Why is the wireless subwoofer silent on the Xiaomi Desktop Speaker Pro Set?

If the wireless subwoofer is silent on the Xiaomi Desktop Speaker Pro Set, please refer to the following troubleshooting steps:
1. The wireless subwoofer will be silent if it is not powered on or is not properly powered on. Please ensure that the wireless subwoofer of your Xiaomi Desktop Speaker Pro Set is powered on. Under normal power-on conditions, the wireless subwoofer will automatically synchronize with the main speaker's power-on/off, sleep/standby, volume, and sound effects. To power on, briefly press the power button when the subwoofer is off.
2. The wireless subwoofer will be silent due to a temporary system malfunction or connection loss. You can restore the wireless subwoofer to factory settings by pressing and holding the power button for 7 seconds after powering on. This will clear the existing pairing, and the subwoofer will enter a status of waiting for pairing. If the speaker is turned on and is within 0.5 meters of the wireless subwoofer, the two will automatically pair. Observe whether the problem is resolved after reconnecting.
3. At lower volumes, the human ear's sensitivity to low frequencies varies greatly, which will cause the subwoofer to sound silent. Please increase the volume appropriately before testing.
4. If it persists, please contact the official after-sales service for further assistance.