Interesting problem with Amp and turntable

Tried this in many different combinations with my one SLs (stereo and individually), Beam Gen 1 in another room and my neighbours Era 100. The one SLs just gave me distortion and a faint hint at the audio from the turntable. The era 100 sounded much more high pitched than the arc but no distortion. The fact that they all sounded so different smells fishy... 

I just assumed it was sort of pin to pin and the respective devices handle the rest... interesting.

Depending on which SONOS USB adapter you use, the adapter will also support an Ethernet connection.

Update:

I now have a pair of bookshelf speakers hooked up to the Amp and the turntable (plus preamp) to line-in on the Amp. As I suspected they sound totally fine. 

I am still getting the same poor sound quality when playing the turntable on the Arc and Beam in another room. Just adding the speakers seems to have magically fixed the issue when I send it to my One SLs, but this only when they are paired in stereo. If I separate the One SLs I get static and no audio when trying to play the turntable on either of them.

In short, it's all messed up and I suspect it is a network issue. Desperately in need of help/ideas because this is sort of the main reason I bought the Amp.

Hi

Vintage TT can different things to different people. What brand is the TT.  Also important to note is the type of cartridge being used MM (Moving Magnet) or MC (Moving Coil). The later is more finicky although produces a better sound. Below is a link that explains the difference.

Your pre-amp should have a setting to MM or MC. Make sure it’s set correctly.

https://sumikophonocartridges.com/turntable-cartridge-types/

As I mentioned above, network issues can cause intermittent, and missing sound, not distortion. Cartridge miswiring can result in some of your observations. Speakers close together or a mono Room will exhibit more symptoms and headphones less symptoms of the type you are describing if they are due to cartridge miswiring. It’s very easy to check the wiring and this would be my first step If I had your symptoms. Since this is a vintage turntable, the miswiring could have occurred decades ago.

If this is a MM/MC spat, all attempts at playing would be equally effected.

Do things improve if all of these other Sonos speakers are placed in the same room - as a test - as the Sonos Amp that is delivering the complete signal to the passive speakers?

Of course, if there is a network issue it will manifest itself as stuttering or no music and not as poor sound quality. As said by others here.

@Kumar 

Actually yes. The One SLs, which sound fine are in the same room, but they only work when paired in stereo. The Beam sounds quite bad and is in another room. An Era 100 is in the furthest room and seemingly consequently, sounds the worst.

The thing is, my router is not in the same room (it's actually right beside the Beam), so how is distance relevant?

Also my Arc is in the same room as the Amp and it doesn't sound the same as the passive speakers. 

I have confirmed it is an MM cartridge and that my preamp is configured accordingly. But do you have another example of how it could be "miswired"? Do you mean in the turntable itself? Because I'm pretty sure that from the phono out to the Amp, it's wired correctly.

Last point first - Speakers sound different from each other; each has a sonic signature.

The distance is relevant because the other Sonos speakers are getting the sound from the turntable wirelessly from the Sonos Amp, not from the router.

As to the One SLs - if they sound fine getting the turntable signals wirelessly from the Sonos Amp, proof of concept of the turntable as a viable source to other than the passive speakers wired to the Amp, has been established.

Moving on:

I see no reason why the One SL should work only when paired in stereo. The typical problem is reversed - a single One will work fine, but when stereo paired, the other speaker in the pair may either not work, or may stutter. I don’t know how this is done these days, but in the past the solution to this issue would have been to run a diagnostic of speakers that are not working, and send the diagnostic number to Sonos support for troubleshooting. I suggest you do that for this pair.

And do the same as a separate complaint for the Era 100 and the Beam when they are playing. For these note that speakers stuttering due to a network issue is a valid complaint. Speakers sounding bad because you do not like their sound signature cannot be addressed except by a speaker change. Unless you are saying that the Era, for example, sounds fine when playing music from Spotify, but not when it is playing music from the turntable, wirelessly sent to it by the Sonos Amp. In which case, this is cause for a valid complaint to Sonos Support.