I’ve followed the Entreq website of listed ingredients along with installing of an electrical outlet on my grounding box that serves my dac and server. The only difference is that I’ve plugged the grounding box into my conditioner vs the wall outlet Entreq states , for me in my system it yields better results.
I also used more wires and material in my box previously , then I read the updated Entreq site and others where they use a single 2 meter long silver wire with multiple layers of ingredients and multiple compartments and implemented the same.
I’d say for me the biggest improvements in SQ was following Entreq in the size and weight of the grounding box matches the size od component it’s grounding.
My amp box is bigger and weights more then my Accuphase A 65 amp and that made a huge difference vs the smaller box I used previously. The amp weights over 90 lbs and the new grounding box had to be filled at the desired location because I wasn’t going to pick it up and move it at 60 yrs old.