[LAU] OT: unbalanced to balanced

This is so way-OT, but I trust the knowledge on this list in general, so I'm hoping someone can help me... I've extracted a little mono amp out of a pair of computer speakers that I would like to use as a general practice/noise amp. It currently has a balanced 1/8" input. The wires going to the input are: black, white, and a braid of wires (I'm assuming shield?). I'd like to cut this 1/8" plug off and add a 1/4" female jack so I can plug stuff into it. But where do I solder the wires to? (i.e., black to tip, white to sleeve, that kind of thing) I have access to stereo and mono 1/4" jacks. Thanks, and sorry again for the OT. PS - I've read that the proper way to do this is to use an audio transformer, but that's WAY overkill for this project, I just want sound to come out, nothing audiophile or anything like that. -- Josh Lawrence http://www.hardbop200.com