Choice for wilson Watt/puppy 5.1 internal wiring

Telling us a little bit about the rest of your system would help. What amp are you using, what cable, your source, etc?

Spend some time getting use to your new speaker. Pay careful attention to toe-in and vertical tilt angle. If all else fails you should go ahead an experiment with the internal wire.

There is a youtube video of how to change the internal wiring of a Wilson W/P. But of course, proceed with caution. I agree with the other contributors here. The WP requires exacting set up to sound the best so first make sure you have followed the instructions. Second, try a softer sounding cable from the source to pre like Stealth PGS or Cardas golden cross. This will tame the top end and provide a more full bodied sound without ripping up the speakers.

My local Wilson dealer sold a lot of Transparent cables with the network, specifically to calm down the Focal tweeter Wilson uses.
List the rest of your system, and you'll get advice from Wilson owners on this site...

The curse of a mod forthis type of speaker is too high for the slight change in sound from an internal wire change. Perhaps a 5% change. Try a tube amp or preamp known to tame the hot top end. Mods will kill resale value unless factory done. Jallen

Before you go changing things internally.Try moving them around and look at room acoustics. They might not be as bright as they seem once that's taking care of...best of luck.