Ok, so I recently bought an LMIII and a Schroeder BMF1215. I've had them for at least a week I think, and I just recently read on here that connecting the 2 with an instrument cable is NOT safe. So I'm not going to use it anymore until I get a speaker cable. What I want to know is, is there a way to tell if I've done damage already? I haven't noticed anything, but discovering this little piece of info scared me.