire. (only a cable made from materials that were not stable over time/electrical use could conceivably require a break in period, but this would be a poorly designed cable in the first place)
A good system design should require very little break in...any design that drifts significantly over time is likely to require regular maintenance or calibration...something a good designer will try to avoid.
Fortunately regular copper speaker wire driven with normal AC audio signals and within its design tolerances is so extremely stable with time that it should far outlast everything else with no drift in properties that would affect the sound....this means that a break in is simply not required for your regular run of the mill copper speaker wire. (only a cable made from materials that were not stable over time/electrical use could conceivably require a break in period, but this would be a poorly designed cable in the first place)