question about this amp

I bought a rockford fosgate 501x http://www.rockfordfosgate.com/ez2/ModelInfo/ModelInfo.asp?ItemKey=10061229&CategoryDesc=Punch%20Amplifiers

I was wondering if there is any way to tell if theres a sub in/ out on it or do i have to wait till it gets here

sub in/out? what?

are you wondering about crossovers? or whether it can power a sub? the answer is yes to both of these.....but im not even sure if thats what you are asking

Its a 4 channel amp with the option to bridge..most likely you are going to get a Front and Rear speaker RCA input..you won't have a specific "sub" channel input or output (mostly thats on 5 channel amps with a pair of F/R/S inputs and 4 speaker outputs plus 1 for the sub)..just run the RCA's to the rear and bridge accordingly..