I would think that would bypass the Entreq altogether and go straight to ground. I think as an experiment you might find direct to the ground in the outlet would be better than the Entreq.
I made an adapter from a spare male plug and attached a banana jack to the back side with only a wire from it to the ground pin of the Furutech male wall plug so I only connected the banana to ground via the plug. Then I could stack up plugs to experiment with. Now I use my new black ground box instead going to earth and a copper rod instead.
I believe Entreq's and other boxes are full of stuff simulating earth because most folks don't have the acumen to mess with wires and ground rods and wall outlets.