Smart phone Music to Old Stereo Amp And Speakers

[Holladay]

I just a little smart and found my ripped CD's (that took awhile) that I put on MP3 players years ago. They are now on my smart phone operated by a dummy.

I have some nice speakers on my old school reciever/amps. Harmon Kardon and Pinicale speakers.

I need to know how to get my Smart phone (guessing blue tooth tech) to interface with my old stereos.

I searched CP and didn't find anything.

Thanks...sure it is easy. I have not searched the web. I am not sure what to look for.

Next question would be how to download music and save them to a file. Spotify and Google music use data to stream. I want them in a file. I use a Trac-phone for $100/year. No unlimited data. Obviously, I don't use a cell phone much. It is a tool though.