What’s your vote for the most ridiculous, overpriced, and useless tweak?

Piezoelectric wall outlet covers work and they work extremely well. You can test this yourself with fo.Q tape, stuck onto the outside of a regular outlet cover. A cheap way to re-arrange your thinking.

^^^ Try pasting the inside of the wall outlet cover with PPT Total Contact and see what happens.

Frank

I’ve been designing and selling audiophile products based on piezoelectric crystals for a wide range of audio applications, including but not limited to power plugs, walls, windows, room acoustics, for more than 15 years. I also designed and have been selling a wall outlet that acts like a resonator for around ten years but who’s counting?  No big deal. Maybe for someone living in a cave.

I agree with Frank. But first coat the inside with fo.Q tape and then apply the Total Contact onto the fo.Q tape. I found that to be even better, and it’s easily removable if you move out of the house.

My main wall duplex outlet has SR graphene treated screws for the wiring, fo.Q/TC inner plate lining, fo.Q outer plate lining and AVM paint on the internal wiring and casing. Unused outlets are plugged with PPT Stop-It! duplex plugs. I think it was also blasted with the SR Tesla coil when I sent it to SR for treatment. I’m happy with the results.

@stringreen , good point. I never got on well with spikes - maybe it was my ancient floorboards to blame. So naturally I'm biased a little, and maybe that colours what I hear. I don't know, but they didn't work for me.

I also hate the thought of record clamps, heavy ones especially because of the additional weight just where you don't want it. 

You're right this hobby is largely about preferences or else it would be easy and we'd all have similar systems.