Hi Nono! I’m sorry to see that you are having difficulties with the subwoofer built in to your Sound Tower. So that we can better identify the issue troubleshoot towards a solution, please reach out to Samsung Support at: 1-800-SAMSUNG (ask for Soundbars), available 8AM - 12AM EST, 7 days a week, or Chat with us on Samsung.com: https://www.samsung.com/us/support/contact/
^Tim