Sonos Arc power cord is loose

Is yours flush, like the picture above? 

If it isn’t flush try my suggestion (on page 1 here) to use a DRY silicon lube on the cord.

Just a light touch on the outside of the connector.

Update: 

I took the Arc off its wall mount and got the power cord end all the way in,

so it now looks like the photo above and it is now snug.

Note to all: It must be perfectly flush. It’s all or nothing!

Thanks for the photo!

The picture above (Nhopper) is what finally helped me resolve the loose cord issue. After a year of dealing with it popping out, I finally just got a pair of needle nose pliers and pushed the cord in...it went in nice and snug! I was pleasantly surprised that after all this time it was supposed to go in that far! Thanks for the photo! 

I had the same issue, so I took a torch to see what was going on. I noticed that there was a hole about the size of the power plug disk and the bottom of my disk was flush with the surface of this hole, but not actually fully plugged into the socket underneath. so I manoeuvred the disk around and it just fit into the hole with little or no tolerance around the edge. I was then able to push it in further and the disk top was then fully flush with the hole. It is now rock solid. Silly mistake I know, but easy to make if you are installing in low light. Hope this helps someone.

I had the same problem with my Arc, push hard the power cable and it will click.  You wont need a new power cable

I had the exact same issues and it was driving me crazy!  What I found was I thought the flange on the cord fits flush to the opening, however I did indeed need to push the cord in further so the flange actually recessed into the opening.  Once the cord flange was fully pushed into the opening, the connection was solid.  Now it is secure!

I was having kittens after spending so much money to find the cable kept disconnecting from my ARC. But thanks to this thread learnt that all I had to do was push really

hard on the plug to get it seated correctly. It is now rock solid.

The wide outer ring of the plug actually goes inside the plug hole on the ARC. It takes some real force to get it to click in, but once in, it then looks completely flush with the outside of the ARC body. 

I was having kittens after spending so much money to find the cable kept disconnecting from my ARC. But thanks to this thread learnt that all I had to do was push really

hard on the plug to get it seated correctly. It is now rock solid.

The wide outer ring of the plug actually goes inside the plug hole on the ARC. It takes some real force to get it to click in, but once in, it then looks completely flush with the outside of the ARC body. 

 

This is a terrible design flaw that Sonos is reticent to acknowledge,  I have had nothing but frustration trying to convey the issue to customer service,  they are in utter denial about the issue

What issue? The flange is what’s holding the connector connected. It can only do that when it is pushed in so the outside of the connector sits flush with the speaker.