Audio cables/wires typically have some dominant characteristics, characteristics which they tend to impart to any system. Cardas tend to be warm… some very warm. Transparent and Straight Wire tend to be very transparent, imparting no net difference. Whether one sounds good on your system will depend on its components and your values. Matching cables to systems can be reliably recommended on this basis if the person knows the change they want. But Transparent cables will not warm up a cool system, and Cardas will not cool off a system.
Some cables have little impact on some or all sound characteristics, and the nuances that are changed can vary from system to system. Often the change might be fitting the values of the system to the user.
But in this case the effect of a well known cable was contrary to the known major characteristic.