Hello anil,<br /><br />Thank you for purchasing the new HW-C47M Samsung Soundbar. I am sorry to see that your experience has not been ideal.<br /><br />You can optimize your audio performance to your liking by pressing the SOUND MODE button on your soundbar remote and then selecting the desired sound effect by choosing SURROUND SOUND, GAME, or STANDARD. <br /><br />By pressing the TONE CONTROL button, you can adjust the volume of the treble or bass sound between -6~&#43;6 by using the Up/Down buttons. <br /><br />Additionally, using the WOOFER button on the remote, you can adjust the subwoofer’s volume between -6 to &#43;6 by toggling the button up or down. To set the subwoofer volume level to 0, press the button down. <br /><br />When you press the CH LEVEL button, you can adjust the volume of the VIRTUAL CENTER LEVEL. This will allow you to adjust the overall dialogue between -6 to &#43;6 using the UP/DOWN button on the provided Soundbar remote. When you press the CH LEVEL button when the Wireless Rear Speaker Kit connected to the Soundbar, you can adjust the rear speakers between -6 to &#43;6 using the UP/DOWN buttons. <br /><br />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 &#43;6 using the Up/Down buttons. (Make sure the Sound mode is set to “STANDARD”. <br /><br />If we can help with anything else, please call us at 1-800-SAMSUNG (Ask for Soundbars), 8 AM – 12 AM EST, 7 days a week. LiveChat with an agent as well as manuals, software, and warranty info can be found at the ‘Support’ link on our Samsung website. <br />~ Samsung Solutions