Cannot connect Gen2 Sub to Amp since updating to S2

As a troubleshooting exercise, if you move the Sub closer to the Amp (in the same room)  is the connection solid?

I assume the speakers wired to the Amp are in the same room as the Sub?

Good call on troubleshooting. So with the sub in the same room as the Amp, it works. This was never as issue with the S1 controller and Amp; only an issue since “upgrading” to S2.

The speakers wired to the Amp are in the same room as the Sub, but the Amp itself is on the floor below in a room with all of our AV equipment - direct wiring the sub or the Amp to the floor above is not tenable without drilling through floor etc. Even a Boost would require a LAN connection to floor above, correct? 

Hi. First, the Sonos app is just a remote control and the way the Sub connects to the Amp is identical in S2 and S1. So please put aside any thoughts that this has anything to do with changing to S2.

Sonos Subs connect to HT devices by direct routing over 5GHz. 5GHz signals are not great for wall penetration, and I have seen many examples of problems with Subs in different rooms from the main HT device.

Improving the signal to the Amp might help, and that might be achieved by wiring a Boost (or other Sonos device) to your router. No drilling required. But no way of being sure it would help. Is the system fully WiFi at the moment?

Thanks John.

the speakers are in-wall wired to a few different amps, and I can get LAN to the Amps. But the speakers they power and sub is in a separate room on floor above. 
We used the system for years with S1 controller AND older version of Amp, and only with newer Amp hardware I never actually got the dub to work at all. Now 8 months ago or so.

*sub

If I did add a Boost, where would it’s optimal location be, relative to the Amp and Sub?

If you can Ethernet to the Amp, that is better than using a Boost anyway, so I would try that instead.

I can’t say that I am optimistic that this or a Boost would help.

Is there any location in the room where the Sub is located that the Sub will connect to the Amp?

The Connect:Amp didn’t have a 5GHz radio so I presume connected to the Sub over 2.4GHz (which is better for wall penetration).  That is nothing to do with S1 vs S2.  But I admit doesn’t help you.

(The Amp is designed to work for AV applications as well as music, which the C:A wasn’t.  5GHz is used on Sonos HT systems to reduce latency for AV applications.)

Thanks, John.

I actually had an ethernet connected to the Amp, with no luck. 

I assume that the new Gen3 Sub would face the same issues, as it sounds like the trouble is the 5GHz radio? 

I’ll try a Boost - it also operates only with a 5GHz radio which is why you are not optimistic about this solution? To give it the best shot, I assume I should have it as close as possible to the Sub in the floor below?

I wish Sonos would have made this issue clear for upgraders with components in different rooms, seems like this should not be an uncommon situation! I guess the other option is backtracking to Connect:Amp.

The Boost only operates on 2.4GHz. I suspect you aren't clear about the nature and purpose of the Boost. It is wired to the router in order to create SonosNet. If you can wire the Amp anyway then a Boost would be absolutely, totally, completely, 100% pointless. 

OK, please clarify if you will. Is the primary issue in your opinion that the Amp can’t communicate with the Sub, since unlike the prior version Connect:Amp, the newer Amp does not have a 2.4GHz radio? Then, if the Boost functions to connect the Sonos components using 2.4GHz, why wouldn’t that work? 

Also, if someone from Sonos could let me know what should be done in cases like mine, or whether the only viable alternative is to regress to older Connect:Amp hardware, that would be great.

The Amp has a 2.4GGz radio. It uses it to connect to either SonosNet or your WiFi. 

Sonos HT devices (including the Amp) connect to surrounds and Sub directly over 5GHz. Note: I am 100% sure that 5GHz is used when the Amp is playing an HDMI source. I am 99% certain that 5GHz is also used for music sources from the Amp, but you may want to see if anyone else can confirm this 100%.

I have explained the purpose of the Boost. It cannot directly affect the connection between Sub and Amp.