Onkyo TX-NR656 vs. Onkyo TX-NR555

Onkyo TX-NR656 vs Onkyo TX-NR555

Onkyo TX-NR656 vs Onkyo TX-NR555: Which Model is Better

Thinking about purchasing one of the Onkyo home theater models that were released in 2016 compare their performance, connectivity options and functionality. Is Onkyo TX-NR656 vs TX-NR555 more solid and powerful? Are the few minor improvements worth extra money?

Features

The common complains of the TX-NR555 model’s users are due to imperfection of the Wi-Fi option. Additionally, some services, for example, Pandora, Dolby Atmos or Chromecast often hang when starting. The HDMI signal can’t be synced on a cable and the firmware requires updating. Its sleep timer can be found somewhere within the menu, but not too fast or easily. Unfortunately, the TX-NR656 model is also slow, coming with the same Android app and Bluetooth issues. But its menu is more complete and user-friendly. Meanwhile, the AccuEQ auto calibration of both models is great, including an equalizer and a quick menu, getting adjusted to the room acoustic.

Connections

The TX-NR555 model comes with 6 HDMI inputs, but only 3 of them support HDCP 2.2. Among its basic drawbacks is absence of the Bluetooth output. Only the Bluetooth input is available. Onkyo TX-NR656 vs TX-NR555 is better in terms of connectivity, as it has 8 HDMI inputs and 2 outputs. The rear location of the USB connection of both home theaters is not a great inconvenience for most customers, but their phono inputs are very beneficial for the people that prefer vinyl records playing. Additionally, the remote that is the same for both models is intuitive, simplified. The buttons are large and not too numerous.

Performance

Onkyo TX-NR555 vs TX-NR656 is a bit less powerful versus its newer counterpart. As to the sound, it’s about the same. Their low-frequency performance is visceral, notable for deep bass (if you connect the performant, bi-amp speakers). However, the older model’s sound is a bit less detailed at high volumes versus the sound that Onkyo TX-NR656 amp produces. The low-frequency response is very good and powerful.

Conclusion

The TX-NR555 model lacks some HDMI inputs, being a bit less powerful and producing not very detailed sound at high frequencies and high volumes. Onkyo TX-NR656 home theater’s control app was upgraded and it sounds pretty good for movies, showing good dynamics, producing crisp and accurate dialogues.

Onkyo TX-NR555 Review

The 7.2 amplifier is feature-rich and user-friendly. Its menu is intuitive and smooth, but not complete, requiring upgrading, as some services hang when starting. So is the control app that is quite good, but not perfect. The ports are numerous, but only 3 of them are HDCP 2.2 compatible. USB connection is located on the rear side that is not too handy. However, the beneficial phono input is available. Additionally, the device produces accurate, powerful sound, that is not too detailed at high frequencies.

Pros:

  • easy to use
  • intuitive and simple remote
  • great audio performance

Cons:

  • common app and services issues
  • no Bluetooth output
  • not detailed sound at high frequencies

Onkyo TX-NR656 Review

The home theater is up-to-date, easy to set up and calibrate, coming with a quick menu and simplified remote. The app control are services are still a bit slow, sometimes connecting on the second or the third try. It has the generous number of ports that are commonly sufficient for the users. A phono input is available, allowing a turntable connection. The rear USB connection is not an issue for most people. Additionally, the amplifier produces great, crisp and dynamic sound that stands out by mellow bass and clear dialogue reproduction.

Pros:

  • detailed menu
  • upgraded app
  • great sound

Cons:

  • rear USB connection

Add receiver to compare
We didn't find anything to show here
Votes 1 1
Rating 5 5

Comparison chart

Common

Model

TX-NR656
TX-NR555

Brand

Onkyo
Onkyo

Rating on Amazon

4.0
4.0

Reviews on Amazon

255
255

Functions

Digital player

Internet radio

Network audio player

Amplifier class

Audio formats

AAC

AIFF

Apple lossless

DSD

FLAC

MP3

WAV

WMA

Built-in decoders

DTS neural:X

DTS-HD master audio

DTS:X

Dolby atmos

Dolby digital plus

Dolby surround

Dolby true HD

Power device

Operational power consumption

580 W
460 W

Standby power consumption

0.1 W
0.1 W

Built-in display

Type

fluorescent
fluorescent

Colour

black
black

Amplifier

Total output power

690 W
560 W

Output power per channel

100 W, 170 W
140 W, 80 W

Output impedance per channel

6 Ohm, 8 Ohm
6 Ohm, 8 Ohm

Frequency response

20 Hz-20 kHz
20 Hz-20 kHz

Total harmonic distortion

0.08 %
0.08 %

Number of channels

7
7

Signal-to-noise ratio

106 dB
106 dB

Connectivity interfaces

Bluetooth

Wi-Fi

IEEE 802.3

IEEE 802.3u

Signal processing

HDMI pass-through

up to 4K
up to 4K

Video conversion/scaling

Analog to HDMI up conversion

3D pass-through

Upscaling via HDMI

up to 4K
up to 4K

Connector type

AV inputs

2
2

Optical digital inputs

2
2

Coaxial digital inputs

1
1

HDMI inputs

8
6

HDMI outputs

2
1

Optical digital outputs

has not
has not

Coaxial digital outputs

has not
has not

Subwoofer outputs

2
2

USB

1
1

Phones

1
1

Media content source

Bluetooth

Network

USB-host

Radio

Tuner type

digital
digital

Tuner bands

AM/FM
AM/FM

Preset station qty

40
40

Additional features

A-B speaker switch

AIR Studios monitor certification

Three-zone capability

X.v.Color

Advanced sound retriever (ASR) technology

Apple air-play support

Audio return channel (ARC)

Bi-amplifying

Deep color

MCACC Pro

Auto power off

Pure direct mode

Dual-zone capability

Smartphone remote control

Sound features

Sound output mode

Surround Sound
Surround Sound

Audio D/A converter

32bit / 384kHz
32bit / 384kHz

Surround sound effects

Neural Surround. Theater-Dimensional Virtual Surround
Theater-Dimensional Virtual Surround

Surround system class

7.2 channel
7.2 channel

Digital sound processor (DSP)

DSP preset qty

4

Digital content protection

HDCP 2.2
has not

Clock

Built-in clock

has not

Sleep timer

has not

Dimensions

Shipping size

22.5 x 18 x 11 inches
22.5 x 18 x 11 inches

Product weight

22 pounds
22 pounds