Moreno Mitchell has posted a review of the Entreq ground boxes ($729-$3150) at Stereo Times. His conclusions:
“Upon removing the Eartha Apollo cables, I too noticed - in a similar fashion to what Clement also experienced - the sound took a turn for the worse. The grunge returned. Grunge, I admit that I never knew was there in the first place had returned. The sense of bloom, naturalness and depth had lessened while the overall listening experience was noticeably reduced.”
You can read the full review here.
You can find links to more reviews of the Entreq ground boxes here.