Hi Aaron! Please know, there are various settings you can adjust to improve your experience with the rear speakers.
You can adjust the volume of the rear speakers by using the remote included with the connected soundbar. Press the CH LEVEL button on the soundbar remote, then select REAR LEVEL and use the Up/Down buttons to adjust the volume within a -6 to +6 range.
Additionally, make sure that the source (e.g. TV output) is sending surround channels to the Soundbar. If you are using a format such as PCM, you may experience decreased volume to the rear speakers. Select Bitstream, Auto, or Pass-Through as these settings will allow the TV to send the correct channels to the rear speakers.
I hope these tips help to enhance your audio enjoyment. Should you need further assistance with this issue or have any questions, please contact Samsung Customer Support.
Select Samsung Soundbars allow you to enable or disable Dynamic Range Control. You can try turning off DRC by pressing and holding the Sound Mode button while the Soundbar is in standby mode.
~ Samsung Solutions