Burn in question

I bought a new pair of Signal Cable Analog Two interconnects to go from my preamp to power amp. I like Signal Cable. All my cabling is from them; a good cost/ quality ratio. They take about 50 hours to burn in. The sound is a bit lean now, only about three hours of time on them. Is the volume level critical to burn them in? If low level works then I can leave the system on continually for the duration of burn in.