Speaker cabels for dark sounding speakers?


Hej

My speakers are considered to be dark sounding and it has been OK with me until I replaced my easy chair with a small couch. Now the sound has turned a little too dark/muffled/dead. So I'm thinking maybe if I replaced my speaker cables with some other. Yes, I know it's a long shot, especially when my current cables are Kimber 8TC. But what do you say? Smaller carpet? Just don't say bring back the easy chair or buy new speakers :)
simna
The speakers are Tannoy Eaton and they are dark sounding or you might called them a little rolled off.
From my experience all speaker cables "destroys" the sound. More or less. For example, some makes the sound less bright than it should be. Those are not the ones I'm looking for.
Hope you understand my bad English enough to see what I'm trying to say.

Post removed 
@tvad
Actually the sofa is the "big brother" to the easy chair. Just an extra seat to my right, so to speak.
Interesting?
Post removed 
@tvad 
No matter what you think or how your furniture are made, these are exactly the same except for that one has one seat and the other has two. I thought it was common knowledge that if you put more furniture or bigger furniture in a room it will affect the sound in the room.
I can add that when I switched from Supra Ply cables to Kimber 8TC, the sound actually became more open and brighter.
Thank you for wishing me good luck in my "cable quest".