I’ve got trouble with same issue. it made me crazy.

Is there anyone who sorted out the problem? it made me really annoyed.   

whenever I tried to change the line out level from variable to pass-through, it reverted to variable and Volume level is very low...

Not me. I ended up getting an amp for other reasons but am really frustrated by this issue on the Connect and I was tempted not to buy an amp because of it. I don’t understand why the Sonos team are just ignoring this issue from long term loyal customers. 

I have a dedicated amplifier though it is a serious problem to old Sonos customers.

Add me with the same problem ZP80 with external amp.  tested all other components and that seems to be the one that has failed so I assume it is the capacitors as per timc995 post.  Bummer. At the moment I have to choose between music in bathroom and garage. 

I am having the same very frustrating issue.  After spending hours on the phone with Sonos support after I installed my Port, they said they’d not heard of this issue before and suggested the product was defective out of the box.  After over 2 months of frustration in getting my warranty replacement, I received the new product yesterday which has the EXACT same issue.  The volume is sufficient and and equal with all the other outputs on my amp if I select “fixed” vs “variable” but if I wanted to manually adjust the volume on my amp every time, I don’t know why I would have purchased the Port in the first place.  The whole point is because it’s automated. It’s not acceptable that Sonos just chimes in with a link to how variable vs fixed works, instead of actually addressing that there is an issue. 

Yes, sorry, I realize now I might have posted this on the incorrect thread.  There are similar threads with the same issue r/t the Port. 

Sure sounds like the pre-amp(s) have failed, and the Sonos is only getting a phono level input, rather than a line level input. 

I’m looking into the optical to phono solution as I just moved, reconnected everything after being boxed up for months, updated all the devices (haven’t done that in years), and all 3 of my Connects have this issue...barely audible at max volume regardless of the line-out level setting. They are all connected to the same receivers they were connected to before...for years. Something up and it really feels like the update to me.

Dug out my even older S1 connects out (I have 2 of them), and they are working fine! This is uncanny. They can’t not know about this.

Two questions: this can afflict Connect Amp as well? And will it then show in speaker sound levels when playing streamed music as well as that from line in?

The Connect:amp doesn’t have this kind of failure.  If the connect:amp doesn’t drive speakers, it’s usually related to blown amplifier circuitry.

I don’t understand the second question.  That question seems to be unrelated to the issue this repair addresses.

Is not the Connect Amp essentially a Connect that has its RCA outputs internally wired to the amplification stage on the Connect Amp? And if the defect is in what should then be the same circuit after the digital to analog conversion, it should not matter where the music signal is coming from?

I ask because one of my Connect Amps seems to have had this symptom present in one of the wired passive speakers, that are also two decades old, ten year older than the Connect Amp. I first suspected the speakers, but I think I have been able to rule that out.

Right now, there is no trouble, but if it has happened in the past, and the reason was not addressed, it may reappear; so the question is for then, really.

Same here on my ZP90 very low and distorted audio on RCA analog output. S1 11.9

I think, it's time to go for Bluesound.

Fair enough! Thank you.

Bump

Thanks for reply.  Are you real or an Answer bot please ?

Problem is persistent.

Diagnostics - submitted - 1445311186
 

Great - thanks have submitted the diagnostics as requested

Any reply please Sonos ?

You need to post the actual diagnostic number here for Support to have a look.

Hi folks,

@Airgetlam and @controlav, thank you for your usual assistance. We really appreciate it. 

@LJ2018, thank you for reaching out to us and welcome to the Sonos community. I appreciate you for providing us your concern and submitting the diagnostic. Let me help you and figure out what's happening.

Upon checking the report, it's telling me that the diagnostic was incomplete and not returning any information about your system. However, I can see that all your speakers are online.

Can you please submit another diagnostic? You can also try to submit from another mobile device/controller and include the confirmation numbers in your response for us to check. 

If you have any questions about this. We and the community are always here to help.

I did above:- 1445311186

 

Have done it again.  

Sonos Diagonstic number:  786276586

Hi @LJ2018, thank you for your response and for submitting another diagnostic for us to check. Let me help you with this.

Based on the diagnostic, there's no line-in connection on your Sonos Connect and the ethernet cable is potentially faulty. This could be one of the reasons why you're not getting audio. Also, an audio dropout was detected in your due to sync error and the audio feed is too slow causing the playback to stop.

Let me suggest the next troubleshooting and see if it works for you.

1. Power off your Sonos Connect.
   • Disconnect the left and right speakers and line-in connection. 
   • Wait for at least 30 minutes.
   • Reconnect all the connections and power it back on.
   • Start playback to test the audio.
2. Check the volume.
   • Depending on your Line-Out Level setting, you may need to adjust the volume in both the Sonos app and on your receiver
   • If you have your Line-Out Level set to Fixed, you will need to adjust the volume on the receiver or device that you have connected to Port or Connect.
   • If the Line-Out Level is set to Variable or Pass-Through, try adjusting the volume on both the receiver and in the Sonos app. 
3. Change the wireless channel on the Sonos app
   • Settings > System > Network > Networks > SonosNet Channel > Set it to 11
   • Observe your Sonos system performance.

If you're still not getting audio from your connect, it would be best for you to continue working with us over the phone to expedite the process. I recommend contacting our Sonos Customer Care support to perform further troubleshooting to provide the best option for you.

Please let us know if you still have further questions or concerns. We are always here to help.

Apologies.  The I was at work and not at home and the audio stream was inactive.  Completely my error I was trying to speed things along.

Ive replicated the error and submitted more diagnostics.  Confirmation Number 1010030269

That said I have read your above comments.  It is so frustrating when you blame the hardware, when the hardware has been in place for 9 years, was working and the only change has been an app update !

I also stated there is a sound feed but it is very faint.

Ive also stated above the Volume is set to fixed and has been since install, setting it to pass thru results in the same extremely low volume.

Ive connected another device to the second system (replacing the sonos element) and it performs as it should with the correct volume.  So the fault is definitely with the sonos connect.

The connect is currently unplugged for the 30 mins as suggested above - it does not have speakers attached, only 2 network cables and the line-out are in use)

Please review the new diagnostics.  1010030269

Hi @LJ2018, thank you for your response and for submitting another diagnostic. We appreciate you for sharing your feedback. We’re sorry your experience didn’t match your expectations. Let me help you with this.

The troubleshooting steps we provided depending on the error we found in the diagnostic report. Looking at the latest diagnostic, I still see the same errors and some of your speakers (2 Play 1's and 1 Connect Amp) don't have a connection to our Sonos cloud server. I would still recommend performing the steps we provided in this thread since the issue was not resolved. To address the cloud connection of your speakers, you can perform a sequential reboot of your network devices, all your Sonos products, and force close mobile controllers to refresh the connection. 

We really appreciate the time and effort you've spent in resolving this issue, it would be best for you to continue working with us over the phone to expedite the process. I recommend contacting our Sonos Customer Care support to perform in-depth troubleshooting with your full network setup including the make and model of each device and to do some tests on the Sonos app to isolate the issue to provide the best option for you.

Please feel free to reach out in the future if you have any other questions. You're always welcome here.

I have plugged Connect back in after 45 mins, no change to volume - still very faint. Now some intermittent crackling.

Further diagnostics  - 1449653583

Is there a reference number I should supply to Customer care ?