I have used 4 and 15 feet of the same speaker cable and it did not make a difference in my system!!
Your short speaker cable experiences
I'm going to compare my present speaker cables with the shortest runs I can find -- perhaps as short as 2.5 feet from mono block to speaker.
I'm curious if anyone tried comparing their longer speaker cables against short runs of other ones and whether it made a difference or not.
What changed? Did it cause you to reposition things?
Happy to hear stories. No trolling about "wire is wire," please.