And yet there are DAC manufacturers who claim we can hear timing errors of 1 microsecond...
Speaker cables can make a difference, not always, depends on the amp and speakers they are betwixt. In my current lash up I have recently swapped between Chord Odyssey 2 and NVA speaker cables. The difference would be obvious to any random person I pulled in off the street.
I've also swapped speaker cables in other systems and heard no difference, despite huge differences in the price of the cables. I think it would be perfectly possible to live an entire audio life and not come across differences in speaker cables, it is the exception rather than the rule.
As for TQ Black being something special, for every person who says it is the best thing ever there is someone who says it didn't work in their set up. Cables are always horses for courses.
Current Lash Up:
TEAC VRDS 701T > Sony TAE1000ESD > Krell KSA50S > JM Labs Focal Electra 926.