Try this. Find a huge orange 100 foot extension cord cable
commanly used outside to run electric lawn mowers. Cut it up as I did. I had first shotgun it up like the old 750 MIT Music house.It sounded really nice,But as I kept adding more cables in parellel every parameter of the sound improved on my system..Now I have 5 16 guage cables
per speaker and the thing is huge,bulky and almost to heavy to prop up on my speaker end. I'm using some 12 guage Radio Shack Banana Plugs that has helped out a bunch
in terminating it. ON MY SYSTEM it is a sure winner as a great speaker cable buster ad only cost maybe 15 to 24 dollars for the whole cable run. So your not out much doing this diy. It is very time consuming, But u may be surprised at the results.
Or the other suggestion would be to go to Bruce Brissons
DIY Page and purchase their speaker giant killer kit
for $550.00 with one new network and they sale options to buy 2 other networks for them for I think an additional $275.00 per network. Well I hope this gives u something to chew on.
Don C.
Happy Listening