The sound of Siltech 550i XLR cable

If you are using differentially balanced circuits ....very little difference no matter what cable you use.

I am using all Ayre electronics into Vandersteen 5A speakers and can only tell you what I've experienced....very little difference indeed.  If I were you, I'd get different cables that you can return with no money expended....that's the only way you'll know for sure.