I would like to install surround sound in my house. I have an older Sony system, maybe 15 years or older, but of course it's all a hardwired solution. I'm wondering if I can get a decent Bluetooth (or other wireless) solution where all the satellite speakers plug in to wall outlets (no batteries required) and sound good at a reasonable price, maybe under $300 or so. Basically I don't want to run speaker wires to make it work.

I've done some cursory searches, but am pretty unfamiliar with the landscape of what's available. I do have a smart home setup, with Alexa and such, and saw that Sonos would be an option to integrate with that, but it's pretty expensive. But, Alexa integration would be a bonus.

So, any ideas on something like this?

https://www.lifewire.com/wireless-speakers-and-home-theater-1846770