if its the sub im thinking, im guessing its about 350wrms? (1000 peak)in which case, that amp will be ok to run at 4ohm, nothing more, otherwise the following weekend you will be buying a new sub

as the person above me said, look at a 12" sub, theyre better all round, some audio places like bass junkies do offers for your requirements
12" sub in either ported or sealed box
decent amp to match the sub
decent gauge cabling to power the above