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Common
Model
TX-NR646
TX-NR545
Brand
Onkyo
Onkyo
Rating on Amazon
3.7
3.7
Reviews on Amazon
397
99
Functions
Digital player
Internet radio
Network audio player
Amplifier class
D
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
Power consumption cperational. Watt
360
380
Power consumption stand by, Watt
0,1
0,1
Built-in display
Type
fluorescent
fluorescent
Colour
black
black
Amplifier
Output power /total. Watt
580
180
Output power / channel
100 Watt. 170 Watt
115 Watts. 65 Watt
Output Impedance / channel
Frequency response
20 - 20000 kHz. at 1 kHz
20 - 20000 kHz. at 1 kHz
Total harmonic distortion (THD)
0.08 %. 0.9 %
0.7 %. 0.9 %
Channel qty
1,2
7,1
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
HDMI to HDMI scaling, analog to HDMI up conversion
3D pass-through
has not
Upscaling via HDMI
has not
has not
Connector Type
19 pin HDMI type A
RCA x 2
RCA x 3
RJ-45
TOSLINK
Banana/spade x 2
Click-fit x 2
Mini-phone 3.5 mm
Phone stereo 6.3 mm
4 pin USB Type A
9 pin D-Sub
F connector
RCA
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 controlled
Sound features
Sound output mode
Surround Sound
Surround Sound
Audio D/A converter
32bit / 384kHz
32bit / 384kHz
Surround sound effects
Theater-Dimensional Virtual Surround
Theater-Dimensional Virtual Surround
Surround system class
7.2 channel
7.2 channel
Digital sound processor (DSP)
DSP preset qty
6
26
Digital content protection
has not
HDCP 2.2
Clock
Built-in clock
Sleep timer
has not
Dimensions
Shipping size
12.9 x 17.1 x 6.8 inches
12.9 x 17.1 x 6.8 inches
Product weight
20.7 pounds
19 pounds
Amplifier
Output Impedance / сhannel
6 Ohm. 8 Ohm
6 Ohms
AV receivers comparison rating
- 39.5Onkyo TX-NR646
- 32Onkyo TX-NR545
The best receiver is Onkyo TX-NR646. Check Onkyo TX-NR646 price on Amazon
