Product Comparison: Onkyo TX-NR636 vs Onkyo TX-NR646


General Specifications
Brand
Onkyo
Onkyo
Model
TX-NR636
TX-NR646
Origin
Malaysia
Malaysia
About the Product
The TX-NR636 serves up revolutionary Dolby Atmos surround-sound complete with liquid 4K video at 60 frames per second. Dolby Atmos moves the sound around your theater more realistically to place you in the center of the action.
Experience the cutting edge of home cinema with the 7.2-channel TX-NR646 Network A/V Receiver, the first in its class to feature the revolutionary DTS:X™ and Dolby Atmos® multi-dimensional audio formats.
Key Specs
Number of Channels
7
7
Watts Per Channel RMS
95 Watts
100 Watts
Total Harmonic Distortion
0.08 %
0.08 %
Signal/Noise Ratio
106 dB
100 dB
What customers say about "Key Specs"
Onkyo TX-NR636 7.2-Ch Dolby Atmos Ready Network A/V Receiver w/ HDMI 2.0
  • The sound quality and channel separation are outstanding. It does everything! And very easy to set-up!
  • The power is rated 95 watts per channel and it seems to be about right.
  • It all comes down to clean sound at appropriate levels, and this will allow you to play things loud enough without distortion.
  • This is the third Onkyo receiver I have owned. I purchased it on the basis of the rock solid performance and dependability of the previous two I own, both of which still work flawlessly.
  • Its so loud it will run you outta the room. The speakers will start to break up and distort like crazy.
Onkyo TX-NR646 7.2-Channel Network A/V Receiver
  • Gets really loud and clear. Cant hear any distortion at high volume. It has very good channel separation.
  • The NR 646 has a rating of 0.08 at 100 Watts which compares well with other units in its price range.
  • The sound is awesome with no distortion. There is no real heat to speak of with previous Onkyo products.
  • The distortion at moderately loud volumes is wholly unacceptable.
  • Works great. More than adequate. I had to buy new receiver to accommodate my new 4K TV.
Size & Weight
Color
Black
Black
Height
6.83 in.
6.83 in.
Width
17.13 in.
17.13 in.
Depth
12.95 in.
12.95 in.
Weight
23.1 lbs.
20.7 lbs.
Features
Receiver Type
A/V Receiver
A/V Receiver
App-Controlled
Yes
Yes
Satellite Radio Tuner
Yes
Yes
Number Of FM Presets
40
40
Minimum Impedance
6 Ohms
6 Ohms
Frequency Response
20 - 20000 Hz
20 - 20000 Hz
Extras
Dolby Atmos, Full 4K Ultra HD Support, CinemaFILTER™, Double Bass Function, Pure Audio Mode, Smart Grid-Ready, Dolby TrueHD, Dolby Digital Plus, DTS-HD Master Audio, DTS-HD High Resolution Audio, DTS 96/24
Dolby Atmos, Dolby TrueHD, Dolby Digital Plus, Dolby Surround, DTS:X, DTS Neural:X, DTS-HD Master Audio, DTS-HD High Resolution Audio, DTS 96/24, Compressed Music Enhancer, Full 4K Ultra HD Support, CinemaFILTER™, Double Bass Function
What customers say about "Features"
Onkyo TX-NR636 7.2-Ch Dolby Atmos Ready Network A/V Receiver w/ HDMI 2.0
  • Has any easy to use App that I primarily use on my phone to control the unit. Happy overall.
  • The iOS app for the receiver has been very handy. We have our equipment out of sight in a closet and so it would have been a hassle to use the IR remote control.
  • The app works perfectly with my iPhone to control the receiver Luke selecting inputs, controlling volume, and sound settings, etc.
  • Excellent unit. Great app lets me play my music directly from my NAS. Excellent sound both music and for my home theater. Setup is a little complicated but really not bad.
  • The Android app itself consumes lots of data and power when streaming to it.
Onkyo TX-NR646 7.2-Channel Network A/V Receiver
  • I love the smartphone app over WiFi to control the unit, works great,can control receiver from pool and backyard.
  • It handles excellent with your smartphone whether they are streaming music or the onkyo App itself.
  • Onkyo phone app helps greatly and the zone 2 is awewesome, able to listen to separate components.
  • Also love its apps to stream music online. Works very well on wifi and ethernet.
  • Connecting with the Onkyo android app is bad. Permanent disconnection.
Connectivity
Speaker Connection Type
Screw
Screw
Ethernet Port(s)
Yes
Yes
Wireless Connection
Bluetooth, Wi-Fi
Bluetooth, Wi-Fi
Wireless Multi-Room Audio
Yes
Yes
Inputs
7x HDMI, USB, Component, 3x Composite, Digital Optical, 2x Digital Coaxial, 6x Analog Stereo RCA, Phono In, Mic 3.5mm, Remote control, Antenna, Ethernet
8x HDMI, USB, 2x Component, 3x Composite, 2x Digital Optical, Digital Coaxial, Mic 3.5mm, Remote control, Antenna, Ethernet, Bluetooth/wireless LAN antenna, Phono In, 7x Analog Stereo RCA
Outputs
2x HDMI, Component, Composite, 2x Subwoofer, Phones, 9x Speakers
2x HDMI, 2x Subwoofer, Phones, 9x Speakers
What customers say about "Connectivity"
Onkyo TX-NR636 7.2-Ch Dolby Atmos Ready Network A/V Receiver w/ HDMI 2.0
  • The sound is great compared to my old Sony. As of right now no problems with the HDMI outputs, but time will tell.
  • The connections in the back are separated enough to keep the cables comfortably apart.
  • This unit is the heart of my sound system, connecting various components to a central system.
  • It will not connect to wireless and when connected with a wired connection, cannot navigate to videos or audio that is not in a top level directory.
  • It can find and open connections to network connected PCs, but cannot see attached external drives.
Onkyo TX-NR646 7.2-Channel Network A/V Receiver
  • Also, the Bluetooth takes forever to connect, which was one of the main reasons I bought this.
  • Good receiver , simple connection process cables, easy handling, a bit simple application , excellent interaction with zone 2.
  • The Bluetooth does not work well. It worked on my old phone and would not connect to my new phone.
  • The only complaint is it wont connect with wifi. It does not see my wi-fi, I don’t know what to do with it.
  • Network card is defective. It would connect and lose connection after about 1 minute of play.
Warranty / Certifications
Manufacturer Warranty
2 year(s)
2 year(s)
Certifications
CE, FCC
CE, FCC
Other Information
Manufacturer

Price History


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