STREAM Series Megapost

[Stephen Healy]

Hi everyone,

I am opening this ‘mega thread’ as a place to centralise a lot of questions about STREAM1 & 3 (and LPS1) in the build up to their full release and shipping which will come this summer. Treat this as an FAQ or AMA about any questions you have!
As promised previously, i will do my best to do an upfront ‘deep dive’ that will hopefully address a lot of your queries right away.
I imagine many of you are approaching this from the perspective of existing Mk3 and PULSE series owners, so with that in mind I will try to be as comparative as i can for those of your wondering if you should update/upgrade (or not).
I am going to stick largely to the functionality and engineering side of things, or in other words I am not going to comment deeply on ‘how much better’ is X versus Y. This is for several reasons.
Firstly, I have not done A/B (C/D/E...) comparisons of every single variation of STREAM, Mk3, and PULSE products with all different modules fitted and with/out Phoenix devices etc.
Secondly, everyone has different usage, systems, rooms and listening impressions, so it's hard for me know ‘how much’ improvement YOU will specifically get because so often the answer is ‘it depends’ on your exact setup and expectations.
Lastly, quantifying gains of sound is a rather nebulous task, and my description is no substitute for trying the product out for yourself and trusting your own ears.

Nonetheless, there are clear gains and distinctions in some areas that I can certainly testify to help point you in the right direction.

Now, on to the overview!

 

[Stephen Healy]

STREAM Series – the conception

The STREAM series was designed primarily to replace the Mk3 range, contrary to the impression that ZEN and ZENith Next-Gen were in fact the replacements (I’ll admit we did not help ourselves with the naming there). The Next-Gens did, however, lay the groundwork for the new modular design approach that we are now rolling out across the entire Innuos range meaning that storage, specialised output type and CD ripping are now all optional choices.
Whilst many users enjoyed the turnkey solution of the Mk3 being an easy, plug and play all in one server-streamer-ripper, this was at times double-edged sword.
We received requests to both include DACs across more products, and at the same time to remove them entirely for being surplus to requirement. And whilst the fully integrated storage and ripping was convenient to many, it was a deterrent to many others who did not want these elements, or did want them but to be serviceable/accessible themselves.
The solution was a modular approach as introduced by the Next-Gen. Have storage, or don’t. We can fit it, or you can. Want it to be just a server? Then do not get a dedicated audio output module. Or do add one if you want it to be a high-performing player, now with various levels of analogue output quality. Only choose and pay for what you want/need.
Furthermore, it means upgrades and alterations to the system can now be carried out on a much more local level, hugely reducing the ‘return to base’ needs to get a bigger SSD or change a CD mechanism, for example.
Having this configurability applied to the Mk3 price point meant we had a product range that replaced not only Mk3 but also PULSE series since the functional options overlapped. This has the added advantage of greatly simplifying the product range; 6 core products are now condensed down to 2, so whilst STREAM series initially seems like an expansion of the product lineup, this is not so; the number of core products has actually shrunk.

Five Pillars

Before I go into technical details, it is important to understand that the design and engineering principles we have applied across the full range is revolved around five main principles or ‘pillars’ of design:

• Processing

• Power Supply

• Chassis

• Output Stage

• Network

You will notice that these pillars are addressed at different levels as you move up the product range, and this will be the basis of which future Innuos products will be conceived and produced.

 

[Stephen Healy]

New Features

Regardless of which MkII, Mk3 or PULSE series product you currently own and regardless of whether it is a STREAM1 or STREAM3 you will be considering, there are inherent generational benefits you would at once receive.

• A product that can optimally adapt to music server, digital transport, or analogue streamer – or a variation of all the above, with no redundancies or hardware that is surplus to requirement.

• Accessible storage, using an M2 NVMe SSD. Have it pre-fitted by Innuos, or install your own. Or have none.

• Dramatically faster performance with more than 3 times the CPU processing of Mk3/PULSE and using newer DDR5 RAM.

• Support for the Real-Time Kernel to reduce system and audio processing latency.

• Output Modules allowing much more long-term flexibility and scope for upgradability, now including multiple DAC module options to offer dramatically better analogue output at more price point levels.

• IR Receiver to support use with infrared remote controls, offering typical playback control but also instant access to assigned presets that are pre-configured in Sense (v3.3+) Get your favourite playlists, radio stations, or smart mixes playing through the touch of a button.

• USB-C port to allow connection of newer USB drives for high-speed data transfer whether importing, backing up or playing directly from drive. Also usable for specific DACs or even charging smart devices from.

• Faster Ethernet Ports at 2.5gbe (requires 2.5gb enabled router/switch).

• New design language, with touch-sensitive front power button and backlit Innuos logo and chameleon-LED to change colour.

• Independent Operating System SSD with power-loss protection that is separate from library storage with miniscule power consumption, allowing Roon Core functionality even with no added internal M2 SSD installed.

With all the above considered, this alone may be compelling enough to upgrade even if the level of SQ is roughly the same. Whilst we are all here for sound quality first and foremost, the correct feature set is sometimes just as important or too easily overlooked.
But sound quality is our number one priority, so this brings us back to the question of ‘how much better is X versus Y’...

 

[Stephen Healy]

Sound Differences

Let’s begin by clarifying the change in overall generational positioning. Broadly speaking;

STREAM1 replaces ZENmini and PULSEmini

STREAM1 + LPS1 replaces ZEN Mk3 and PULSE

STREAM3 replaces ZENith Mk3 and PULSAR

The LPS1 is a big step forward over the earlier LPSU and covers the gap in performance/price up to STREAM3, whereas previously the ZEN Mk3 was often in an awkward place of comparison against the ZENmini Mk3 + LPSU which was very close in price. For this reason, we do not currently foresee the need for a ‘STREAM2’ to bridge between 1 and 3 and it is hard to see how it would be qualitatively much different from a STREAM1 + LPS1 anyway.

This covers the logic of the lineup. Next, we will take a look at each product more closely, but before this there is an important element to mention.

A note on Output Modules

Both STREAM1 and STREAM3 carry a dedicated output module stage (one of the key Five Pillars!) with its own independent power supply (another Pillar!) which is perhaps the biggest contributor to sound improvements over their predecessors. So in simple terms, if the question is ‘does a STREAM1 sound better than a ZENmini’ then the answer depends greatly on whether an output module is being used or the standard mainboard USB output, similar to what was primarily used on all the earlier products (except for PULSAR that had PhoenixUSB built-in). This can shift the answer from ‘yes its better’ to ‘yes, it's much better’.

To put it simply, this goes back to my earlier disclaimer of how much better is STREAM1 and 3 can only be answered with ‘it depends’. I would argue these new devices are better in almost every single aspect, but the inclusion (or not) of a dedicated output module will dictate just how much better it is in terms of sound.

Whilst on the subject, here’s a reminder of the available modules and their compatibility:



Both devices can come pre-fitted with 2TB and 4TB M2 SSD storage, and the STREAM3 also has an 8TB option.

With this in mind, and remembering all the generational feature benefits already listed earlier, let’s dive into each product more closely.

 

[Stephen Healy]

STREAM1
(versus ZENmini Mk3 & PULSEmini)
As already outlined, the biggest sound quality gain for the STREAM1 is the inclusion of the CX regulator module as previously found in higher models like the PULSAR and elsewhere. This provides a very clean, low-noise power rail to the output module stage only. This means the audio output stage of the STREAM1 is very greatly improved over ZENmini and PULSEmini when using an output module. If using the standard USB output, you would still gain some improvement thanks to lower system latency and the Real-Time Kernel, and that the included SMPS (switch-mode power supply) is of better quality than before as it now includes built-in filtering to help reduce noise.

STREAM1 & LPS1
(versus ZEN Mk3 & PULSE)
The LPS1 is a strong improvement over the existing ZENmini LPSU, now using a 150VA transformer for lower impedance and better quality Mundorf caps over the previous Nichicon caps, plus it adds the potential for chassis grounding. This, combined with CX stage in the STREAM1, is a very decent SQ step up over the ZEN Mk3, and would exceed the PULSE with the presence of an output module.
It has a nice trick up its sleeve; there is a 2nd ‘accessory’ power output that can power a device like a DAC or Switch (such as an Innuos one at a lower price point than the PhoenixNET?!) which places it slightly in the direction of a universal PSU.
The LPS1 is backwards compatible with the ZENmini Mk3 and PULSEmini.

STREAM3
(versus ZENith Mk3 & PULSAR)
The STREAM3 shares a fair amount of DNA with the PULSAR since this proved to be a very well-received and effective platform. Consequently, this means STREAM3 is a very solid upgrade over a ZENith Mk3 in terms of sound, although existing PULSAR owners may find sound quality to be broadly similar. The same PSU with 300VA transformer and ARC6 active rectification module is present, as is the CX regulator and solid 10mm CNC-machined chassis. The STREAM3 has a TLC SSD rather than the pSLC of the PULSAR, but STREAM3 does have Real-Time Kernel support. Essentially, the STREAM3 could be thought of like a PULSAR that now has storage and music server capabilities (along with all the other generational benefits mentioned earlier in this post).

There is one important distinction; the STREAM3 will be the only Innuos product to support the PhoenixDAC, a new high-end, dual-mono balanced DAC board with an accompanying dedicated power supply module that was designed in partnership with Sean Jacobs. This gives STREAM3 the possibility to be a very high-performing standalone streamer without the need of an external DAC. The presence of the extra PSU board and space it requires means it cannot be fitted into PULSAR or any other products at this time.
The STREAM3 is undoubtedly a great progression from the ZENith Mk3. PULSAR owners may consider STREAM3 if they want to gain some of the features or functions (such as the potential of the PhoenixDAC, Roon Core etc) without penalty to the sound quality they currently already enjoy.

 

[Stephen Healy]

FAQ
I hope that helps illuminate some of the ideas behind the new STREAM series, and how they might relate to your current setup. I’m sure there will still be questions of which I will try to pre-empt some of those below, however I won’t go into deeper pricing/availability here - keep in touch with your dealers for that!

Innuos is all about CD ripping, so why is there no internal CD ripper?
We're about a lot more than CD ripping and this has been the case for quite some time now. But whilst the physical ripper is not internal to the products anymore, our existing software and ripping engine remains (which is the more qualitatively crucial part) – it's now a simply a case of the ripping hardware being optional and can be supplied at your own discretion via USB optical drive. I suspect of the number of users who would prefer us to keep the internal ripper, there were even more wanting Innuos to remove it as surplus to requirements (which is something many audiophiles really dislike).

Also, on a practical level optical drives are only getting more scarce, not more abundant. This is not a reliable basis to include in a new product range where we need supply confidence spanning a decade realistically. This is the reality we face, so to those of you still planning to rip your CD collection but not yet begun – I strongly encourage you to start now!

So what are the recommended USB optical drives and M2 SSD drives then?
For optical drives, the vast majority should work. Asus drives seem to be globally available, sensibly priced, and physically discreet.
For M2 SSD drives, we recommend WD Red SN700 for the balance of speed, power consumption and longevity. You can of course source other brands, just try to avoid ones with large heatsinks attached to them as this may block the shield from being fitted back on.

Does this mean Mk3 and PULSE are no longer supported?
Support for products do not cease just because their production does; software updates will carry on for quite a long time yet. Point and case, Mk3 series was technically discontinued several weeks ago, but still received the significant Sense 3.3 update that included Qobuz Connect, Spotify Connect, SmartQ and more. We’re of course already working on Sense 3.4 which will also include some oft-requested features, and this too will come to Mk3 and PULSE series.
Many of these units are still within warranty too, so we will of course carry on technical service for both ranges.

Which output or module is going to sound the best?
It depends! We still maintain our preference for USB, but you need to play to the strength of your specific DAC, so the answer does still hinge a lot on that. Why not consider going for one of the new internal DAC modules instead? This would be an even better consideration for those using SenseUPnP from the Innuos just as a server, transferring data to a separate streamer within the same HiFi rack. Having the Innuos take over as the primary streamer and straight to the amplifier would be a simpler and more direct approach.

Why does the STREAM1 not have options for PhoenixDAC, PhoenixI2S or 8TB?
The STREAM1 is physically not large enough to accommodate the slightly larger PhoenixI2S module and the same is certainly true of the significantly more sizeable PhoenixDAC kit. The comprehensiveness of the PhoenixDAC (and corresponding price) does not make much sense for the STREAM1. Similarly, an 8TB M2 SSD is quite price prohibitive in relation to the STREAM1, so we did not feel it made much sense to propose it as an option (although the STREAM1 is still completely capable of supporting an 8TB SSD).

 

[Stephen Healy]

Well done if you have made it this far!
I do hope you have found this post helpful! If there is anything you think I may have left out or have any other questions, please feel free to post them below!

 

[Malc.]

Hi Stephen, very helpful and informative.

 

[Stephen Healy]

Hi Stephen, very helpful and informative.

Thanks Malc, glad it helped

 

[erho]

yes, now I know what to order, thank you

 

[mooney058]

Super interesting and useful! Apologies for pestering with stupid jokes/questions!
Can’t wait for Stream1+LPS1 to arrive

 

[erho]

Super interesting and useful! Apologies for pestering with stupid jokes/questions!
Can’t wait for Stream1+LPS1 to arrive

which module have you ordered bro?

 

[mooney058]

which module have you ordered bro?

No module yet. Will use regular USB for hooking to the current DAC (tubulus argentus usb cable). In a week’s time will be heading over to a dealer to check some Audio Note stuff (amp and DAC) and will decide then if to get the SPDIF module

 

[frank7036]

Thank you Stephen for a welcome clarification of the new model line-up, what’s on offer and why. Big job to get that down in digital print, congrats.
I noticed the comment about faster Ethernet ports using faster switches - can you comment on what Innuos perceive as the gain to sound reproduction from this adaptation?
As I understand it the PheonixNET switch was deliberately designed to use 100Mb.

 

[erho]

just ordered Stream1 with LPS1

 

[mooney058]

just ordered Stream1 with LPS1

Hope I get mine before you. My order is almost 1 month old

 

[erho]

Hope I get mine before you. My order is almost 1 month old

you will be the winner I guess

 

[DanCollier]

Thank you Stephen for a welcome clarification of the new model line-up, what’s on offer and why. Big job to get that down in digital print, congrats.
I noticed the comment about faster Ethernet ports using faster switches - can you comment on what Innuos perceive as the gain to sound reproduction from this adaptation?
As I understand it the PheonixNET switch was deliberately designed to use 100Mb.

Thats indeed a good question. I'll discuss with Stephen and we'll get back to you Monday since hes off for his Birthday today!

 

[frank7036]

No module yet. Will use regular USB for hooking to the current DAC (tubulus argentus usb cable). In a week’s time will be heading over to a dealer to check some Audio Note stuff (amp and DAC) and will decide then if to get the SPDIF module

Congratulations on your choice. The dealer does the module install when you have decided? Have they said how long it takes, eg is it just bring the unit back and we install while you wait?

 

[mooney058]

Congratulations on your choice. The dealer does the module install when you have decided? Have they said how long it takes, eg is it just bring the unit back and we install while you wait?

Do not know yet. Will decide after listening to the Audio Note gear.