The Denon AVR-X1600H vs Marantz NR1504 comparison proves that these receivers have many common features.
A significant difference between the receivers in the number of channels, Denon AVR-X1600H has 7.2 versus 5.1 for Marantz NR1504. Regarding power, then AVR-X1600H has such a W/Ohm ratio - 80/8 20Hz-20KHz, 120/6 1KHz when NR1504 has a power of 50/8 20Hz-20KHz, 60/6 1KHz. The THD is the same and is 0.08%.
Characteristics of digital to analog converter (DAC) are different, 384 KHz/32-bit for AVR-X1600H and 192 KHz/24-bit for the NR1504. Only the AVR-X1600H supports Bi-amping feature. Each of the AV receivers can transmit an audio signal directly to the amplifier and bypasses any DSP processing.
Only the Denon AVR-X1600H can connect to the Internet via WI-FI. Rivals from our review have Bluetooth support. The Denon AVR-X1600H has support for AirPlay, AirPlay 2, and its competitor in our comparison - AirPlay. Spotify can be used on each receiver. The AVR-X1600H can work with the audio stream from Deezer, TIDAL, Pandora, Napster, TuneIn Radio, iHeart Radio, Mood Mix, and the NR1504 can receive a content from Pandora, SiriusXM. HDMI signal transmission in standby mode is implemented in each of the devices. Both competitors are not able to scale the HDMI signal. The HDR standard - Dolby Vision is not supported by these receivers.
Each receiver has 6/1 HDMI inputs/outputs. The HDMI Audio Return Channel (ARC) feature supports both devices. The HDMI eARC is available only on the AVR-X1600H. The Consumer Electronics Control (CEC) feature is present in most modern AV receivers and the models in our comparison are no exception. The AVR-X1600H supports the protection of digital content of the standard HDCP 2.3, versus HDCP 2.2 in the NR1504. The AVR-X1600H has a built-in phono stage for connecting a vinyl player. An ECO mode is only available for the AVR-X1600H. Both AVR-X1600H and NR1504 can be configured using the Setup assistant.
Only the AVR-X1600H has a Dolby Atmos multichannel audio format support. A surround technology DTS:X is supported only by the AVR-X1600H.
The Denon AVR-X1600H is better receiver in this comparison. Check Denon AVR-X1600H price