Good question, Jylee, if somewhat cynical/sarcastic. Obviously, I would hope to hear the difference of a mod that costs a few thousand $. I was hoping to have the answer before testing it, since it involves buying a new balanced cable that would be redundant if it bypasses the new circuit. And no, I cant easily test it with single-ended cables, because the output of the APL is 4V, which is too high for the preamp with single-ended, but not for balanced cable. (only 3.7 v - limit is 4 v)
I understand that I can test it, but was trying to get the answer prior to testing it in the hope that I could avoid buying an unnecessary cable. However, since I have not heard from Alex, will go ahead and get a balanced cable and do what you helpfully suggest:)