I currently have anti-cables myself and agree that they are pretty good. Unfortunately, I would respectfully say that the Carver amp is your main issue. It is a reasonably dull/boring sounding amp that was made to emulate the sound of a tube amp and IMO did not succeed. I owned one for many years and used it primarily to drive my passive subs. You can try some inexpensive speaker cables as mentioned, but if you want to experience a significant difference, I suggest something like an Odyssey (w/extreme upgrade) amp or a McCormack DNA-1 as a starting point to drive your Apogees.