Please check if the VOLUME can be adjusted on the source device.
Reset the speaker by performing the following steps:
1. Turn OFF the HD7 and charge it for at least 30 min.
2. Make sure the AUX cable is not plugged in.
3. Disconnect the device from your speaker and remove HD7 from your device’s pairing list by clicking on “Forget this device”.
4. Reboot your device.
5. Turn ON the speaker.
6. Press the VOLUME + and VOLUME - buttons simultaneously and hold for 1 second.
7. Repeat the steps for pairing.
If the issue still persists and you want our further assistance, please click Contact Us. We will be happy to help.