No, speakers perform best when properly matched to an amplifier. If that amplifier happens to be 1 ohm stable then I'd say yes, it will in general deliver more power to that speaker than one that was say 2 or 4 ohms.
If I get a mono amp and hook it up, will it automaticly fuction at 1 ohm, or is there a special way to hook it up to bring it down to 1 ohm. And what happens if you cross the negative and positive on a 2 channel amp (runnin the positive from one channel to the positive and the negative from the second channel to the negative),is that parallel?