Sound from the Soundbar subwoofer is too low

Follow these steps to troubleshoot the issue:

1. On the remote control, press the + (Plus) button of the SW (subwoofer volume) to turn up the subwoofer volume.
   
   Note: The button name (subwoofer volume, BASS, etc.) varies depending on the model.
2. If Night mode is set to ON, set it to OFF.
   
   Note: For details regarding Night mode, refer to the product manuals .
3. Play the test tone or built-in demo music to verify if any sound is coming out of the subwoofer. 
   • HT-A5000/HT-A7000/HT-A9/HT-X9000F/XF9000/Z9F/ZF9
     1. Press the HOME button on the remote control.
     2. Select Setup.
     3. Select Advanced Settings.
     4. Select Speaker Settings.
     5. Select Manual Speaker Settings.
     6. Select Test Tone, and then select On.
        
        Note: Select Off to end playback of Test Tone.
   • HT-S40R

     While USB input is selected, the TEST TONE will not be output even though it is set to ON. To make sure the TEST TONE is played, select an input other than USB.

     1. On the remote control, press the MENU button to turn on the menu in the front panel display.
     2. Select SPEAKER → TEST TONE → ON to output the test tone from each speaker.
     3. Press the MENU button to turn off the menu in the display.
     Notes:

     • To select the item and setting you want, press ↑ (upper), ↓ (lower) or ENTER repeatedly. You can return to the previous layer by pressing the BACK button.
     • To turn off the TEST TONE, select SPEAKER → TEST TONE → OFF.

   • HT-S400
     1. On the bar speaker, press and hold the TV button for five seconds to play the built-in demo music.
     2. Press the TV button again. The built-in demo music will stop and the Soundbar returns to the TV input.
   • Other models
     1. On the Soundbar, press the INPUT button or Input Select button for five seconds to playback the sample music.
     2. Press the INPUT or Input Select button again to end playback of the sample music and return it to its former state.