Onkyo TX-NR555 review & specs

Onkyo TX-NR555 is compatible with your expectations – do you want to know why?

Onkyo TX-NR555

In my opinion, Onkyo TX-NR555 is a really respectable example of how home theater amplifiers have changed for last years, beginning from being the audio centerpiece to controlling audio, video, network, and streaming different sources. The Onkyo TX-NR555 is produced for use in an average-sized room, but it also has Zone 2 function. Experience truly lifelike multi-dimensional sound with DTS X featuring interactivity that let personalize the great listening experience.

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The TX-NR555 came to me packaged with a remote control, which is completely different from the control panel, where are only the most necessary buttons - the menu control button, input switching and playback control of the built-in player. Then in a package, I found AM/FM antennas, a microphone for the AccuEQ speaker setup system and usual manual for setting up.


The TX-NR555 can be connected via Ethernet or built-in Wifi, which provides you access to music streaming content from your computer or any media servers on your home network. Using firmware update I add Google Cast, what about AirPlay it is already in a receiver. I really like the function of built-in Bluetooth, which allows direct wireless streaming from various devices, such as smartphones and tablets. Good news for those who prefer to listen to vinyl records – you can find a phono input for their listening. It is important to mention about an additional audio feature that TX-NR555 has - compatibility with FireConnect by BlackFire Research via a firmware update. After installing it I can send the internet, USB and Bluetooth audio to speakers, that I placed in another room of my house.


New menu graphics provide an easy-to-use interface to customize your listening and viewing experience. The receiver feature powered and lineout Zone 2 connections for bringing to a second room.

The TX-NR555 provides Zone 2 operation for sending a separately controllable audio source to another room. But what is important to note that with either option, it is impossible to have separate sources playing in both the main and 2nd Zones if you select NET or Bluetooth, and you cannot listen to two different radio stations (the NR555 only has one radio tuner). Despite on this I want to share with you two ways to take advantage of the Zone 2 feature:

  • Use the dedicated Zone 2 speaker terminals. Connect Zone 2 speakers directly to the receiver and you are set to go.
  • Use the provided preamp outputs instead of the speaker connections. However, using this option require the connection of the Zone 2 preamp outputs to a second two-channel amplifier (I had a stereo-only receiver as an extra one available, so I used that).

Video Performance

The TX-NR555 features both HDMI and analog video inputs but it continues the trend of eliminating S-video inputs and outputs, that is so incredible! The TX-NR555 can provide video pass-through of 2D, 3D, and 4K video signals, as well as providing up to 4K upscaling, which is becoming more common on home theater receivers in this price range. I found out the TX-NR555 can provide near excellent upscaling from standard definition (480i) to 4K.

Sound Quality

Where action goes sound follows – that is how Onkyo presents their new product, and I totally agree with the producer. Using Blu-Ray Disc content in both formats, the surround sound field opened up to me, released from the horizontal constraints of traditional surround sound formats and speaker layouts. I have watched dozens of films until began writing this review. Not because I am a lazy person, but I just could not stop amazing from the quality of the sound – all those environmental effects, such as rain, wind, explosions, planes, helicopters were accurately placed above the listening position. And this is because of the encoded effect Dolby Atmos and DTS:X, which definitely provides an immersive listening experience with fuller front stage and more precise placement of objects in the surround sound field.

Its plenty loud, has a ridiculous amount of settings, even for ceiling speakers beyond the 7.1. The AccuEQ program really cleans up messy room acoustics and makes the music sound clean to the point you probably don't even need the EQ settings (yes, it has equalizer settings for each pair of speakers well beyond the simple bass/treble in the quick menu).

If there are people who prefer listening to FM radio, the amazing sensitivity of the FM tuner section provided good reception of the FM radio signals using the provided wire antenna.


Onkyo TX-NR555 is compatible with the latest ultra HD content offerings and feature the latest HDMI specs fully supporting stunning 4K video. Which means that the NR555 is compatible with all modern video formats, it is also important to note that the NR555 can be connected to any TV that has an HDMI input. Personally, I easily connected all my favorite HDMI and enjoyed 1080p to 4K upscaling.

Amazing and convenient HDMI connection option is Standby Pass-Through. Even when the receiver is turned off you can designate your Onkyo TX-NR555 audio and the video signal is passed through the NR555 to your TV. You will find this great when you wish to watch something from a media streamer, but do not want to turn on your full home theater system.


Speaker setup is easy with Onkyo`s room acoustic calibration system, featuring new Acura Flex technology that accounts for up firing height speakers to ensure cohesive reproduction of object-based soundtracks. For setting up the TX-NR555 you can use the built-in test tone generator with a sound meter and make all your speaker level distance and level settings manually.

Also, you can take advantage of the receiver's built-in AccuEQ room calibration system as I did. In a case, if you are calibrating the room for a Dolby Atmos setup, an additional setup feature, called AccuReflex, which takes into account any sound delay issues when using vertically firing height speakers.

By the way, you should know that automatic setup results may not always be precisely accurate (for example, the speaker level may not be to your liking). When it is, do not change the automatic settings, but, instead, go into the Manual Speaker Settings and make any further adjustments from there. Are your speakers calibrated to your room and all your sources connected? So the TX-NR555 is ready to go.

Conclusion: I analyzed all the best sides of Onkyo TX-NR555 and took my decision

This receiver features dynamic audio amplification that drives accurate noise-free signal processing with high current power for precise speaker control. VLSC (Vector Linear Shaping Circuitry) reproduces audio signals with extremely high fidelity for rich and authentic sound.

The Onkyo TX-NR555 is a very good value for those who cannot afford a high-end receiver, but eager the same features for use in a medium size room. Even if you can not take the plunge into Dolby Atmos or DTS:X, the NR555 can still be used for 5.1 or 7.1 channel setups.

This receiver has plenty of HDMI inputs, 4k capable, and you can choose one to simply pass through with the receiver off. I also like the fact that it will pass the full bass response to the main speakers if you don't have a subwoofer. So if you have a great set of main speakers capable of reproducing deep bass, it will work nicely without a sub. It's wifi ability and simple to connect Pandora button works great too. Setup was a breeze using the microphone. I definitely recommend this receiver.

Common features


Onkyo TX-NR555






4.1 of 5




Total output power

560 W

Output power per channel

140 W, 80 W

Output impedance per channel

6 Ohm, 8 Ohm

Frequency response

20 Hz-20 kHz

Total harmonic distortion

0.08 %

Number of channels


Signal-to-noise ratio

106 dB


Digital player

Internet radio

Network audio player

Audio formats



Apple lossless





Built-in decoders


Dolby Atmos

Dolby digital plus

Dolby surround

Dolby true HD

Built-in display





Connectivity interfaces



IEEE 802.3

IEEE 802.3u

Signal processing

HDMI pass-through

up to 4K

Video conversion/scaling

Analog to HDMI up conversion

3D pass-through

Upscaling via HDMI

up to 4K

Connector type

AV inputs


Optical digital inputs


Coaxial digital inputs


HDMI inputs


HDMI outputs


Optical digital outputs

has not

Coaxial digital outputs

has not

Subwoofer outputs






Media content source





Tuner type


Tuner bands


Preset station


Additional features

A-B speaker switch

Three-zone capability

Advanced sound retriever (ASR) technology

Apple air-play support

Audio return channel (ARC)


Auto power off

Pure direct mode

Dual-zone capability

Smartphone remote control

Sound features

Audio D/A converter

32bit / 384kHz

Surround sound effects

Theater-Dimensional Virtual Surround

Surround system class

7.2 channel

Digital content protection

has not


Built-in clock

has not

Sleep timer

has not

Power device

Operational power consumption

460 W

Standby power consumption

0.1 W

User manual




22.5 x 18 x 11 inches


22 pounds
Onkyo TX-NR555
Onkyo TX-NR555

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