Denon AVR-X1400H has 7 channels of analog amplification on discrete elements, with a power of 80 W/channel. The receiver has modern DAC chips - Asahi Kasei 4490EQ. They provide higher conversion accuracy and extended dynamic range. The unit is designed to work in the classic "one-room" home theater system with one video receiver that plays 4K video with all relevant standards. Supported object-oriented formats of multi-channel sound Dolby Atmos and DTS: X. It also supports Bluetooth with Restore mode for playing compressed recordings. With the DLNA technology receiver receives streaming audio from your PC or NAS-server.
The Onkyo TX-NR676 is the 7.2-Channel unit, which offers content playback with Dolby Atmos/DTS:X decoders. Network capabilities are comparable to those of an opponent in the Denon AVR-X1400H vs Onkyo TX-NR676 comparison. The device also can work with popular streaming services such as Spotify and Tidal. There is Chromecast built-in, Wi-Fi, AirPlay, and Bluetooth for music streaming. For remote receiver control, the native Onkyo application can be used, the pairing and subsequent configuration are quick and easy. It is also worth mentioning the presence of a multi-room HEOS system, which extends the capabilities of the device.
The Denon AVR-X1400H is better receiver in this comparison. Check Denon AVR-X1400H price