Pro-Ject Debut Carbon Turntable in Walnut (Sonos Edition)

You can use an RCA-Y cable to share the turntable output. Note, however, there will be a 75ms time offset between SONOS and your traditional setup.

You will want to use the turntable's internal phono-preamp and connect it to a Line-In connector (not the Phono) on your traditional setup.

You don't want two phono amplification/equalization stages in the signal path.

Just a slight correction regarding using the Pro-Ject Debut Carbon Turntable’s internal Pre-Amp. I have the same turntable in Black. The Internal Pre-Amp can be disabled to allow you to use the Phono-Amp input on your traditional setup. I have the internal pre-amp disabled in favor of a Cambridge Alva Duo pre-amp.

I would purchase a Sonos Port and connect it to Tape-in/Tape-out to send turntable music to other Sonos speakers. 

Yes that will work if not using a Y cable, with the Y, the internal preamp (or an external one) is needed as Sonos doesn't offer a phono level input.

Aside from that, splitting the phono level connection will present a load to the cartridge that may be a problem.

Thanks. I have an old port set up linked to a CD player in my studio. I’ll give that a try as well.

A question on the Pro-Ject Debut Carbon’s pre amp. To disable the pre-amp is that provided for with a switch or is it more complicated than that? Thanks

See the switch location in the picture and explanation:

Thanks! Very helpful and a different response from the SONOS on-line chat support.

You might consider one of the Victrola Stream models. I added an Onyx to my setup and streaming over WiFi actually sounds better than a wired connection to an amp/speakers. I think that’s mainly due to having the surrounds in my setup set to full (vice ambient), which makes 2-channel sound more immersive. I also have really good WiFi so I assume it’s achieving FLAC. I additionally have the Onyx paired to my Ace and that’s a pleasant listening experience, as well. They both have Bluetooth 5.4 for lossless audio.

I have the Onyx as well, and it works great, both using my speakers and bluetooth to my ACE.  I agree with you about streaming over WIFI vs Line in to my Port.  Wifi streaming sounds much better, probably due to the quality of the pre amp in the Onyx.  I would like to add an external pre amp, but the native one in the Onyx can’t be bypassed to my knowledge.