Turn up the volume on your boombox, connected device, or Bluetooth device.
Connect your boombox to a different audio source to see if the problem continues. If the problem stops, the problem may be with the original device.
If using a connected device, your audio cable may be damaged. Replace the audio cable, if the problem stops, the cause was the original audio cable.
If using Bluetooth, move your boombox and the paired device closer together. The maximum distance is 33 feet (10 meters). However, this distance may be reduced if the signal has to pass through walls or other obstructions.
If you are using Bluetooth, other devices, such as cordless phones or microwaves, may cause interference. Try turning one device off at a time to determine which device is causing interference.
You can select a sound mode to automatically adjust the sound for the type of music you are playing. To select the sound mode, press the Sound button repeatedly until the sound mode you want appears on the LCD. You can select JAZZ, POP, CLASSIC, ROCK, or FLAT.
Make sure that the power adapter is connected securely and correctly into the DC IN jack on the back of your boombox.
Make sure that the power adapter is connected securely and correctly to a working power outlet.
Your batteries may be dead. Replace the batteries with six type C batteries. Make sure that the + and – symbols on the batteries align with the + and – symbols inside the battery compartment. Caution: Do not mix different types of batteries together (for example, alkaline, rechargeable or carbon zinc).
Your boombox can stream music from paired devices such as smartphones, notebooks, tablets, and audio devices with the Bluetooth protocols A2DP and AVRCP. See the User Guide that came with your Bluetooth device for more information.
Do not try to play DVDs, VCDs, or data CDs in your boombox. You may damage your boombox.