My receiver doesn't have a dedicated subwoofer output, can I still hook up a subwoofer?

Yes, as long as the subwoofer has speaker-level inputs and outputs. You can hook up this type of subwoofer in line between your receiver and main stereo speakers. Run one set of speaker wires from the receiver's "A" speaker outputs to the subwoofer, and then run another set of speaker wires from the subwoofer to your main stereo speakers.

I believe the AVR110 DOES indeed have a subwoofer output. I have this model and i am using its subwoofer output.

Check again closely - it's directly next to the right front speaker connector.

get a active sub and use an audio splitter on the input..