Each of these speakers connects to left and right channels and behaves as a pair of speakers to the connected amplifier.

As far as the SONOS AMP is concerned, two pairs of 8-Ohm speakers are connected and this is OK. Actually, since you likely have a long length of wire involved, the speaker wire adds a bit of protection. Each speaker presents 8-Ohms plus wire resistance to AMP.

i suggest that you inspect all wire connections associated with the speakers, especially the outdoor connections, for corrosion. It’s a tough world out there.

Thanks Buzz,  to clarify. 

I should be connecting the two positive terminals on each speaker and two negative terminals on each speaker together for a single channel (parallel wiring). This would present a 4ohm load as each speaker is a DVC I believe.  

Just want to confirm that it should be done that way in lieu of series wiring. 
 

Thank you for the reminder on the connections.  It’s been that way for about 11 years so it will be necessary to confirm no corrosion 

https://support.sonos.com/en-us/article/connect-four-speakers-to-your-amp-or-connect-amp

No, don’t use series wiring for the DVC versions. One set of wires for each speaker is connected to the AMP left channel and the other set is connected to the right channel. Be sure to match +/- on both speakers and at AMP. I’m assuming that independent 4-conductor wire is running from AMP to each speaker.

Here is the speaker manual.

Thanks everyone this answers all of my questions appreciate the quick responses