Length of speaker cables


I just went from 2 channel amp to mono blocks. Is it important that I stop using 4 meter audio quest rocket 88 and downsize to 6 ft? Will there be an audible improvement?
steven0713
What about uneven length?

my amp is position at the side.
Will it be better to run a 5m on one side and 2m on the other?

Uneven length vs coiling of excess cable on the near side
Post removed 
Hopefully syeven0713 will let us know the results he hears once the cables arrive.
@lolroyy4,
Uneven speaker cables are generally considered a no-no, especially when using them at long runs. There might be issues with capacitance, as well as cable artifacts. Perhaps eric squires will chime in?

Bob