Onkyo TX-NR555 vs Denon AVR-X6400H review

Votes 1 1
Rating 5 5

AV receivers comparison chart

Onkyo TX-NR555 vs Denon AVR-X6400H review

Onkyo TX-NR555
vs
Denon AVR-X6400H

The Onkyo TX-NR555 vs Denon AVR-X6400H comparison will be extremely helpful for people who want to get a great, powerful receiver with many functions.

Amplifier

The number of channels for receivers is different - 7.2 versus 11.2, respectively, for devices. In terms of power, there are differences, the TX-NR555 has such a ratio W/Ohm - 130/6, while the AVR-X6400H has a power of 140/8, 250/6. The value of total harmonic distortion is also different, and for the TX-NR555 it is 0.08%, but for the AVR-X6400H it is 0.05%.

Audio features

The manufacturer installed different DACs, the TX-NR555 received the model Hi-Grade 384 KHz/32-bit, but the AVR-X6400H is equipped with AK4458 384 KHz/32-bit. Each of the compared opponents supports Bi-amping. Both Onkyo TX-NR555 and Denon AVR-X6400H can transmit an audio signal directly to the amplifier and bypasses any DSP processing. Each of the receivers has a Bluetooth connector. The contenders have differences in the supported services from Apple - AirPlay versus AirPlay, AirPlay 2 respectively. Access to the Spotify service is on each of the competitors. The number of available streaming services varies for receivers, the Onkyo TX-NR555 works with Deezer, TIDAL, Pandora, but the Denon AVR-X6400H works with Deezer, TIDAL, Pandora, Napster, SiriusXM, TuneIn Radio, iHeart Radio, Sound Cloud.

Video features

Support for the HDR function can only boast of each of the AV receivers. The quality of 4K/60Hz signal remains unchanged when transmitting from a source to a TV or projector via HDMI for both receivers. Signaling over HDMI in standby mode can provide the TX-NR555 and the AVR-X6400H. Video scaling is only possible with the AVR-X6400H. Operation with the Dolby Vision is only possible with the AVR-X6400H.

Extensive connections

The number of HDMI inputs/outputs varies depending on the receiver, the TX-NR555 has 6/1, and the AVR-X6400H has 8/3.Onkyo TX-NR555 connectionsDenon AVR-X6400H connections HDMI Audio Return Channel is implemented in both devices. HDMI eARC is only supported by the AVR-X6400H. When comparing receivers, it becomes clear that each of the rivals can work with HDMI CEC. TX-NR555 and AVR-X6400H support the standard HDCP 2.2. Like most receivers, our models have a built-in phono stage for connecting a vinyl player.

Additional features

Unlike the TX-NR555 where 2 Multi zones is provided, the AVR-X6400H works with 3 Multi zones. There is an ECO mode in either AV receiver. The Denon AVR-X6400H can be properly configured using the setup assistant.

Multichannel surround

A Dolby Atmos multichannel audio format is available both models. A DTS:X surround technology is supported by devices from our comparison.

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General

Item

Onkyo TX-NR555
Denon AVR-X6400H

Model

TX-NR555
AVR-X6400H

Brand

Onkyo
Denon

Reviews

82
57

Amplifier

Channels

7.2
11.2

Stereo power (RMS), W/Ohm

130/6
140/8, 250/6

Output impedance, Ohm

6
8, 6

Frequency response

10Hz-100KHz
10Hz-100KHz

THD in stereo, %

0.08
0.05

Audio features

Digital to analog converter (DAC)

Hi-Grade 384 KHz/32-bit
AK4458 384 KHz/32-bit

Bi-amping

Pure direct (straight)

Auto speaker calibration

AccuEQ
Audyssey MultEQ XT32

Speaker A/B switching

Other audio features

Double Bass Function, CinemaFILTER
Audyssey Dynamic Volume, Audyssey Dynamic EQ, Audyssey LFC

Connectivity

Wi-Fi

2.4/5GHz

USB

1 (USB 2.0)
1 (USB 2.0)

Bluetooth

Ethernet (RJ45)

1
1

DLNA

MHL

Streaming services

Apple Music (AirPlay)

AirPlay
AirPlay, AirPlay 2

Amazon Music

Spotify

Other streaming services

Deezer, TIDAL, Pandora
Deezer, TIDAL, Pandora, Napster, SiriusXM, TuneIn Radio, iHeart Radio, Sound Cloud

Extensive connection

HDMI input/output

6/1
8/3

HDMI ARC (Audio Return Channel)

HDMI eARC (Enhanced Audio Return Channel)

HDMI CEC

Digital content protection (HDCP)

HDCP 2.2
HDCP 2.2

Subwoofer output (LFE)

2
2

Headphone output

1 x 6.3
1 x 6.3

Optical digital input

2
2

Coaxial digital input

1
2

Composite input

2
5

Component input/output

2/0
2/1

Phono (MM) input

Front panel connectors

phones, setup mic, AUX
USB, HDMI, phones, setup mic, AUX

Multi channel preamp output

Video features

HDR (High Dynamic Range)

4K signal pass-through

4K/60Hz
4K/60Hz

8K signal pass-through

HDMI signal pass-through

3D signal pass-through

HDMI pass-through in standby mode

Video conversion

analog to HDMI
analog to HDMI

Analog to HDMI scaling

HDMI to HDMI scaling

Dolby Vision

Other video features

DeepColor, x.v.Color
HLG

Additional features

Voice control

Amazon Alexa, Google Assistant, Siri, Josh.AI

App control

iPhone, iPad, iPod, Android
iPhone, iPad, iPod, Android, Amazon Kindle

Display

colour OSD
colour OSD

Tuner

AM, FM
AM, FM

Sleep timer

Auto power off

ECO mode

Graphical user interface (GUI)

Setup assistant

Firmware update

network, USB
network, USB

Other additional features

has not
IP Control

Multi-room

Multi-room zones

2
3

Zone audio output

speaker, preout
speaker, preout

Zone HDMI output

Multi-room control

FlareConnect
HEOS App, Denon 2016 AVR Remote

RS-232

0
1

Remote control input/output (IR)

0/0
1/1

DC trigger output (12V)

0
2

Multichannel surround

Dolby Atmos

Dolby TrueHD

Dolby Surround

Dolby (other)

has not
Dolby Digital Plus

DTS:X

DTS HD Master

DTS Virtual:X

DTS Neural:X

DTS (other)

has not
DTS-ES, DTS 96/24, DTS-EXPRESS, DTS Surround

Auro-3D

IMAX Enhanced

Multichannel stereo

Audio file formats

MP3

WMA

AAC

WAV

FLAC

ALAC

Other audio file formats

has not
has not

Power

Operational power consumption, W

460
750

Standby consumption, W

0.1
0.1

Removable power cord

User manual

Manual

Dimensions

Size W x H x D, cm/inches

43.5 x 17.3 x 37.8/17 x 6.7 x 14.5
43.1 x 15.2 x 38.1/17.1 x 6.6 x 15.5

Weight, kg/lbs

9.4/20.7
14.4/32

Other

Release year

2016
2017
Onkyo TX-NR555
Denon AVR-X6400H
Onkyo TX-NR555
Denon AVR-X6400H

AV receivers SoundInspiration comparison rating

  • better
  • worse
  • 7
  • 9.4
  • 7Onkyo TX-NR555
  • 9.4Denon AVR-X6400H