I have an older boom box that hasn't been used. I had another pair of speakers from another boom box that I had. There was only two inputs for the speakers to go into, I put both sets of speaker wires into the speaker port. Is this bad for the speakers or will it just lower sound quality? (See next part)

It really didn't matter to before because they were some throw away speakers that came with the box. I'm now going to end up with a set of Logitech z-680 speakers (Just the speakers) and was wonder if this would ruin them by putting more then one speaker attached. I would think it would ruin quality, not the speakers?

On a side note: What can I do with a Logitech sub woofer without the pod?