Mains: Klipsch Chorus (new caps, Ti tweeter upgrade) Rears: Klipsch KG 4 (new caps, however rear right speaker has a blown tweeter, replacement is on the way) Subwoofer: Do-it-yourself Dayton Audio Reference HO 15 inch in a Denovo box, courtesy of Parts-Express Subwoofer amp: Dayton Audio SA1000 Receiver: a budget Pioneer, model VSX-530. My old Yamaha had a nasty hum and I couldn't take it so I bought this on a whim when I completed the sub a few days ago. It will find its permanent home in my bedroom, once I buy a legit amp for this system.