I notice that the sound volume is lower when an external player (e.g., MP3 player or mobile phone) is connected to the speaker via AUX-IN connection than via Bluetooth connection. Is that normal?


Yes. This is normal. This is because of the volume output limitation of the MP3 player or mobile phone. This limitation is designed to protect your hearing when you listen to music from the MP3 player or mobile phone using an earphone.

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