Your headphone system looks to be of good quality and should have plenty of resolution to hear a sound quality difference in cables, if one exists. If you don't hear a difference, either there is no difference, or you can't hear the difference (or your music source files are crap). Either way you should just return the cables for a refund.
Regarding your Teac/Chane system, I've never heard them. I know they get pretty good reviews, but both (combined) cost much less than the interconnect cable you purchased. Do you expect them to have enough resolution to hear the difference?
Regarding your Teac/Chane system, I've never heard them. I know they get pretty good reviews, but both (combined) cost much less than the interconnect cable you purchased. Do you expect them to have enough resolution to hear the difference?