Hi! Different sound modes will have different effect on the rear speaker audio. If you set the sound mode to SURROUND, GAME PRO, or ADAPTIVE, you should get surround sound effect from the rear speakers. For additional assistance, please reach out to Samsung Support at: 1-800-SAMSUNG, available 8AM - 12AM EST, 7 days a week, or Chat with us on Samsung.com: https://www.samsung.com/us/support/contact/
^Tim