Yamaha 1840 Home Theatre 5.1 (4K, 4-HDMI IN, Dolby Audio) YHT-1840 5.1-channel home theatre package makes movie enjoyment easily accessible. *5-channel powerful surround sound --- 70 W per Channel (6 ohms, 20 Hz-20 kHz, 0.09% THD, 2-ch driven) --- 100 W per Channel (6 ohms, 1 kHz, 0.9% THD, 1-ch driven) --- 135 W per Channel (6 ohms, 1 kHz, 10% THD, 1-ch driven). *Discrete amp configuration. *HDMI (4 in / 1 out) with 4K Ultra HD full support (4K / 60p [4:4:4]), HDR Video and BT.2020. *Dialogue Level Adjustment for proper sound balance with dialogue and vocals. *Virtual CINEMA FRONT provides virtual surround sound with 5 speakers in front. *Multi-language colour OSD capable of displaying cover art. *Compressed Music Enhancer. *Traditional design enhances any room. *ECO mode operation for about 20% less power consumption. The AV receiver ensures that action movies with loud, dynamic soundtracks will be heard in spectacularly realistic surround sound. The front, surround and center speakers are good quality models capable of reproducing high definition audio, and the subwoofer conveys clean, crisply powerful bass. traditional design speakers enhance any room.