Try removing the phono preamp and setting the Audio Delay setting in the Sonos app to Max. Also set the Audio Compression setting in the Sonos app to Automatic or Compressed.

Thanks so much for the quick response.

Unfortunately, the delay is still the same. I'm starting to get the impression that the Port is not built to play simultaneously through Sonos and Line Out, despite the presence of there being a Line Out.

Has anyone gotten this to work?

There is 75ms minimum latency between a SONOS Line-In and Line-Out -- regardless of the SONOS model.

So have I misunderstood the purpose of the Port? Is simultaneous play between third-party speakers and Sonos not possible?

PORT Integrates a traditional source with a SONOS system.

If it is possible to simultaneously hear a SONOS Line-In based source and a the same source directly connected to a traditional analog system, then SONOS is not appropriate. If the rooms are isolated from each other, no one will notice the 75ms offset.

Ah, well, I'm in an apartment so nothing is completely isolated...

@Krummbum I wonder if the Marshall is creating the added delay. Is the Marshall more delayed than the Sonos speakers? Do you have any other third-party powered speakers that you can test with the Port?

You may be able to re-think things. If PORT is the only source of audio and there are no active SONOS speakers, this would be no different than using a CD player as the source. If you are playing ancient CD’s an additional 75ms is insignificant.

@GuitarSuperstar I looks like the the Marshall is behind so the likely culprit. Unfortunately, I don't have any passive l speakers with a Line-In to test. I suppose I could purchase some RCA converters to hook up some speaker wire.

@buzz Yeah, I'm gonna have to consider another option here. I like my Marshall, but would also like some Multi-room capabilities with my turntable.

I apologize. I meant “do you have any other third-party POWERED speakers to test”.

Ah, ok. Tested with other speakers and they were okay. So strange the Marshall would create a delay with an RCA or Aux input.

Thanks for all your help!

If the Marshall offers digital processing, this could introduce latency.

As an update, I ended up purchasing a RCA piggyback cable doing the following:

AT-LP120XUSB »

Rega Phono Mini A2D V2 »

Marshall Stanmore II Voice »

Piggyback »

Sonos Port

I then set-up the Audio Delay for the Port to be 150 ms. It’s sounding good.

Hi All, I know this is a year old already but I’ve been having the same problem. I don't have quite as many parts. My set up gos from:

Record Player (Vintage Thorens) »

Pioneer A-70DA Phono ports »

Out of Pioneer using RCA Output Ports »

Sonos Connect RCA input

I managed to change the delay to 75ms but there’s still a slight delay and as we have an open plan house and have the speakers at either end of a big room it is noticeable.

Any ideas?

I ended up getting a splitter that goes from my third-party speaker to the port. That way the signal goes to the third-party first, the third party does its internal delay business, and the signal comes out (post-delay) and goes to port which sends it to the rest of the home.

It’s got its own quirks to it but it’s working.

I’d try that except the record player requires an amp otherwise the volume is very low. I was using the same player as you but was gifted this Thorens player which is pretty sweet and I reckon sounds a lot better but might be a pain if I can't get rid of the lag.

I'm still using my preamp:

AT-LP120XUSB »

Rega Phono Mini A2D V2 »

Marshall Stanmore II Voice»

Sonos Port »