Hi Boblo
It seems like our paths and opinions almost converge on hardware and diverge on use. At the moment streaming is a foreign land for me and my "prime directive" is to render files held on external USB hard drives, rather than stream from a NAS drive, and avoid a laptop handing the music files. The thought of running a NAS drive 24/7 (or whatever) is not appealing. Also I like to "roll" external DACs, which explains my preference for dual-mono configurations. Having seen the shots of the interior of the current Auralic devices it seems like a lot of expensive empty space inside the box, particularly when compared to the Aries Mini. It is difficult to know the difference between the Auralic devices, except the price, and there are more reasonable products from the same part of the globe, such as those from Lumin. Each of the Auralic boxes only do part of what the Aries Mini did at a fraction of the cost - see if you can find on on Amazon or eBay ?
With this in mind, the
Lindemann Bridge should be a natural fit, but it still requires a controller app running on a tablet. It also points to using the
Primo as a transport, rather than using the internal DAC. There are a number of favourable reviews, complete with an EISA product award. More than one review has noted that the
Pro-Ject Stream Box S2 Ultra runs somewhat on the warm side. The
exaSound Sigma Streamer looks interesting at € 685.12, from
https://gear.nativedsd.com/ based in the Netherlands. The site has other similar devices on offer, such as the
Sonore microRendu v1.5 (€ 469), and a number of other devices which are worth looking at. As exaSound is a direct sales company this is the only other supplier and has the advantage it trades in the EU. Compared to the Primo the S2 Ultra is "expensive", which is also true of the Lindemann Bridge; it is based on a generic motherboard while the other two are "bespoke". One of the attractive features of the Primo is that the Volumio OS is embedded and it functions as a local "hot spot" or as part of a network, so it can be accessed from any device capable of runnig a browser. From memory, which may be in error, the address is
www.volumio.local. There is no need of additional controller apps as the Volumio interface is then available in the browser window. No additional bespoke apps or apps that can only run on iPads or iPhones!
There are also additional upgrades that can be added the to
SoTM 200 series, which starts at a reasonable price, then you find with the addition of a number of other separate upgrades, a "tower" quickly forms adding significantly to size and cost. This is the reason for putting the SoTM devices to one side.
Like you I feel the S2 Ultra is overpriced, particularly given the insignificant cost of its basic building block, the RPi. On that basis along, in your shoes I would ask whether it really is a bargain. However, the benefit to me of "something in a box" is that if it fails there is a retailer or address to return it to. On the other hand if a RPi configuration does not work at the first time of asking, you are on your own. If I had grown up using Linux and understanding how to code, perhaps I might be looking towards a DIY set up - so I am willing to pay the cost penalty of getting someone to do it for me and put it in a convenient box. If you have the confidence to put the components together and make it work, it is an alternative pathway.
The Chord Qutest employs FPGA chips with great success and much approved by reviewers. The
Volumio Motivo uses FPGA technology to buffer the incoming digital stream before handing it to the (internal) DAC or the digital outputs for external devices, The digital waveforms should be clean and virtually jitter free.
The cost of the Innuous devices is a disincentive, along with the perception that the software does not give the same control as Exact Audio Copy or similar packages. Again it is a solution "in a box".
Many thanks for sharing your experience of the
SMSL SU-9. It
was one of the devices on my wish list. However the signs for Gustard are not completely fortuitous as the manufacturer has no web presence and the only way to access drivers and other software is through retailers web sites. After reading Amir's review the data from testing the
Gustard X-16 is on my wish list and is impressive on paper but will similar problems to the SMSL SU-9 be found in practice when you open the box? Products from Topping have robust build quality but there are postings where Topping DACs and headphone amplifiers have inexplicably "stopped, never to go again".
Coming full circle back to the question of a digital transport with streaming capability and also able to handle external hard drives. It really is an inside out type of approach where you start with all options and slowly discard the ones that fail to match your requirements. Somewhere else where we diverge is the sampling frequency as I am not sure I would notice the difference in sound quality between 192kHz and 384kHz, although there is an improvement between 44.1 kHz and 88.2kHz; in the same way you either notice an improvement in sound quality with MQA or you do not. Then there is the Roon question.
At this moment for a reasonable outlay I feel the Primo is better value for money than the S2 Ultra, as both are based on the same software package, and the Motivo is expensive for what it does, although it has a tablet-like graphical interface. What is needed is a digital transport designed from the same principles as any other audio-quality device, but not a DCS device that "costs the same as a car".