Alan,

The internal resistors would waste the power if more than one pair of speakers is being used, or does this happen all of the time? If this happens only when more than one pair is being used at the same time then I don't really care, because I plan to rarely use it that way. I do have a good set of Aperion audio speakers that I will be mounting in one room that I would like to get a nice sound out of though.

- Nick