Naim mu-so microshock

I've heard this mentioned before but haven't experienced it myself with my mu-so. Perhaps wearing rubber wellies would help. 

Static electricity. Wool clothing I gues.

This came up earlier this year and was replied to by Steve Hopkins from Naim (link below). The cause is leakage current to the case work, a feature of double-insulated electronics. It's harmless.

Steve suggested : "Can you try turning around the connector from the mains lead at the Mu-So to see if the polarity makes a difference , it’s a figure of 8 so is easily changed 180 degrees"

https://forums.naimaudio.com/to...34#48028104489035834

Hey hey, it was me who brought that up the last time! I recently shifted house over the weekend and brought the Mu-So to its new home.. I plugged it in hoping it was some issue with the mains in my previous house and turns out it was not... as I didn't have wifi set up in my new home yet I used the aux in on the Mu-So by plugging in my MP3 player and this discharge now happens on the metal chassis of the MP3 player as well.. figures since both devices are now connected together.. flipping the 2 pin connectors around did not change anything as well.

I was also wondering if there were any updates to this, I actually just sent an email to Naim before posting here to see if there's any updates to this as my warranty is expiring soon. It annoys me enough to not want to touch the player at all which is a real shame considering how well built it is.. I can't say I feel such weird discharges from any other device/gadget at home 

I followed the advice from Naim (rotating the power cable) but no improvement.

Like you I avoided touching it because the shock was so unpleasant.

I took it back, I'm afraid. Which is a shame as I'm a long term Naim user (since 1990) and wanted the Muso to complement my main system (which is SuperUniti based).

This was Naim's response:

My suggestion is to reverse the connector to ensure the neutral and live are connected to the unit the “right” way around. Although it will work and be safe both ways, one way will give a lower residual voltage on the case. They’re double insulated and therefore safe – the static discharge is caused by the room that it is used in and is not dangerous. unplugging the mains lead from the bottom of the Mu-so, turning it round 180 degrees and plugging it in again and see if that resolves it.

You could try draining the charge by taping a thin wire to the underside of the case and connecting the other end to a grounded object.

i just bought an Onkyo amp that has is indicated to be double insulated on the rear of it and it also only has a 2 prong plug with no ground attached. I tried to see if it gave me the same microshocks like the mu-so to no avail.. i have never ever gone out of my way before to try to get shocked though so that is a new experience in life!

so i wouldn't say microshocks are a 'feature' of double insulated devices.. it only happens with the mu-so (sadly).. i just try my absolute best to not touch it at all.. i just wish this could've been avoided in the design of it

I just did a quick test and.... I believe those that do not feel anything from their player MIGHT be wearing shoes or some sort of footwear perhaps? I never wear any sort of footwear in my home and today I tried a pair of rubber soled slippers while touching the usual areas where I feel the shocks and they were much, much less obvious..

Maybe that's why it doesn't bother everyone? Could be a valid reason why even the distributor I got it from says it wasn't an issue to him because he was wearing shoes in the shop while trying it!

My Muso doesn't do this, so I suspect it's something to do with your clothes or the environment. Jan's suggestion is probably the best way of dissipating the static charge.

You wont have this problem with Qb, no metal parts visible.

No problems here.