Yamaha YHT-4910UBL 5.1-Channel Home Theater System 5-channel, 100W per channel powerful surround sound reproduction Virtual Cinema front provides an enveloping surround sound experience even when placing speakers in the rear of the room Extra bass provides rich deep bass even with small satellite speaker cabinets YPAO auto room calibration system maximizes room performance 4K ultra HD pass-through supports the latest high resolution video formats