Onkyo TX-NR646 7.2-Channel Home Theater Receiver with Bluetooth (NO REMOTE)

Onkyo TX-NR646 7.2-Channel Home Theater Receiver with Bluetooth (NO REMOTE)


Jeff Got scammed a few times - Luckily he found SpenCertified!

The Onkyo TX-NR646 is a game changer. This receiver is the definition of versatile: it has support for 7.2 channels, built-in Wi-Fi & Bluetooth, and full support for 4K Ultra HD video content. Plus, the TX-NR646’s high-grade 384 kHz/32-bit AKM DAC not only brings movies to life, but your Hi-Res and streamed music as well. Uniquely, this modern receiver even has a phono hookup for your turntable! So for a receiver the whole family will love, you'll want the Onkyo TX-NR646.


SPENCERTIFIED- Fully certified by Spencer

Refurbished and SPENCERTIFIED

Every function has been confirmed 100% working. We have cleaned it inside and out and replaced any worn parts. A recap was performed if necessary. All pots, knobs, connectors and boards have been cleaned with CRC cleaner.

Cosmetic Condition: Very Good.

Functional Condition: Very Good.


  • Onkyo TX-NR646 7.2-Channel Home Theater Receiver with Bluetooth
  • Audio/Video Cables

Other information about the Onkyo TXNR646

  • 7-channel amplifier
  • 100 watts per channel into 8 ohms (20-20,000 Hz) at .08% THD, with 2 channels driven
  • Dolby and DTS surround sound decoding
    • Dolby Atmos processing for use with in-ceiling or "height" speakers for more enveloping surround sound
    • DTS:X for an immersive, 3-dimensional soundstage
  • Built-in Wi-Fi for listening to music from a networked PC, free Internet radio, and music services
    • Includes support for Pandora, Spotify, SiriusXM, Slacker, TuneIn, and Aupeo! (subscription required for some services)
  • Built-in Bluetooth for wireless music streaming from a compatible smartphone, tablet, or computer
  • Apple AirPlay for streaming music from an iPhone®, iPad®, iPod touch®, or computer running iTunes
  • DLNA-certified for streaming music with compatible devices and computers
  • Plays high-resolution digital music files via USB storage device or a networked computer (up to 24-bit/192kHz resolution)
  • Plays DSD files (up to 5.6 MHz .dsf files) from network and USB storage devices
  • Dual-room/dual-source output
    • High-current amplifier design with large power transformer
    • 32-bit/384kHz Asahi Kasei AK4458 digital-to-analog converter for clear sound from digital sources
    • Music Optimizer function enhances the sound quality of compressed music files and Bluetooth streams
    • Bi-amp capability with compatible front speakers by reassigning "surround back" channels
    • Free Onkyo Remote app lets you use your smart phone as a Wi-Fi remote
    • 4K/60p and 3D video pass-through
    • HDMI standby pass-through allows access to all HDMI connected devices without having to power on the receiver
    • Audio Return Channel function receives digital audio signals from a compatible TV's tuner via HDMI
    • Phase-Matching Bass optimizes low frequencies to preserve clarity with vocals and movie dialogue
    • 40 AM/FM presets


    • 17.13" x 13.63" x 6.75" (Length x Width x Height)
      • 9.25" height with Bluetooth antennas raised
    • Weight: 20.7 lbs


    • Setup Mic x1 (back)
    • HDMI x8 (front and back)
    • USB x1 (back)
    • Ethernet x1 (back)
    • RI Remote Control x1 (back)
    • Optical x2 (back)
    • Coaxial x1 (back)
    • AM Tuner x1 (back)
    • FM Tuner x1 (back)
    • Component x2 (back)
    • Composite AV x3 (back)
    • Phono L/R x1 (back)
    • Analog Audio L/R x4 (back)


    • Headphones Jack x1 (front)
    • HDMI x2 (back)
    • Zone 2 Line Out L/R x1 (back)
    • Subwoofer Pre Out x1 (back)
    • Front Speakers R/L (Banana Plugs) x1 (back)
    • Center Speaker (Banana Plugs) x1 (back)
    • Surround Speakers R/L (Banana Plugs) x1 (back)
    • Back or Height Speakers R/L (Banana Plugs) x1 (back)
    • Zone 2 Speakers R/L (Banana Plugs) x1 (back)


    • Made in Malaysia

    Customer Reviews

    Edward W.

    Customer Since December 2017

    I have always been impressed with the items I received even after a couple years they continue to work. This is the reason why I always keep returning as a customer.

    Alexander W.

    Customer Since March 2018

    For the price I paid the quality was great and I use my 400 Disc cd changer everyday.


    Customer Since July 2018

    Very happy with what we got! I made the mistake of first getting this item from Amazon and received it not working at all... I will order from them again and highly recommend them to everyone!

    John D

    Customer Since August 2018

    For a couple of years, I have been looking for a replacement for my Toshiba DVD Recorder that was starting to break down. I had placed four orders with Amazon....3 of the recorders did not work and had to be returned, the fourth order was canceled by the seller before shipping with no explanation. An internet search brought me to spencertified.com and I found a refurbished Toshiba recorder similar to the one I was using. Without high expectations, I placed another order with them. SpenCertified let me know when my order was placed and kept me fully updated during the shipping process. The recorder arrived in about 4 days (much quicker than I anticipated) and works perfectly. The box included the recorder, remote and users' manual and advertised. I am very satisfied with my experience with SpenCertified and plan to order additional equipment from them. I highly recommend them.


    Customer Since May 2020

    I was totally amazed with the speed of delivery for my order. Ordered on May 4 and received on May 8! It was very thoughtful of them to email me to offer assistance and to ensure I was happy with my purchase. Great Job!

    Jan S

    Customer Since March 2018

    Being a senior who refuses to give up VCR'S, I was in a panic because my last one died and no one sells them anymore in CA. Luckily I discovered SpenCertified, and will never have to worry again. I can't begin to tell you how pleased I am with the fantastic service they provide. My sets arrived in a timely manner, extremely well wrapped and the friendly emails offering any help were appreciated. I will continue to do business with them in the future and plan to refer them to all my friends. Thank you, guys... YOU CAN BUY WITH CONFIDENCE.

    Evelyn S.

    Customer Since March 2018

    When my beloved VCR died, I discovered new ones were not being manufactured as before. All my tapes, collected over many years - - lost!? All future recordings - - lost!? What to do? Then, I discovered SpenCertified. I was wary. Was this a scam? I was afraid. Would my purchase truly be guaranteed? I wanted, I NEEDED, a working VCR, so I made my order. The packaging was perfect, the VCR was even better than advertised, Spencer was extremely helpful. I am a very satisfied customer. 


    Customer Since June 2018

    I just got my vhs dvd player in the mail. I was so impressed how well they kept me informed about it. When i got it it was well packaged no problems. We hooked it up and works great. Thank you so much will do buisness again.

    Clifford Escover

    Customer Since May 2019

    I searched the stores and then the web looking for a Bluray player w/ HDMI & RCA audio outputs ; they hadn’t made them in years Was quite a search ... then I found SpenCertified .. I purchased a refurbished LG BD 300, it came with all cables,owners manual and remote 😂😂 with batteries ! And looks brand new !I am extremely pleased. Highly recommend and we will be purchasing again when we need to find a hard to get item.