Amazon.com: Bose Smart Ultra Dolby Atmos Soundbar Speaker, White, Bundle Bass Module 700, Sound Bar for Home Audio Speaker TV Wireless, Bluetooth, WiFi, Alexa, Google and Voice Control : Electronics
Used Bose Bass Module 500 for Soundbar 500/700, SoundTouch 300 Soundbars, Black 796145-1100
Bose Bass Module 700 Review - Big Bass For Your Bose Smart Soundbar 600 - YouTube