Um.....
For how come? I've never had problems plugging TS cables into TRS balanced ins or outs, and to have one end of a balanced cable HI Z eliminates the function of a balanced cable in the first place...
UNLESS...
You want to convert a stereo signal to mono...
Of course, you know there are what they call "line transformers" out there, I have a bunch of TRS-to-RCA and Stereo-to-mono-1/4" plug-in types...Cheap and occasionally sound....
Eric