AMP keeps dropping out for less than a second while the rest of SONOS continues

Many thanks Bruce! I would need to know a bit more, which you hopefully can deliver. In my setup in my study, it is just the PC, a line to the Amp, and the speaker wires to the two Bose speakers. This is what the Amp is actually for: to amplify what comes from a source (turntable, cassette recorder, PC) and needs to be amplified for the speakers. I do not see any wifi coming into this. The speakers have no wifi. The Amp gets the line out music from the PC without any wifi. It sends the amplified sound to the speakers, and they perform really well, as may be expected from Bose, without wifi. 

But perhaps you mean to say that there could be a wifi interference when the Amp sends on the signal to the Sonos system and Sonos speakers throughout the house. It is rather strange that the Sonos speakers play the music fully synchronic with the Bose speakers, but they have no drop out - only the Bose speakers have the drop out. 

But perhaps the Amp does not prioritise the signals to the Bose speakers? Is it because the Bose speakers do not have wifi? Any suggestions would be very welcome. 

All Sonos devices are networked devices, whether or not they are accessed by WiFi. They sit on your LAN. Which means they can be subject to duplicate IP address issues, and if they’re on WiFi (and frankly, even sometimes if not), they can be subject to various forms of wifi interference . 

Note, all Sonos analog line ins are expecting a line level input, most ’older’ turntables require a pre-amp to boost their phono level output up to line level. Most amplifiers, at least older ones, had one built in, which is why they had specific inputs labeled for the phono jacks…you couldn’t take the phono level input and take it in via a tape input. 

But back to your issue…the Sonos Amp doesn’t really ‘know’ what it is sending a signal to. It just knows it is sending out an amplified signal, at a nominal 8 ohms. If you’re having dropouts, it shouldn’t be between the Sonos Amp and the unamplified BOSE, it will be between your network and the Sonos Amp.

Things would be much more challenging if you were sending an amplified signal from the Sonos Amp to a powered (amplified) BOSE set of speakers…there are all sorts of issues to overcome there…mostly to do with not blowing out the input with an already amplified signal. This is why the Sonos Port was made (and the Sonos CONNECT before), to supply that line level output to connect to devices that are self amplified, and only looking for a line level input. 

In the meantime the disruptions of sound have spread all over the SONOS system; there is thus a real problem with wifi interference. I will look at the articles on the SONOS website and hope to be able to solve this. 

I would still recommend that you submit a system diagnostic within 10 minutes of experiencing this problem, and call Sonos Support to discuss it. But don’t post the resulting diagnostic number here, they get sensitive about GDPR.

There may be information included in the diagnostic that will help Sonos pinpoint the issue and help you find a solution.

When you speak directly to the Support staff, they have tools at their disposal that will allow them to give you advice specific to your network and Sonos system.