Okay, thank you guys! I figured it out.
My Denon turntable does have a built in phono pre-amp, but it was turned off.
Now that I've turned it on, sound IS coming from the speakers, but at a low volume even with the volume up "high." I think that has to do with the fact that I haven't placed my speakers properly (just left them on opposite sides of the room).
My Denon turntable does have a built in phono pre-amp, but it was turned off.
Now that I've turned it on, sound IS coming from the speakers, but at a low volume even with the volume up "high." I think that has to do with the fact that I haven't placed my speakers properly (just left them on opposite sides of the room).

