Nobody with 40 feet of speaker wire needs better wire. What they need is better speaker placement. Or component placement. Or both.
When you get things situated to where they should be you will need 8 ft per side, if that. At that point then a good $500 speaker cable will have tremendous impact. Right now though it would be throwing money down the toilet.
When you get things situated to where they should be you will need 8 ft per side, if that. At that point then a good $500 speaker cable will have tremendous impact. Right now though it would be throwing money down the toilet.