I have tried both. Zen is a bit sterile and Cardas is bloated in my system. I currently use Pure Note which is superior to both brands IMO. Their site is: www.purenote.com
-Martin Logan ReQuests.
-Krell FPB 600.
-Krell KRC/Reference Phono.
-Sony SCD-1.
-Old VPI table, SME3009 arm, and various cartridges.
-All interconnects, Pure Note Epsilon Reference.
-Current speaker cables are Silversmith, soon to be Pure Note Epsilon Reference (perhaps).
-Martin Logan ReQuests.
-Krell FPB 600.
-Krell KRC/Reference Phono.
-Sony SCD-1.
-Old VPI table, SME3009 arm, and various cartridges.
-All interconnects, Pure Note Epsilon Reference.
-Current speaker cables are Silversmith, soon to be Pure Note Epsilon Reference (perhaps).