I went from a playbar to the arc and noticed a major difference, so I would assume you would. 

Easy enough to find 15% off codes as well and grab it for £679. 

@Nizzy Whether or not you will be “blown away” by the difference is largely dependent on your TV and its ability to pass through higher quality audio like Dolby Digital Plus, Dolby TrueHD, Dolby Atmos, or multichannel PCM. What model TV do you have? Do you use any external media devices?

Firstly thank you for replying so quickly.

I have a year old Samsung 50inch TV but my sonos is connected to to my sky q box which supports atmos. 

Which specific model is your Samsung? Is it equipped with HDMI eARC?

Not sure about the model but yes it has hdmi.

Wouldn't the arc run though the sky box via hdmi or optical??? 

Arc uses hdmi into the TV, then sky box into another hdmi port on the TV. To get full lossless dolby Atmos you require earc however. 

Can you try find your TV model. Will be on the about settings in the menu or on the back of the TV. 

Samsung 7 series 50

Absolutely not. The connection on the Arc is compatible with eARC and HDMI-ARC. Usually these are on TVs only. An HDMI connection from Sky box to Arc would produce silence.

 I'm taking a guess that it's a Samsung UE50TU7100K. Ideally still need the full model, but if it is that one, then yes your TV supports earc and yes would be a big difference to the playbase. 

Found it.

Model ue50ru747qu

Yeah, don't think that model supports Earc and just has a normal arc port. 

Unless you are going to use a Blu-ray player or ripped mkvs etc, you won't be able to get Dolby Atmos - True HD (uncompressed). You will be able to get Dolby Atmos - DD+ (compressed) audio. 

Thank you for your help

To clarify, your TV should be able to play Dolby Atmos/Dolby Digital Plus audio from some of the TV’s native apps like Netflix and Prime Video, but it may or may not pass through Dolby Atmos audio from an external media device like the Skybox. Regardless, you should be pleased with the improved audio you will get with the Arc connected to your Samsung TV.

Hello my friend.

On the q box you can change the sound settings to dd/atmos wouldn't that help.

I'm nearly 50 years old so I'm not clued up enough now

Yeah, it will work, just make sure the Sonos Arc, plugs into your arc port on the Samsung, then the Sky box is plugged into another hdmi port. Then set digital audio output hdmi to Dolby digital plus. As long as you have a UHD subscription, you will then be able to get Dolby Atmos through the sky q box. 

Great thank you very much.

My wife is going to kill me now