A:Answer Don't know about the ARC feature, but I can tell you that there is no hookup for a standard old-school turntable (one with a ground wire). If your turntable has been purchased within the last 10 years or so, it should have its own phono stage/preamp, and you should be able to connect the turntable's RCA outputs to any of the RCA audio input jacks that you are not using.