The best speaker cables you’ve had

Analysis Plus 9AWG single minimum. Hard to DIY on this one. Copper is all you need... Double 9AWG or 8AWG even better. I tried "listening" to these cables and like others here I heard nothing................. untill I hooked up the speakers! Have Fun!

So many different opinions!  I personally love Shunyata Alpha v2's.  I went from Cardas Golden Cross to Audience Au24 to MIT Shotgun 3.3 to Morrow Audio SP7 and finally to the Shunyata's.  I liked every single pair, honestly, but as my system upgraded and my wallet, these do it for me, although I do wonder how the knockoff Nordost Odin 2's sound . . . I have hear very positive reports on them!

Back when my ears were "young".  The best I heard was a generic "Orange" TrueValue Hardware 12g extension cord with the ends lopped off and terminated into spade connectors with McIntosh tube amps and/or Technics SA-1000 into Inifinty RS-IIs. Granted, back then it was all Lamp-Cord or Bell-Wire anyways.   

In my 50's now, and although I can still hear up to 15K, I doubt changing cables these days are worth the time/effort/cost.  LOL.  I stick to BlueJeans and Mogami these days and am totally happy.

I've tried many cables, including some costly ones, but still using the old Zu Audio wire: Libtec speaker cable and Varial interconnect. There is something about these long discontinued wire that makes it a keeper. Perfect mix of neutrality, transparency and musicality.

Also using a Kondo silver interconnect (which is far from neutral) for my old modded RA Opus 21, but they are just a match made in heaven. 

Also love the old Cardas Golden Power cables and still using it in my system as well as Shunyata Python.  

i’ve been using monster cable for almost 40 years. i’ve heard them in stores next to high end cables and cannot detect a difference.

i have noticed an improvement with shielded interconnects between components and preamp and preamp to amp.

i've also noticed a difference between terminations between amp amp speakers.  gold spade lugs soldered to the cables appear to be the best.