Copper and silver cables and bass response

Just changed out my Kimber KCAG silver cables and put my old Tara Temporal continuum cables in my system. Wow the bass was more powerful and deeper. What gives. Should I not use silver between my amp and pre amp? I read a while back that silver is best between other components. Is this more or less true? The KCAG's were more detailed. How good was the Tara Temporal continuum in their day? any opinions appreciated. mike