If not, does the turntable have an analog audio output placed after the phono pre amp?
Best Buy claims this for the table, "Built-in phono preamp; EQ switch for devices without a phono input"
That would suggest you can plug the table into a sound bar if the sound bar has discrete (two channel) auxiliary input and a volume control of its own. Try the "aux" input on the bar if you can control volume independent of the AV system.