What speaker cable made a major difference in the sound quality of your speakers??


I am curious what speaker cables made a big "jaw dropping difference" in the sound quality of your current speakers.  What most impressed you about the difference;  that is, overall musicality, tighter, deeper bass, midrange clarity and soundstage depth, etc.etc. 

Keep the price of the speaker cables chosen or auditioned at  between $800- $1000 or  from  $1000-$1500. Was the cable bought new or used??

  Thank you,   SJ

sunnyjim
Biggest difference and improvement came with my own DIY pure silver cables -- less than $300 -- no terminations.
Klee Acoustics replaced my Kimber Kable Monocle XL’s...By comparison... the Kimbers sounded broke... ie; closed in,lacking in image,sound-staging,resolution, and tone. Of course,this is with my ears and my equipment. ymmv
@sabai - where did you source your silver cable? I've silver interconnects and connecters.. I'd like to try SCs as well.
toddverrone,

I bought 9999 pure silver wire on Ebay. I use no insulation or connectors. I also made one PC using 9999 pure silver wire -- with insulation and connectors.

Are your interconnects pure silver? With insulation? What connectors are you using?
Synergistic Reseach Atmosphere Level 4 SC's.  The interesting thing is that the SC's I had before (Acoustic Zen Double Barrel Shotgun) were great, but the difference across all parameters when I changed over to the Level 4's was immediate and transformational.  I love the additional deep inner detail, transient speed, beautiful true high's without compromising warmth and ambience, lush palpable mids (including an incredible realism to the human voice), exacting and impactful bass and a sound stage that is deep and wide.  I have heard the Atmoshere Level 2's and they have the same incredilbe qualities for less, but I found going up in price gave me the justiable difference.  I could not be happier.