HT-SF150 soundbar Audio is Flat and Quiet once turned off

[Callum185]

I have an issue with the HT-SF150 soundbar. If I turn it off at the plug and turn it on again, the audio is perfect and crisp. But if I turn the sound bar off and back on with the remote the audio is quiet and flat. Any reason for this?  

[TheGOAT]

@Callum185 Are you connecting it via HDMI or Bluetooth? Also, are you connecting it to a TV or other devices?