Sonos Connect - Very low sound since Feb 2026

Sometimes updates cause odd behavior, often a network refresh will restore normal operation.

Power down all Sonos Reboot router and controller, then power up your Sonos. 

Thanks ​@Stanley_4 I have tried all the usual fixes (including this) & still no resolution. I’ve had an hour long call with Sonos through a couple of levels of support but no further forward. It happened around directly after an update in February which would more than suggest that the update was the cause. Would also be a coincidence if 4 out of 6 Connects suddenly developed this issue at the same time, randomly.

Sonos are now talking about out of warranty (the Connects are all 3 years old) replacement which I assume comes with a cost...

 Are the 4 that have low volume connected via digital out?

​@MoPac none are digital out. The speakers go directly to mini amps and then each Sonos ‘Connect’ is connected to the next ‘Connect’ via ethernet and then last ‘Connect’ is connected to a network switch which in turn is connected to the broadband router.

I don't think the six deep dasychain on Ethernet should be a problem, at least it hasn't been. Still, I'd grab a cheap ($20 but not on the incompatible hardware list on the support pages) 8 port switch and split the incoming Ethernet there, eliminating the chain.

Kinda grasping at straws with that but it is cheap to try.

​@Stanley_4 The setup was working fine for 3 years but I do have another smaller switch I can slot in and it’s worth a try.

The fact that they are still working and giving output, albeit at a very low level, would suggest it’s not a connectiviity issue, I think...

Odd things fall out of updates, my suggestion is unlikely but possible and easy to test.

Hopefully support looked at all the other common issues.

Any difference in the manufacturing dates /  hardware versions that could explain the different results of the update?

​@Stanley_4  all hardware seems to be the same;

Version (17.2.4)

Build (86.6-75110)

Hardware Version (1.17.5.5-2.1)

I doubt that this daisy chain is suddenly the issue. A chain issue would result in missing or intermittently slow units. An easy test would be to temporarily disconnect one or more units from the chain or change the order of the network connections. Note that if you disconnect a unit, the disconnected unit will attempt to use SonosNet wireless. Unless there is some wireless congestion or you have disabled WiFi on that and the other units, there should be no issue with respect to the disconnected wired unit. SonosNet requires at least one wired unit.

I assume that you have checked the Line-In/Line-Out settings.

Note that, while unlikely, we cannot rule out a hardware issue with one or more of the CONNECTS. An update can rearrange the software memory locations and a defective, but previously unused area of memory can now be causing issues. You can test for this by systematically powering down a unit -- being careful not to break the network chain. Keep notes.