Burn in period

burn in time depends more on the dielectric than the conductor material. Teflon takes a long time. If you don‘t believe it take a set of interconnects with 500-1000 hrs on them and A/B them against a fresh set..

Some manufacturers will give you expected timeframes. No idea as to their accuracy.‘

ignore the armchair theorists

@pesky_wabbit 

+1. 
 

Measuring… forget it, your ears can clearly distinguish the difference. You would have to put together a pretty significant scientific study to isolate the parameters an measure them. But listening is simple and obvious.