The TX-RZ630 bumps up to 9 channels and adds fully immersive 5.2.4-channel DTS:X® or Dolby Atmos® object-based surround-sound to stunning 4K HDR video on your compatible display. A muscular hub for whole-home entertainment, it can power speakers in Main, Zone 2 and Zone 3 and share audio to any supported hi-fi system via wireless platforms including Chromecast built-in, DTS Play-Fi® technology or FlareConnect™. You can also stream content over AirPlay, Wi-Fi® or Bluetooth® wireless technology. Dynamic Audio Amplification has upgraded parts for earthquake bass and flawless treble: check out the 5 Hz–100 kHz frequency response. The amp’s blistering dynamics, high current and nuanced voicing gets more from music, be it a vinyl record, Hi-Res Audio album or mix of sources playing around the house. The receiver also includes AccuEQ Advance room-acoustic calibration with AccuReflex™ for a cohesive theater-room soundstage.