Hi Venky10, We appreciate you taking a few moments to review the Samsung HW-Q65C Soundbar. You can manually optimize your audio experience by pressing the SOUND MODE button to select the desired pre-equalized sound setting. The choices are SURROUND SOUND – GAME – ADAPTIVE SOUND – DTS VIRTUAL:X – STANDARD. To control the volume of the treble or bass press the TONE CONTROL button, and then adjust the volume between -6 to +6 by using the Up/Down buttons on your soundbar remote. 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”.) Press the CH LEVEL button so you can adjust the volume of each speaker. CENTER LEVEL can be adjusted using the UP/DOWN buttons from -6 to +6. If you would like louder (or softer) bass from your subwoofer, you can adjust the level by rocking the WOOFER button on the soundbar remote, and then adjusting the level from -6 to +6. To set the subwoofer volume level to 0, press the button in. If you need more help, Samsung is here for you. Please call us at 1-800-SAMSUNG, 8AM - 12AM EST (Ask for Soundbars), 7 days a week. Our Live Chat agents are also available by clicking on the ‘Support’ link on our website. ~ Samsung Solutions