Speaker Wire question

I was given a free pair of Tara Lab speaker wires Model Prism Klara.
I tried these on my Klipsch Heresy 1 speakers and to my surprise, they sounded as good as my Audioquest Gibraltar speaker wires.
Even though the Tara Lab wires are entry level, they sound so good. Why is that?
Also these wires were made in China in 1998 and have been discontinued.
Any opinions ?