Why do my 306 speakers not working after plugging in new stereo?

If your 306 speakers aren't working after plugging in a new stereo, check the connections to ensure they are securely plugged into both the stereo and the power source. Verify that the new stereo is properly configured and set to the correct input source. Additionally, check if the stereo's volume is turned up and if any mute settings are enabled. Lastly, inspect the speakers for any damage or blown fuses.