Interconnect cable upgrade disapointment

I have recently upgraded my Audioquest Topaz XLR interconnects from my amp to preamp and from my preamp to my CD player with Audioquest Cobra XLRs. I was expecting to hear a substantial difference based on the significant price difference between these cables but I hardly noticed any difference at all. If I need to break in the interconnects to have an apples to apples comparison I would appreciate tips on how to do so. Currently, I have a CD playing on repeat. How long will the break in period take and can I expect to observe a substantial difference? Your help would be greatly appreciated.