Thank you alll for suggestions .
Mogambi 15 awg cost 100 $ and 12 awg cost 145 $ . Alternative , is furutech fs 301 14 awg which w/o biwiring will cost the same . I will check on inexpensive but reliable 12 awg options
will try to position speakers better but wife not ok . . Will let them play out and see.
@2cents these b & w 706 s2 are brand new not pre owned
You are trying to solve a problem that doesn't exist while ignoring very real one. Some people will tell you cables make no difference, other will tell you should spend 10% of your budget on the best cables you can afford. The truth is probably somewhere between those points. If you were to write a list in order of effectiveness, all the things that can improve or destroy the sound of a hifi, the resonance of the room, and the positioning of the speakers will be towards the top of the list. The difference between an OK and a high end cable will be towards the bottom of the list.
Let me use a couple of analogies:
Think of a speaker cable as s pipe and the current as water flowing in that pipe. If you need a lot of water to flow through that pipe a wider wipe will make it easier. A really small pipe may burst under the pressure. A pipe that is a little too small will mot be as effective, but will do the job. A supper wide pipe wider than is needed will have no extra benefit. That's gauge.
The difference between cheap wire, good copper wire is as follows: Cheap random metal is less conductive. this is like having rubble in the pipe interrupting the flow of water. A copper wire is a nice clean smooth pipe where the water can flow freely. Your high end cables are the equivalent of polishing the inside of the pipe to make it super smooth. It may make a difference, but it will be so small you won't even notice.
The second analogy. This on the sound as a rubber ball. If you throw thar ball in a room full of hard surfaces it will bounce all over the place. If you throw it at a supper sold cushion it won't bounce. Your aim is to reduce how much it bounces, therefor, you want more softer absorbent surface and less hard resonating ones.
As for the distance to the rear, if you are too close to the wall, you are doing to have big base frequencies bouncing back at you out of time with what is coming out of the front of the box!
In short, worry about the things that will make a big difference such as positioning before you start spending big money on small tweaks.