I need a speaker system that can talk to my speakers

Home speaker system I need to replace.

I need one that can have the speaker output switched to a 4 channel speaker, or can be a pair of stereo speakers.

I also need a system that is able to connect to the internet through the speaker, and also needs to be able to play back 4 channels of audio.

I don’t know how many of these things you can get, so I’m trying to find out.