A:Answer Hi Johnny.
Thanks for the great question! The UB-20 Series II brackets are compatible with the 321 array, 321GS array, AM6 cube, AM10 cube,Doubleshot cube (vertical and center), Falcon cube (vertical and single), Gemstone ES array, LS800 cube, Singleshot cube, Jewel Cube (double and center), Direct/Reflecting II cube (vertical and center), Jewel Cube II (vertical and center) and the Virtually Invisible II cube. If you have any further questions we would recommend contacting your local Bose support team at this link https://bose.life/2qwENj4. Click on your country, scroll down until you see "Contact Us." Regards, Tony G - Bose Support