I have a question regarding this. I want to use an output, which is a balanced signal XLR plug, to drive a poweramp which has a 1/4" input. The only cables I found which are XLR female to 1/4" are microphone cables that are 10' and longer. The output in question is that of an Ampeg PF20T and the input in question is that of a GSS Baby Sumo. I cannot tell if it is a balanced TRS input, but I think it is mono 1/4". I have a soldering iron at the ready and could make my own cable if need be. So which cable will do the job?