Comes with main SubCenter 5.1 System Suround; However I tryed to use it in my 7.2 system Sony receiver and used Pioneer Andrew Jones for fronts and boy it sounded good and loud but my neighbors complained to much and since I live in apartments I wasn't able to use it anymore and original OR sub was never used because I have Polk as well!!!! So if u want Ill sell OR and Pioneer fronts and my High-end 4K Sony receiver and Polk Sub that way this system could return back to its GLORY(Ofcource give you a good discount)!! Olin Ross system retails for $999 and beats all Thouse stupid BOSE acustomas out of the water! Because back 8yrs ago it Retailed $3000 and puts Bose to shame