Who says cables don't make a difference?

My biggest mistake in hi-fi after 30+ years was to underestimate the importance of a speaker cable.  There were times when I was using $7,000 speakers with a cheap cable which, as I realised much later, was suffocating the excellent speakers.  
But I am a scrooge and I need 7 meter runs. Now I am using an inexpensive but good Zu Libtec and what a difference it makes.  

@georgemgraves So, on top of everything else you decided to go with an appeal to authority? 😀

Keep your 50 dollars cables.... But treat your room and prepare yourself for a big surprize....

The best improvement is not about cables but a dedicated controlled audio only room.... :)

EVERYTHING is equally important in my system.  I neglect NOTHING!

EVERYTHING is equally important in my system. I neglect NOTHING!

I understand you perfectly.... Same thing for me....

But we must decide if we will invest thousand of dollars for example in mechanical resonance controls?

Or in the house electrical grid controls?

Or in the acoustic of the room?

If our ressources are limited or scarce what will be the most important thing to invest in and in what proportion compared to the others problems?

I only think that cables comes last after these 3.....

:)

Thought I might open up a can of worms.
One interesting element is the prejudice factor.
When so called audiophiles say things like “smoke and mirrors”, “pseudoscience”, “my $50 cable sounds the same”, they are doing nothing more than professing their ignorance. They tend to be set in their attitude regardless of enormous objective proof. The true and educated audiophile well understands and knows just how complex and critical cables are to the ultimate performance of any system.It has been wisely pointed out that so many medium to very expensive cables are sold to many intelligent and attuned people. And many companies are very established and successful selling these cables.
Even if I were a very rich man, I would never buy an $80k speaker cable. No, but only because I am an experienced audiophile and know that I can get as good or better for much less. Would I use zip cord lamp wire for my speakers? Yes, for my garage system with an old receiver, etc. Surely, the nature and quality of you system is a critical factor.