Sonos themselves don’t offer a repair service, nor do they authorize any external shops to do so. That being said, there are some shops that will break the warranty, if any remaining, on your device, and fix it, but they’re few and far between, and it seems as though Sonos doesn’t prefer we post about them here in the Sonos owned forums. If there is a place near you that is willing to attempt a fix, and you’re unwilling/unable to return it for replacement or discount from Sonos, you’re better off googling local repair shops, and calling them to see if they’re willing to affect a repair for you. 

I'd call Sonos support just to see if there are any options as the first step.

You might be able to find a similar size/impedance speaker and swap it yourself. Likely won't sound as good as the original but might be inexpensive.

Thanks for the response. Since it is a DVT it will not be supported by Sonos. So I need to find my own "support" . I didnt find any replacement parts. So that confirms what you tell me. Sad to see repairability is not encouraged by such a big brand. Anyway, I'll keep my eyes open for another broken device to buy and make one out of it :) 

You can probably find a used unit with a bad battery.

Sorry, DVT doesn’t mean anything to me, other than Deep Vein Thrombosis, but I concur with both ​@Stanley_4 and ​@buzz 

Well it is one of the final test batches of the speaker before it hits the market (design verification test). Somebody at Sonos received it. Probably for free.

I did not know that when I bought it second hand few years back. It has no registered serial number and support won't help me

​@Negruj 

I saw elsewhere you bought that a few days ago, asking if it was legit. If it’s recently bought (rather than a few years ago like you say here) and it’s not working, can you not return it to the seller as they’ve sold you a Roam with a rattling bass speaker (even if it is a DVT model).

Well I don't want to make things complicated for the people here since the history of the device is not the core issue. It is how I can fix it myself or a service. 

So I'm going offtopic here to explain.

Step one: Sonos employee gets this device in 2020.

Step two: previous owner buys it from the employee a few years back. He did not know what a DVT is. Nor did I. 

Step three: the previous owner sells it to me. I ask about what dvt is (see step 4). He did not know. So that is why I was questioning it elsewhere.

Step four: I rook it up with Sonos support. They tell me it is not supported since it is dvt. I asked the previous owner. He did not know either and said he had bought it years ago and didn't have any problems. Not having any further info.

I did not include all this info and combined step 2 and 3 to make it simple. The original owner is not in scope anymore since a few years. Sending it back to the seller who sold it to me is not an option anymore. It is what it is, so I'm looking for a way to fix it. That's the core question. 

Search the Internet. There are many examples of self repair. The cost of a professional repair will likely be more than you paid for the unit.

Thanks for your response Buzz but ofcourse I did that. Except...there is no after market. So thats why I came here to inform myself on an experts forum. Fyi the speaker module of the roam is one part glued together. Not very repairable and there are no tutorials on that.

That being said. I fixed the issue. It seems it was not the speaker but a very little small plastic bumper that had moved behind the speaker.

For potential future reference, I was able to find units “for parts” on eBay. 

Hi ​@Negruj, welcome to the Sonos Community!

I've reached out internally about this speaker and asked a colleague to contact you regarding this unit so we can get a replacement set up via your support ticket that you created earlier. Keep an eye out for a message from them and if you don’t hear back in a few days please let me know and I’ll follow up with them.

I hope this helps!