Audio Bluetooth Transmitter/Receiver

Hi All,

So I remember that back in the day, Google had a device that allowed you to daisy chain multiple speaker systems into one via AUX connections.

Is there anything new in this market?

I have a dream of connecting my 1980s sound systems with a record player and 8-track tape player to other systems, think Bluetooth sound bars, a bookshelf boom box with cassette player circa early 2000s. Then, using it to stream from my phone like Amazon Music.

Any ideas on what to look at?

Any podcasters’ recommendations who are into this?

Also worried about devices that require a subscription or internet to work. I mean, if Google can discontinue support for their device, who can you trust?

Thanks!