Hello Greg,
To control the volume of the treble or bass sound, press the SOUND CONTROL button to select TREBLE or BASS and then adjust the volume between -6 to +6 by using the Up/Down buttons.
To fine tune your soundbar, press and hold the (Sound Control) button for about 5 seconds to adjust the sound for each frequency band. 150Hz, 300Hz, 600Hz, 1.2kHz, 2.5kHz, 5kHz, and 10kHz are selectable using the Left/Right buttons and each can be adjusted to a setting between -6 to +6 using the Up/Down buttons. (Make sure the Sound mode is set to “STANDARD”.)
If you need any extra assistance, please reach out to Samsung Customer Service. We are happy to help 7 days a week, from 8 AM to 12 AM.
Call us at 1-800-SAMSUNG (ask for Soundbars).
~Samsung Solutions