Hi Jrad! The HW-Q90R is a 7.1.4 soundbar system that included wireless rear speakers. This soundbar will not be compatible with the SWA-9500S. If you need to replace the rear speakers for the HW-Q90R please contact Samsung Customer Support at 1-800-SAMSUNG (ask for Soundbars), 8AM -12AM EST (Mon-Fri), 9AM – 6PM EST (Sat), text HELP to 62913, LiveChat on Samsung.com, or Email: https://www.samsung.com/us/support/#contact_us_for_support
We look forward to hearing from you.
^Tim