I have acquired a bunch of records from my grandfather. They are pretty old so I wouldn't be surprised if they were mono however how do I know for sure? I tried looking for something that said "stereo" or "mono" and found nothing. Should I automatically assume that they are mono? As an aside, is there a major difference with a one channel mono system and a two channel mono system? I would think that one channel would be better because you might get some unfavorable interference with 2 channels.