Thanks, hotbird. That is what I tried. I connected the wire to my equitech which has a grounding screw, then moved the puck under the equitech, cdp and amp. The only effect was with the amp.
Please correct me if I am describing wrongly what you are doing.
1) The Acoustic Revive RGC24 in your case is always grounded to your Equitech, regardless of where you place your puck (under Equitech/cdp/amp), since only your Equitech equipment has that grounding screw, and you choose to use the grounding screw connection, instead of the alternatively supplied RCA connector.
2) If what I described in 1) is correct, can you do it a bit differently? That is do not use the grounding screw connection, but use the supplied grounding RCA connector provided with the RGC24, and then look for an unused RCA outlet on the CDP equipment to connect the RGC24 puck. IMHO, I don't think you can ground the RGC24 to a power conditioner and then apply the puck on a different equipment. The RGC24 puck and grounding connector should always be applied on the same equipment for it to be effective.
Below is the supplied RCA plug which can be screwed on to the grounding screw C clip

Then connect that RCA plug to an unused RCA outlet.
