Chord Mojo 2 + Poly (fw 3.2.4) in DSD64/128/256 playback over home 2.4Ghz Wifi from Roon server, good experience?

Audio Gear Talk Chord
1

Hello,

Currently my Mojo 2 is used as a desktop DAC/headphone amp, always powered/connected to Roon Remote PC over USB.

I’m thinking of adding Poly for streaming.

Will i be (completely) disappointed in streaming over 2.4Ghz home wifi from Roon server for playback of DSD source, 64/128/256 contents using Poly? If only way to get stable playback of DSD contents is to put them on microSD card then looks like Poly isn’t for my need.

I “wished” Poly had support for Ethernet connection (even as a usb-Ethernet adapter) like that of 2Go. :frowning:

Thank you.

2

My WiFi here is generally good, only very little influence from neighboring cells. The module in the Poly struggles with PCM 384kHz in stationary use already and mobile use (walking around in the house) was not possible at this rate. So it seems to me that users are stuck to a practical max rate of PCM 192kHz at best, which IIRC is good for DSD64 (DoP). But as the Mojo is a PCM DAC by design and all DSD sent to it gets converted to PCM before the DAC can do something with it, why bother sending DSD at all, let Roon do the job of converting and use the highest PCM rate you can manage in your environment. At least using Roon, you can’t get DSD256 (DoP) – PCM 384kHz and DSD128 are the maximum you can choose.

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3

I have the a Poly / Mojo (1) combi, and it is my primary headphone setup. In a fixed position it performs very well, without any network issues. Indeed, I can even walk 10 or so metres into the garden without any interuptions.

However, I only play content up to 24-bit 192 kHz PCM or DSD64 using DoP.

Moving around the house sometimes causes a ‘blip’ when switching from one AP to another.

But, I wouldn’t buy a Poly if it was for static use. Instead, I’d go for a purpose built network streamer at a third of the cost. Poly is expensive because of its miniaturization.

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5

Thank you. I’ll pick one (Poly) up and play with it.

Currently my setup for Mojo 2 network/signal path setup is,

Roon server (Windows 10) → 1GbE → Roon Bridge (Windows 10) → USB → Mojo 2

I would like to add to above path the following,

Roon server -->1GbE → 2.4Ghz AP → Poly → Mojo 2

6

If you have Gbit Ethernet, buy a wired network streamer, e.g., FiiO SR11. Poly is designed for portability.

However, if you’re already set on buying a Poly, then this discussion is moot.

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8

Well, the Mojo does, but I get your point, and don’t disagree. It’s my go to headphone setup and it allows me to use Roon while moving around the house, prepping meals, etc. or travelling offline.

My point is that for a fixed endpoint, Poly is not the best option.

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10

It’s original purpose was to make the Mojo truly portable using either DNLA or MPD. Later, Roon Ready was added, along with other configuration options (the original Go figure app wasn’t that good.)

The Poly retails at just under £400 these days, although it was closer to £600 when I bought mine. You are paying a premium for miniaturization–it’s essentially a custom built SBC for the Mojo.

Now, if you want to pair the Mojo with an on-the-go streamer and MPD server, reading music off the SD-card, I’d say, “go for it.” But, if you want a Roon Ready endpoint for a statically placed Mojo, then it’s not the best option: it’s relatively expensive, and Wi-Fi-only (2.4 GHz), so placement is important–sticking it in the Hi-Fi cabinet is not the best placement.

Now, if the OP simply wants affirmation that a purchase decision already made is going to be fine, I can’t do that, even though I thoroughly enjoy using my Poly / Mojo. £400 is halfway to a used Qutest or a FiiO SR11plus SMSL DL300 with change! That would free up the Mojo for portable use.

Just offering options.

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12

I use my Mojo 2 with an RPi4 for stationary headphone use. For mobile use, I use an AudioQuest Dragonfly Cobalt. The Mojo 2 is too large to haul around, IMHO, much more with a Poly attached.

13

Thanks.

How would this SR11 be used in my current Mojo 2 network/signal path, which i’m pasting below again,

Currently my setup for Mojo 2 network/signal path setup is,

Roon server PC #1 (Windows 10) in my server room in basement where NAS units are at → 1GbE → Roon Bridge PC #2 (Windows 10 with ASIO drivers) at my desk side → USB → Mojo 2

note: Using the “ASIO” drivers on Roon Bridge PC

How would i use SR11 instead of Poly in current setup?

My plan with Poly was to do something like below,

Roon server -->1GbE → 2.4Ghz AP → Poly → Mojo 2

Does SR11 has ASIO driver built-in?

Seems like the suggestion with SR11 is to replace my current Roon Bridge PC #2 above (as a current Roon endpoint) with SR11 ? Is that the suggestion with SR11 ?

14

The FiiO would look like this, which is what you would do with the Poly.

Roon server --> 1GbE --> 2.4Ghz/5GHz AP --> SR11 --> Mojo 2

… or …

Roon server --> 1GbE --> SR11 --> Mojo 2

The SR11 supports PCM 32-bit 768 kHz, and up to DSD256.

15

I see your point, thank you.

So, my intent with Poly was to get rid of my current Roon Bridge as a Roon Endpoint, i.e. this is what i had environed for a desk side use,

Roon server → 1GbE → 2.4Ghz AP → [Poly → Mojo 2]

Instead going with SR11 seems like there is no difference between these two,

Roon server → 1GbE → Roon Bridge → Mojo 2 <<----------- this is what i do today,
Roon server → 1GbE → SR11 → Mojo 2

16

More or less. The SR11 (as an example) offers Ethernet, 2.4G and 5G plus more connection options.

I don’t remember if Poly supports native DSD or DoP (or Mojo for that matter) as I only have a couple of DSD releases and prefer PCM (especially with Chord.)

18

Thank you all.

My understanding is that Mojo 2 supports native “native” DSD over ASIO driver on Windows machine. Otherwise, Mojo 2 supports “native” DSD over PCM (DoP).

IIRC, Poly’s way of supporting “native” DSD is the same as Mojo 2.