Mateo, a TRS balanced to XLR cable is absolutely fine. No problem. It will work identical, in this application, to what your current connection configuration (KPA Main Out XLR to XLR Input on your Friedman). However, unless you need to free up the XLR Outputs on your KPA, there is no reason to buy this cable...your current connection works just as well.
Cheers,
John
That's it.