Buying advice


I have an Arcam FMJ A19 driving a pair of KEF LS50s. Maybe it’s a tad, just a smidge, bright. I don’t even want to use that word because I know it’s audiophile death. Maybe it’s better to say that I’d like to take a step—just a step—in the Harbeth direction. Import a rounder, smoother, warmer sound into the mix. And I’m thinking that speaker cables might help. 

I’m constrained by a very small bank account and grave limitations on room correction. 

There’s a pair of Morrow SP2 cables for sale on this site for $66. The price is right but are those going to take me where I want to go? If not, any suggestions? Please keep in mind the constraints noted above.

Crazy paranoia: The Morrows are 10 feet long as opposed to the 6 foot length of my current Q.E.D. cables. (From Q Accoustics.) That extra length can’t possibly affect the sound, can it?
Thank you.
paul6001
Wow. Tough talk. But well appreciated. Part of me thinks that bad cables might help. Cable makers and reviewers go on and on about transparency and clarity. I want less of those things. Maybe I’d be better off with lamp cord. 
$66… buy them. If you don’t like them sell them. Regardless of what you resell them for the ouch will not be significant.
YOUR ears are all that matter. Opinions will not answer your questions.
I do not like Morrows, the cheaper ones.  The ones that won awards I don't want to pay for.  I would suggest a Schitt Loki analog tone control as a cheap fix until your budget allows a better one.
A cheap tweak for too bright for your taste speakers is to double up the gauge of your current speaker cables.For example if your cables are 14 gauge,buy a roll of 13 or 14 speaker wire,cut it to length, strip the ends,insert in the holes of the binding posts,re tighten.It's not a cure all but it will take the edge off for the time being while you're researching other speaker brands and selling plasma to pay for them;-)
Arcam can sound somewhat "analytical".  Kef probably has a metal dome tweeter.  I myself have QED silver cables and they can sound bright.  So I can understand your system might have a bright sound to it.  

Honestly I am not sure a $60 pair of cable can fix that.

But if you really have to choose a different cable, I would go to the What HiFi review page and find an affordable pair of cables that can warm up the sound.  What HiFi has a lot of affordable cable reviews from across the pond.
https://www.whathifi.com/us/products/accessories/audio-interconnects-analogue