Devil's advocate:

Why would you want to knowingly cripple your audio signal?

One of the key advantages of playing digitally is that it gives you frequency possibilities that vinyl can't even begin to attempt.

The RIAA curve is something you should look into though.

Theoretically, if you apply a cut using that curve and then boost using the inverse you should get the same effect you hear on wax.

Past that, a tiny little bit of harmonic distortion on the low end wouldn't go amiss.