Have you checked with Wilson? Would it be easier (and more amenible to customization) to add an equalizer somewhere? It is possible that Wilson's crossover components are encased in epoxy, i.e., "potted," which would make them difficult to modify. You might be able to check this by looking at the crossovers in your W/P 6.1s.
The W/P 7s are less bright than your W/P 6.1s, in part I believe because the company had to switch tweeter suppliers. This has been described as an improvement, but its desirability is subjective.
The W/P 7s are less bright than your W/P 6.1s, in part I believe because the company had to switch tweeter suppliers. This has been described as an improvement, but its desirability is subjective.