If you have changed the balance of your system, you can try to compensate by doing simple things, like experimenting with speaker or listening chair placement, minor acoustic treatment, like putting tapestries on the walls or using an area rug on the floor (things that may not cost much or unduly disrupt your life). Doing more to compensate, like buying different cables is a gamble because it may not work. I hope it is something like changing the toe-in of the speakers that will do the trick.
sometimes just getting familiar with the new sound will also change your mind, so be patient and go slow with the changes.
I can understand your not wanting to fully disclose the products involved, but perhaps you can say what were the components that you liked before the change.

