Hey gang. Just replaced my original Sprout with a set of M700’s and a Stellar Dac/Pre. Loving the setup so far. I did notice though that one of the M700’s has a grounding post and the other does not. I’ve not hooked any grounding to the post. Any need to, and if so should the other M700 have one as well. Not getting any noise off of them so best to just leave it alone and listen to music?