You can hardwire a single Play 1 to your network and have the second Play 1 connect to ir via Sonosnet, but the moves are not compatible with Sonosnet and will have to stay connected to your WIFI. So leaving them all on WIFI would be the best way to keep them connected.
Four Sonos speakers would not cause you to lose that much speed unless there is something wrong with your network?
Can you share what type of network you have?
What you are describing should not be happening with 148Mbps. There is something else going on with your network. Please describe your network in detail including all hardware and ISP.
BTW…my comments don’t negate advice given by @Pools-3015. However the issue needs to examined further.
Note: Looks like @Pools-3015 edited their post while I was posting
Thanks for you help guys.
Andrews and Arnold is the IP, fttp - Openreach ONT - FireBrick FB2900 - xclaim Xi2 AP wired- PS5 wired
SkyQ + 3x mini boxes. Then Mac 3x iPhones dell laptop 2xipads.
@Handcandy
Thanks for the network information. Unfortunately I’m in the US and not very familiar with SkyQ networking. Although I have heard (depending upon the configuration) it can be problematic with Sonos. Hopefully someone in the UK will see this thread and offer assistance. You can also CALL Sonos Tech support for assistance. Good luck and Happy Holidays!