How to connect an old-fashioned power amplifier to a mobile phone or computer?

1. Let's talk about wired audio first. After the audio cable is plugged in, the stereo has a cable specially connected to the mobile phone.

2. Plug this port into the phone.

3. Then click on the phone to play music or a piece of audio. You can adjust the volume through your mobile phone or the knob for adjusting the stereo.

4. Second, when the mobile phone is connected to the Bluetooth/wireless stereo, turn on the Bluetooth stereo first.

5. Then click on the phone, turn on the settings-Bluetooth, and then connect the name of the Bluetooth stereo.

6. Then play the audio directly on the mobile phone.