So, in that case…I’ll keep my thought to myself!
In reality your suggestion would completely eliminate transformer hum. 
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In truth, I consider myself to be very lucky…no transformer hum since the 1990s!
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I am nowhere as delicate as posts on the thread have led to be. With my gold-plated spade connectors supplied with two grub screws for each connector, I tightened until the supplied alan key began to flex.
Then, I used my 10" electrician pliers to clamp down the spade on the post on the speaker. They are not coming off. Maybe there is too much gorilla grip for some, and I sit back and enjoy the music. Please click on my bio for connector details and other information.
Mitch in Oz.
Some speaker sockets will rotate in their mounting if you apply this much torque to them, potentially causing damage inside.
Anyone thinking of doing this should approach with caution.
My thoughts too, and when new, several of the earth screws were loose, to the point of the cable moving (reported back to Naim at the time).
I suspect the (tinned?) cables relaxed after tightening.
Shouldn’t be any tinning of mains cables connected to a screw terminal.
No Solder in power supply mains connection flex.
Solder is soft metal in fault conditions the solder can melt and become unstable before fusing operates all wires need mechanical fastening ie so solder to pcb needs wire lugs (which has crimp or screw terminal ) and stranded wire not loose or split industry standards dont allow it.
I’ve used a light touch with cartridge screws to good effect, around 5cNm seems to suit many and for speaker driver screws Naim give a torque, or a warning not to mess with them in the case of the NBL bass module, but I’ve not paid attention to tension of the plug screws. With MKs there’s no cable clamp screws and the wire terminals use posts with flanged screws so I wonder if 50cNm holds for those too. I’ll try that torque if I ever get around to building a block with Furutech and replacing the UK plugs on my Powerlines. Probably the 552’s plug is the place to experiment given how much of a diva it is in other respects.
There are two Mains MK plugs in most popular use in the UK first is the safety plug with wrap round and flanged screws.
The other one is the MK Toughplug I use these with ferrules so the multistrand does not split.
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Anyone have an inexpensive Torque screwdriver recommendation?
I’ve been happy with the Seeley I mentioned above, model no. STS103, it was about £40 a couple of years ago, which is pretty cheap for a digital one and it’s useful that it covers a range from 5Nm right down to almost zero.
My only criticism is that the small LCD and buttons are a bit fiddly, but for occasional use I can live with that.
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This is quite true. Being a tradesman, I have the feeling in my hands when enough torque is enough. 45 years on the tools.
Even I can make mistakes.
Warm regards,
Mitch in Oz.
Thanks ChrisSU.
I should have mentioned I’m in North America. That model number seems to be a UK version.
Naim provide the torque settings in the PowerLine manual.
manual? men dont read manuals 
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Only if all else fails 
.
or come to this forum and let someone else read the manual 
This is all silly
Everyone knows the only thing that matters is what track you use
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I’m wondering how a conversation went from… It’s a nice day today, to… make sure you only tighten powerline cable clamping screws to 0.5Nm. 
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