An affordable AV receiver is always a good option to consider, so Yamaha RX-S602 vs Denon AVR-X1400H comparison definitely makes sense.
A significant difference between the receivers in the number of channels, Yamaha RX-S602 has 5.1 versus 7.2 for Denon AVR-X1400H. Regarding power, then RX-S602 has such a W/Ohm ratio - 80/8, 125/6 when AVR-X1400H has a power of 80/8, 120/6. The THD is the same and is 0.08%.
Characteristics of digital to analog converter (DAC) are different, Burr-Brown 384 KHz/32-bit for RX-S602 and 192 KHz/24-bit for the AVR-X1400H. Both the RX-S602 and the AVR-X1400H support Bi-amping. Each of the AV receivers can transmit an audio signal directly to the amplifier and bypasses any DSP processing. Rivals from our review have Bluetooth support. The Apple Music service is implemented on considered devices: AirPlay, AirPlay 2. Spotify can be used on each receiver. The RX-S602 can work with the audio stream from Deezer, TIDAL, Pandora, Napster, SiriusXM, Qobuz, and the AVR-X1400H can receive a content from Deezer, TIDAL, Pandora, Napster, SiriusXM, TuneIn Radio, iHeart Radio, Sound Cloud. Compared AV receivers retain the quality of 4K/60Hz signal when transmitting from a source to a TV or projector. HDMI signal transmission in standby mode is implemented in each of the devices. Both competitors are not able to scale the HDMI signal. Dolby Vision technology found support only on the AVR-X1400H.
The Yamaha RX-S602 has 4/1 HDMI inputs/outputs versus 6/1 HDMI connectors of the Denon AVR-X1400H. The HDMI Audio Return Channel (ARC) feature supports both devices. Unfortunately, HDMI eARC is not available on monitored devices. The Consumer Electronics Control (CEC) feature is present in most modern AV receivers and the models in our comparison are no exception. The RX-S602 supports the protection of digital content of the standard HDCP 2.3, versus HDCP 2.2 in the AVR-X1400H. Receivers do not have a built-in phono stage for connecting a vinyl player.
The RX-S602 supports 2 Multi-room zones, versus 3 for the AVR-X1400H. The RX-S602 supports voice control via Amazon Alexa, Google Assistant, and the AVR-X1400H - Amazon Alexa, Google Assistant, Siri, Josh.AI. It is also worth noting that the ECO mode is presented in each of the receivers. Both RX-S602 and AVR-X1400H can be configured using the Setup assistant.
Only the AVR-X1400H has a Dolby Atmos multichannel audio format support. A surround technology DTS:X is supported only by the AVR-X1400H.