Onkyo TXNR646 (Black) Atmos AV Receiver

Onkyo TXNR646 (Black)

Atmos AV Receiver

Out of stock

Unfortunately this product is no longer available.

For advice on an alternative product or details of newer ranges, please contact Telesales here or your local store which you can find here.

Phil, Telesales Manager, 15th year of service

Check out what has to be the home cinema sensation of the year! The Onkyo TXNR646 is the first affordable AV receiver equipped with both DTS:X and Dolby Atmos and truly ahead of its time.

Introducing DTS:X

DTS:X is the flagship processor from this highly respected tech company and literally pushes the boundaries of what you can expect from home cinema. This highly sophisticated processor renders images in three dimensions that conventional processing can't match. It also offers other advantages such as the ability to boost the spatial effect of conventional DTS and easily adapts with your existing speaker configuration.

Engineered for Dolby Atmos sound
Optimised for Dolby Atmos, you can be amongst the first to experience the wonder of Dolby Atmos in your own home. Producing a multi-dimensional and totally immersive sound, Dolby Atmos has been hailed as the greatest advance in surround sound for 20 years - so don't miss out!

A powerful performer
Making sure you feel the full impact of DTS:X and Atmos, the Onkyo TX-NR646 boasts a powerful 100w per channel amplifier . The high current design with WRAT (Wide Range Amplifier Technology) and discrete circuitry easily sustains powerful but testing dynamics such as explosions and intense action scenes.

High Resolution sound
As well as offering multi-dimensional surround sound, the Onkyo TXNR646 is compatible with High-Resolution Audio. This gives the highest sound quality, that's far more natural sounding than standard audio. The premium 384kHz/32-bit DAC is compatible with a wide range of HD audio formats, including DSD 5.6 MHz and FLAC 192kHz-24-bit for exceptional sound quality.

Wi-Fi with Spotify and AirPlay
Connect via Ethernet or wi-fi to your home network and gain access to a whole new world of entertainment. From here you'll be able to access a massive range of Internet radio stations plus music services such as the hugely popular Spotify and Deezer. New to this year's model is the introduction of AirPlay, making it easier than ever to stream from your Apple iOS devices, too.

Stream music from your mobile with Bluetooth
With a Bluetooth receiver built in, it's easy to enjoy your music from other devices. Pair with your smartphone, tablet, laptop or PC and wirelessly stream all your favourite music. With the possibility of streaming music services, such as Spotify, Deezer and Tidal, as well as your own music library, you get access to near unlimited music! Advanced Music Optimiser improves the dynamic response from compressed music sources, adding 'sparkle' to the sound and restoring the sound quality.

The latest connections
As you'd expect from this leading AV brand, the TXNR646 comes with the latest connectivity. The TXNR646 features the latest HDMI 2.0a connections and supports HDCP 2.2, which means you can stream UltraHD video and that it's ready for the next generation of 4K discs. With twin HDMI outputs you can also have a second AV display in another room.

Take a listen to just how far home cinema has come in the past few years. With the DTS:X and Dolby Atmos-equipped Onkyo TXNR646 home cinema has never sounded so real.

Click here for link to our blog review

6 Year Guarantee
£9.99 Fully refundable if unused

Add our 6 Year Guarantee to your basket when you check out. We'll cover your items for 6 years and give you your money back if unused.

Lowest price guaranteed!

We’ll beat any genuine advertised price, even from the web & give you up to £100!

We're confident that our prices are amongst the very keenest out there, so we've made it as easy as pie to qualify for our Price Beat. Richer Sounds also guarantees to beat web prices, and Price Beat is even valid for 14 days after purchase, so if you've seen a cheaper price, let us know, and we'll happily beat that price by up to £100!

Products must be brand new, boxed, carry a comparable guarantee and be in stock at time of purchase. Richer Sounds price used to compare will be net of any voucher / trade in discounts.
T&Cs apply

Buy now, pay later available
by phone, on items over £500

We offer 6 month interest free options. Call your local store or our Telesales team for details

For purchases over £500, pay a 10% deposit now and the balance in 6 months. Pay the balance in full before the end of the 6 months and there is no interest to pay whatsoever, just a one-off settlement fee of £29. Subject to application, financial circumstances and borrowing history. Ts&Cs apply. 19.9% APR representative. Find out more

 Disabled assistance

All products that are available to purchase on the Richer Sounds website can be delivered free to blind, partially sighted or those with a disability.

Please contact web after sales for more info.
For delivery of in-store only deals, please contact your local store for more details.
T&Cs apply - see our delivery page.
Check out what has to be the home cinema sensation of the year! The Onkyo TXNR646 is the first affordable AV receiver equipped with both DTS:X and Dolby Atmos and truly ahead of its time.

Introducing DTS:X

DTS:X is the flagship processor from this highly respected tech company and literally pushes the boundaries of what you can expect from home cinema. This highly sophisticated processor renders images in three dimensions that conventional processing can't match. It also offers other advantages such as the ability to boost the spatial effect of conventional DTS and easily adapts with your existing speaker configuration.

Engineered for Dolby Atmos sound
Optimised for Dolby Atmos, you can be amongst the first to experience the wonder of Dolby Atmos in your own home. Producing a multi-dimensional and totally immersive sound, Dolby Atmos has been hailed as the greatest advance in surround sound for 20 years - so don't miss out!

A powerful performer
Making sure you feel the full impact of DTS:X and Atmos, the Onkyo TX-NR646 boasts a powerful 100w per channel amplifier . The high current design with WRAT (Wide Range Amplifier Technology) and discrete circuitry easily sustains powerful but testing dynamics such as explosions and intense action scenes.

High Resolution sound
As well as offering multi-dimensional surround sound, the Onkyo TXNR646 is compatible with High-Resolution Audio. This gives the highest sound quality, that's far more natural sounding than standard audio. The premium 384kHz/32-bit DAC is compatible with a wide range of HD audio formats, including DSD 5.6 MHz and FLAC 192kHz-24-bit for exceptional sound quality.

Wi-Fi with Spotify and AirPlay
Connect via Ethernet or wi-fi to your home network and gain access to a whole new world of entertainment. From here you'll be able to access a massive range of Internet radio stations plus music services such as the hugely popular Spotify and Deezer. New to this year's model is the introduction of AirPlay, making it easier than ever to stream from your Apple iOS devices, too.

Stream music from your mobile with Bluetooth
With a Bluetooth receiver built in, it's easy to enjoy your music from other devices. Pair with your smartphone, tablet, laptop or PC and wirelessly stream all your favourite music. With the possibility of streaming music services, such as Spotify, Deezer and Tidal, as well as your own music library, you get access to near unlimited music! Advanced Music Optimiser improves the dynamic response from compressed music sources, adding 'sparkle' to the sound and restoring the sound quality.

The latest connections
As you'd expect from this leading AV brand, the TXNR646 comes with the latest connectivity. The TXNR646 features the latest HDMI 2.0a connections and supports HDCP 2.2, which means you can stream UltraHD video and that it's ready for the next generation of 4K discs. With twin HDMI outputs you can also have a second AV display in another room.

Take a listen to just how far home cinema has come in the past few years. With the DTS:X and Dolby Atmos-equipped Onkyo TXNR646 home cinema has never sounded so real.

Click here for link to our blog review
Brand Onkyo
Colour Black
Dimensions WxHxD (mm) 32.9 x 43.5 x 17.4
Channels 5.1.2
Power Output - Watts per CH 160 x 7
Dolby ProLogic Surround Dolby Surround
DTS Yes
DTS-HD Yes
DTS:X Yes
HDMI Audio Yes
HDMI 8 in/2 out
USB 1
Component 2 in
Multi Channel Input Yes
Coaxial Inputs 1
Coaxial Outputs No
Optical Inputs 2
Optical Outputs No
Active Subwoofer Output Yes
Audio Inputs 4
DLNA Compliant Yes
Wireless Connection Yes
Internet Radio Services Yes
Multiroom No
Power Consumption - Standby 0.15
Power Consumption- Normal Use 630
Tuner Radio FM/AM
Remote Control Yes
App Control Yes - iOS and Android
Dimensions WxDxH (mm) 435 x 329 x 173.5
Weight (KG) 9.4
Apple AirPlay Yes
Bluetooth Yes
HDMI Zone Out Yes
NFC No
Dolby Atmos Yes
Phono Input Yes - MM
Rated 5 out of 5 by from Absolutely Another Richer Sounds Bargain Hello All, 4k TV HDR and This ONKYO TXNR646 with HDR !!! HDR people !!! All the features you need to get things running, Tweak here and there. So happy I got this, The Team @ Chelsea You Rock !! Took call at 10am on a Sunday !!!!!! 11am In the car,, 12 noon already running like a champ. Bless you all and your hard work. I mean I know have Dolby Atmos ;-) Now registered for other Gems and may be who knows, OLED ???? Amazing
Date published: 2017-06-18
Rated 5 out of 5 by from Awesome Amp I bought this as an upgrade from TX-616 and what an upgrade it is. Yes the on screen interface is very basic, but the amp more than makes up for it. The bluetooth, feature is excellent and easy to sync your phone to. The sound output for me was alot louder and crisper through the 7.1 channels than on the 616. Having Dolby Atmos onboard as well is a nice bonus. Overall its a quality amp and for the £300 price tag with 6 year warranty it was a bargain! Highly recommended.
Date published: 2016-08-09
Rated 5 out of 5 by from Good product Product is easy to use, has the hdmi 2.2 connections and has Dolby atmos. For the price does everything you would want.
Date published: 2016-08-07
Rated 5 out of 5 by from Excellent AV Amp loads of features for a great price This is a great piece of AV kit for a great price. The sound quality is excellent, connectivity covers everything I need and more. Both wifi and ethernet available, easy access to streaming music services, internet radio and music on the local network (mainly flac) Apart from the sound collect and connectivity I like the fact it just works seamlessly with the TV without any hassle.
Date published: 2016-08-03
Rated 5 out of 5 by from great product nothing more to say Good with Dolby Dand was bought for the Bluetooth feature which is great 9/10 great value
Date published: 2016-08-02
Rated 5 out of 5 by from Well set out easy set up The onkyo txnr646 is a dream rite out of the box, easy to set up more of every thing than you ever need and I think it will be giving out surprises weeks after you've had it .I haven't had so much fun with a peace of hardware for a long time, bring on the atmos movies :))
Date published: 2016-07-16
Rated 3 out of 5 by from Must try Harder To start to sound is good...Got it to give Atmos a try..Found the menu to be very old style..last amp had good graphics and would tell you on front display what channels running,type of input etc... This model disapoints on the user front..First Onkyo but not impressed . If you upgrade becouse you love your sound then you will be happy but if you upgrade from your current amp and was happy with it you will be disapointed..
Date published: 2016-07-11
Rated 5 out of 5 by from Astonishing value packed with features As always, the Richer Sound staff did a terrific job providing impeccable advice and service that you don't get anywhere else. Passionate yet impartial advice without an ounce of 'pressure-sell' that your team consistently provides means I'd never go anywhere else and keep coming back for more! About the unit: I needed to replace an old Arcam AVR300 and was never expecting a replacement in this price bracket to sound even remotely close however seems I was wrong. Whilst obvious differences audibly with music, movies are on a different level with the Onkyo. Simple to set up and tweak to get the best from the unit to suit your environment and needs, this AVR provides clarity and punch.
Date published: 2016-06-25
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Unfortunately this product is no longer available.

For advice on an alternative product or details of newer ranges, please contact Telesales here or your local store which you can find here.

Phil, Telesales Manager, 15th year of service

Onkyo TXNR646 (Black) is rated 4.7 out of 5 by 75.
  • y_2021, m_2, d_24, h_17
  • bvseo_bulk, prod_bvrr, vn_bulk_3.0.14
  • cp_1, bvpage1
  • co_hasreviews, tv_0, tr_75
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  • bvseo_sdk, p_sdk, 3.2.1
  • CLOUD, getAggregateRating, 6.73ms
  • REVIEWS, PRODUCT

6 Year Guarantee
£9.99 Fully refundable if unused

Add our 6 Year Guarantee to your basket when you check out. We'll cover your items for 6 years and give you your money back if unused.

Fully refundable if unused

6 YEAR GUARANTEE COSTS JUST £9.99 ON ALL ITEMS UNDER £100, OR 10% OF PURCHASE PRICE ON ANYTHING OVER £100.

We think you’ll agree that our 6 Year Guarantee offers fantastic value. What’s more, if you don’t use it in the 6 year period, we’ll refund the cost of it. You really can’t say fairer than that!
Plus, if we can't fix a fault, we will give you a replacement.
Find out full details here.

Lowest price guaranteed!

We’ll beat any genuine advertised price, even from the web & give you up to £100!

We're confident that our prices are amongst the very keenest out there, so we've made it as easy as pie to qualify for our Price Beat. Richer Sounds also guarantees to beat web prices, and Price Beat is even valid for 14 days after purchase, so if you've seen a cheaper price, let us know, and we'll happily beat that price by up to £100!

Products must be brand new, boxed, carry a comparable guarantee and be in stock at time of purchase. Richer Sounds price used to compare will be net of any voucher / trade in discounts.
T&Cs apply

Buy now, pay later available
by phone, on items over £500

We offer 6 month interest free options. Call your local store or our Telesales team for details

For purchases over £500, pay a 10% deposit now and the balance in 6 months. Pay the balance in full before the end of the 6 months and there is no interest to pay whatsoever, just a one-off settlement fee of £29. Subject to application, financial circumstances and borrowing history. Ts&Cs apply. 19.9% APR representative. Find out more

 Disabled assistance

All products that are available to purchase on the Richer Sounds website can be delivered free to blind, partially sighted or those with a disability.

Please contact web after sales for more info.
For delivery of in-store only deals, please contact your local store for more details.
T&Cs apply - see our delivery page.