HAVE CABLES EVER TAKEN YOUR SYSTEM FROM SOUNDING JUST OK TO SOUNDING GREAT? Experiences ?

In this hobby we're always attacking the weakest link. Often that's a component, but once the components have been upgraded the cables become worth a look. 

When i had a separate streamer and dac, the upgrade to a Tara RSC digital cable made a big difference. I had a good rca to my preamp.  Once I upgraded to a much better streamer/dac it became worthwhile to upgrade the rca interconnect to my preamp. It further improved the sound by a large margin. 

Same for preamp to  power amp, as well as speaker cables after other system upgrades.

We had a system at a show.  Changed the cables it was like night and day. 

Had larger than expected differences with three different sets of Vandersteens over the years. They seem sensitive to different speaker cables. 

My Cardas cables have improved the sound