Sonos Sub Gen 3 crackling/static sound

Hi all, another update from me:

I have now gone through 4 units of Sub gen 3 and have finally found one that is “good enough".

It does still have the hiss/crackling sound, but from this unit I can only hear it from 5-10 cm away.

The other 3 units I have tried I could hear it from 3 m away.

Still hoping for a permanent fix from Sonos, but I fear that it might be hardware related?

Received my Sub gen 3 a couple of days ago and found that it made a mains hum/crackle sound too. I spent over an hour talking to technical support and sending them videos of the problem. Eventually they agreed to send a replacement which should arrive on 23rd November. However, after reading this thread I don’t expect the replacement will be any better. I guess this is a hardware issue and won’t be resolved until they design out the flaw.

This problem seems to go back over 4 months. Why did they act like they had never heared of this issue before? This lack of quality and support is definitely not what I expected from Sonos. Do they even bother to read posts on their own forum?

I have the same issue. Last week ordered the sub gen 3 and arc. When the sub is Connecting with the arc the static noise starts. Hopefully Sonos Gets it solved.

I have this EXACT issue! What is the recommended course of action? I am in Canada. Thank you.

Should I contact support and reference Andrew's case number?

@TwoBiteBrownies 

Yes, I’ve shared the case number with you and just reach out to the customer service. It seems to me that this is still happening with the new units, I hope they can resolve the problem for good and send a perfectly working replacement as I think the issue seems quite wide spread.

@andrewchiu1st 

Your case file must be very long lol. The support worker has been reading it for a good 15 minutes 😂😂😂

Update on my end: Spoke to support worker. Didn't even need to send in a video or do diagnostics. I just put my phone up to the Sub and he could hear the insanely loud ticking/hard drive-like noise. He insisted on a replacement, but I told him I didn't think that would work based on what I read on this thread. After referencing @andrewchiu1st 's case number he told me that a replacement solved the problem for him. I asked again because I wasn't so sure, but he insisted. 

This Sonos agent I pray to God is right because I am physically walking this sub 20 minutes away to return it. I don't own a car and told the agent that I would legit need to carry the sub to return it because I cannot use Uber / Don't have anyone in my bubble that drives (Covid). He once again insisted that a replacement would solve my problems and that they would check that it works before shipping out my replacement. Can @Krishma M confirm that this agent is correct before I break my back returning this sub? Thank you.

Edit: Just learned that they do scheduled pickup. Wish the agent would have mentioned this because he just kept saying "don't worry". Breaking my back is no longer a concern of mine. Hopefully the replacement will fix this.

Hmm, I wish the replacement did solve my problem, haha! I requested 1 replacement, but it still has the same problem.

When I last checked with them, they wanted to offer another replacement but when I saw that people who purchased the device only recently are still having the same problem, I have some doubts that another replacement is going to solve the problem if it’s an issue with the production.

@Krishma M Considering that this is  a production issue, will my return window be extended for keeping a defective sub? From my understanding you only have something like 45 or 60 days to return the product. Once this issue is fixed in your production can I contact you guys and get a guarenteed working replacement even if I am not within the prescribed timeframe to return?