It could very well be the way your room interacts with the speakers is causing your excess bass (if I read that correctly) and anything you do to the cables will be for naught.
I have monitors that "only" reach down to the low 40s but I can measure response down to the low 30s and have more than enough bass to meet my needs.
Using a sub can be advantageous since you can position it just about anywhere and adjust the output to a lower setting, which would alleviate some, if now all, of your problems. Others here know more than I so they'll chime in soon enough. :-)
All the best,
Nonoise
I have monitors that "only" reach down to the low 40s but I can measure response down to the low 30s and have more than enough bass to meet my needs.
Using a sub can be advantageous since you can position it just about anywhere and adjust the output to a lower setting, which would alleviate some, if now all, of your problems. Others here know more than I so they'll chime in soon enough. :-)
All the best,
Nonoise