need help setting up my subwoofer

I am a newbie to all this and would appreciate some help setting up my subwoofer. I have a Denon 1612, Cambridge S30 speakers, and an Energy S10.3 sub. So far I have the speakers working fine, but I do not feel like the sub has kicked in at all so far. I have the crossover on the sub set to around 80 (this was recommended to me). I am not a huge thumping bass person and so far the speakers alone sound great on their own, but I wonder if I am missing something. I have mainly tested with music so far, but I can unplug the sub and I hear no difference. Are their settings in the receiver that I need to be setting also?

I actually tried that and I did hear the speakers making the noises, but when it said sub I heard nothing coming from the sub. Maybe the receiver didn't recognize the sub and therefore isn't playing it?