They are available now in the US.
I just got mine shipped from audioadvice.com
Hoping to receive it in the next day or so.
Check firmware version, if you got 2.10 there is an update available (I have a 2.11 beta which fixes some clicks at sample switch and DSD channel swap).
Donāt do that.
Try this.
So much for the mouth of the horse.
Thank you Slim! Just placed my order!
Let us know how everything worked out, please.
Hmmm Iām thinking of getting one of these for my old man, replacing his current iDAC2.
The iDAC2 fed up-sampled DSD256 via the ultraRendu sounds incredibly good.
As soon as this Pro-Ject Pre S2 lands in Australia Iāll need to do a demo and comparison.
Magnus, where did you get the firmware update from?
So I managed to do some critical listening last night with headphones. I must say, as a headphone amp I really like it, it drives my b&o h5ās really nicely. I did have some issues with mqa dropping out part way through songs and was starting to get disappointed, but I switched out the USB cable I normally use for my DAC with a newer one and that seemed to solve it. I felt that the iFi Purifier still helped the sound, so left it on. I was also able to do some comparisons of mqa against 16/44.1 flac and sometimes it was clearly better, other times it was less clear, I suspect it is dependant on the original master. Will be putting into my main system after Christmas. My wife has just put TuneIn on over the fire TV. Ugh, sounds horrible 
What is so special about this device? I donāt get what is getting everyone so excitedā¦
Simply the Best! 
10 times more expensive is may be 0.001 mm closer to the ideal asymptoteā¦
So in real life, this little box is the best.
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Well that does not help much, but thanks anyway for sharing your enthusiasm.
I look forward to reading some reviews.
Clever, clever 
It is cheap and designed by someone respected in this industry.
OK. I read some more feedback on some other threads. It seems to be good, but maybe not quite good enough to replace a good dac in a main rig, and maybe not cheap enough to justify placing in a secondary rig (for example, I use a Chromecast in my office)? Just my point of view, of course, but Iāll pass. Always tempting to think one will find a āgiant killerā but I doubt this will be itā¦
Iām wondering what the hype is all about. Is it because it delivers MQA for relatively little outlay? Or that itās an outstanding DAC? Iāve yet to find anything that competes with an IQaudIO DAC+/ RPI combination in this price point. The Bluesound Node 2 (Ā£500 vis-Ć -vis Ā£300 for the Pro-Ject Pre Box S2 Digital) had a very similar sound to the IQaudIO, possibly because they share the PCM5122, but was no better based on my non-scientific listening skills. Is the Pre Box S2 worth an audition?
Donāt you think that youāre so fussy about this little giant?
Not really. Maybe you are being a little over enthusiastic?
The DAC section of the Project is a dual mono design the others you mention is not.
Not sure how this answers my question. The PCM5122 is a stereo DAC CMOS IC; IIRC the Bluesound uses one per channel yet still has a similar sound āsignatureā as another DAC using the same IC costing just a few dollars. Iām interested to learn why people are excited by the Pro-ject ā¦ is it the promise of MQA or does it sound fantastic?
The ProJect also does DSD, which gives more options for upsampling in Roon.