anybody replaced their Connect with a Port?

Just further commenting on the quality of the Power Supply for the Port. Why is this not visibly labeled   with the output specs and country of origin (we know where from anyway)? The 13 Amp connector does not appear to have a replaceable fuse either. I discovered tiny printing etched on the connector end but is too small to read. This is the worst power supply that I have encountered on an electrical product to date. The only reason for providing a low voltage power supply is that electrical products can be cheaply made overseas with no H&S risk and can be supplied worldwide with a country specific adapter like this. Reverting back to my Connect for a better subjective sound. Port is being returned shortly does not give me any feeling of equivalent quality.

Updating my earlier comments concerning Sonos support finding a solution to reinstate my Boost and Connect as a separate system under S1. Giving credit where it is due, the problem was solved over a further Sonos chat session this morning. On this occasion another support team member took over the transcript and the problem was sorted fairly quickly using an alternative approach. I felt like giving this a mention because I have been openly critical recently on this forum, concerning my dissatisfaction with the Port. Now that my S1 set-up has been restored I feel in a joyous mood, as I’m able to return the Port finally back to port. To me the S1 App interface appears clearer and has a default fixed output when connecting to digital. The S2 App allows variable output over digital, this can be made fixed as an option, however I found this too easy to revert back to the volume control slider by touching a tiny button next to this inadvertently. I also did not like the background colour changing to suit the album art covers in my music library, often reverting to a dirty brown, enough said about that though. That’s all folks.

I’ve no idea what this means. A tiny button next to the volume slider? There is no tiny button on Now Playing which would switch Fixed Volume to Variable. On the left there’s Mute; on the right the rooms picker for grouping. In the middle, just a dead bar saying “Fixed Volume”.

This is perhaps no longer relevant to you but:

It is. 12V 1A. China.

For a SMPS of that rating a replaceable fuse has to be a rarity. I’ve yet to meet a ‘wall wart’ USB charger with one, and they’re typically rated at up to 12W output for just a single port, with multi-port units commonplace.

See above.

Perhaps that’s a factor, but it also avoids the proximity of mains voltage to sensitive audio parts. There are several respected audio vendors I can immediately think of who use outboard PSUs. It's not as if the demands placed on a device like Port require reserves of transient power.

The $2 Port power supplies can backwards infiltrate the mains supply with electrical noise. A mid price low voltage linear power supply will cost 100% over the Port. I’ve gone to some lengths in getting best possible fidelity from my Connect, proportionate to it’s cost. I have achieved this by using an MCRU mains lead into a six way Iso-Tex mains block, connected with an even a higher grade MCRU cable to a new noise filtered un-switched power socket outlet. All-in cost for this, taking 1/6 of the cost for the shared six-way mains block and MCRU final connection cable and the full the cost of MCRU mains cable to the Connect is around £200, (lower than to upgrade the Port). The end result has been outstanding, the Port simply isn't in the same league. Said enough now to rattle the usual cages.

Boy, am I glad I quit focusing solely on the equipment some years ago, and started listening to the music. 

And of course you have conducted a rigorous, level matched, double blind test to prove your findings (and I bet this rattles you far more than you have rattled us)? 

Further to being cross-examined over the tiny button next to the volume slider on S2, I confess that you are right, the button exists, but is not for the purpose of releasing the volume slider. I have my iPad in front of me now playing Pachelbel Adagio in landscape orientation. The volume slider moves and is presently at maximum position. I’m now going to Settings… System… Select the Room… Volume limit and reset this to maximum allowed volume. Now moving back to Room playing Pachelbel the volume slider is still fully to the right. There is a little symbol that looks like a TV screen which I have referred to as being a button. Pressing this a pop-up displays the track now playing and the room setting. I have now realised that volume limits can be made to suit individual room settings. I have not found a way to immobilise the volume slider as is the default for S1 for using the digital output, which I find annoying having only 2 locations in use.

Settings → System → Room_name → Line-Out → Line-Out Level

If you’ve been adjusting the volume limit all along while leaving the Line-Out as Variable, rather than Fixed, then it potentially explains the ‘night and day’ differences between Port and Connect. As I remarked in an earlier post there is evidence that Port uses more DSP in Variable, to protect the S/PDIF from clipping.

In Fixed Volume mode there should be zero difference, whether the SMPS is inside the enclosure or at a safe distance in an outboard PSU.

Thank you for pointing this out, i’ll check over the settings once more.