Project Debut Pro Turntable set up

@Alex Rowbottom 

I‘m confused by „the port is hard wired to the beam“. Why so and how did you realize that?

It‘s not necessary and no way of systems design use. The incoming audio to port should be transmitted via network to any Sonos room of your system. For that you also would be able to set the beams room via autoplay as the standard room. 
Am I wright, that you did some conversion of the ports didital output from coax to optical and use this via beams optical adapter? That really would be a crazy thing even if it works and you get a signal on the beam in tv mode. Is there no tv connected to th beam?

Might be I completely misunderstood this… if so, please explain to me how it was meant. 
 

Ok, going on to your next point… imho both alternatives are possible. But if you are planning to use your phono with a high end amp, I definitely recommend connecting the phono directly to the amp and connecting the amps pre out to ports line in. Ports line out (analogue or digital) can be connected to any input of the amp. This way you are able to use the high end solution with single use of phono and amp or the Sonos integrated solution. 

@Schlumpf

i may be calling it the wrong thing with it called hard wired I do apologise! The port is connected to the beam via Ethernet and then the beam connected to the TV via hdmi. 
But being honest i rarely watch tv and mainly use the Sonos system for music. 
 

So as it stands as I’m currently looking at it all. I have the turntable into the phono box on input then the output connected to the Sonos port input. 

The Sonos port has the arcam connected to the output and the rca cable is then connected to the amplifier on analogue 1. 

I’m presuming I have connected it all up wrong which could be the case! As this is my first hifi amp. 
 

With this though there is no audible difference. 

@Alex Rowbottom 

Ok, now I got what you meant by „hard wired“… but also that way of a direct lan connection between port and beam is not recommended by Sonos. You should connect the devices wireless or each lan cabled to the router, an access point or a compatible ethernet switch. 
 

And of course you can do the audio cable connection as you described, but be aware that you always use the ad and da converter of the port and the external phono pre amp. 
Using high end amplifier and speakers this imho will cause a loose of quality. Therefor I would prefer connecting the phono directly to the amps phone input. 

@Schlumpf apologies for getting the phrasing incorrect.

so would you suggest that it’d be better to connect the turntable to the amplifier with out the phono box? 
if so I’m presuming connection would be turntable to phono and then rca in phono out to Sonos port? 
 

For an analog connection you would want to hook the Port output to a line-level input on your amp.

The coax connection to the amp is an option too and would likely be cleaner.

As to which phono connection options sound better, you’d need to try the various options but it is likely your phono preamp is going to be fine. If you do use the amp’s Phono you’d connect the amp’s Pre-Out to the Port to get the phono’s audio into the Sonos system and that might be a bit aggravating due to the amp’s volume control.

@Alex Rowbottom

Yes, like @Stanley_4 said is the way I also described before. In the end you have to decide which way is the better one for you. For myself with high end products I would prefer the direct connection between turntable and amplifier because of the told reasons. But maybe with your setup (or ears… 😉) you will hear no difference…