Denon AVR-S910W 7.2 Channel Full 4K Ultra HD A/V Receiver + A Polk Audio TSi Series Home Theater Speaker Package (TSi 400, TSi 100, CS10 & PSW125) You Will Receive : (1) Denon AVR-S910W + (2) Polk Audio TSi400 + (1) Polk Audio TSi100 + (1) Polk Audio CS10 + (1) PSW125 Subwoofer Denon AVR-S910W: Full Specification 4K Ultra HD Compatibility Polk Audio TSi400: Three 5-1/4" Polycarbonate Woofers Polk Audio TSi100: Heavy Duty Wall-Hanging Brackets Are Built Right In Polk Audio CS10: Enclosure Flips To Accommodate TV-Top or Below-Screen Placement