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Transportable headphone rig with a mini PC + MinorityClean etc.


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#1 seeteeyou

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Posted 19 July 2021 - 07:50 AM

Now that PGGB version 2.0.42 would allow specific headphone EQ filters to be imported, a transportable headphone rig with a mini PC running Windows + MinorityClean etc. should be quite interesting
 
https://www.remaster...l#HeadphoneFilt
https://audiophilest...comment-1147970

Option to import PGGB-optimized Headphone EQ filters from remastero website
(for select headphones, list expected to grow)


 
Offline upsampled files are relatively large and therefore the compression ratio of WavPack should be the way to go. Since it's a headless system, MPD wouldn't be a choice at all

https://www.musicpd.org/download.html
https://www.wavpack.com

MPD - Media Player Daemon for Linux and Windows (native WavPack support including DSD)

 
OptimFROG is yet another candidate but MPD wasn't interested in any of that
 
https://github.com/cspiegel/mpd
https://wiki.hydroge...title=OptimFROG
https://www.mail-arc...g/msg00488.html

Your code constitutes a copyright violation, because the OptimFROG code is non-free and thus not compatible with the GPL.

 
MAFA for remote control
 
https://mafa.indi.software

 
Basically there are quite a few form factors available with 8GB of RAM and a reasonably powerful (appropriate for its size @ 10W TDP) Celeron J4125 processor.
 
First one is a palm-sized PC @ 62 × 62 × 42mm (2.44 × 2.44 × 1.65 inches) with active cooling
 
https://www.amazon.c...h/dp/B08KZMPK2P
https://www.cnx-soft...ows-10-mini-pc/
 
Second one is a PC stick @ ‎5.5 × 2.3 × 0.7 inches with passive cooling
 
https://www.amazon.c...E/dp/B08LYRQZ59
https://liliputing.c...eron-j4125.html
 
Last one is a similar to the dimensions of 2.5" SATA HDD enclosures @ 131 × 81 × 18.3 mm (5.2 × 3.0 × 0.7 inches) with passive cooling
 
https://www.amazon.c...t/dp/B08ZXXJL6N
https://www.cnx-soft...ntu-20-04-egpu/
https://dbeley.ovh/e...mini-pc-review/

 

 

So far MeLE Quieter2 seemed to be the most appealing to me because of its M.2 2280 slot for NVMe drives, therefore I could add my own Intel Optane SSD with the best SQ for the money

https://ark.intel.co...m10-series.html

 

 
Since Intel didn't provide support for the USB-C PD (Power Delivery) standard for any NUC models so far, I don't think that any affordable mini PCs would have that any time soon.

Here comes the tricky part

https://www.cnx-soft...ter2-review.jpg

The Mini PC does not contain a Power Delivery Controller, can't support the Type C power adapter with PD protocol. And then maximum voltage limit of MeLE Quieter2 is 26V. Please use the 12V/2A power adapter we supplied.


https://www.amazon.c...t/dp/B08ZXXJL6N

4. Can it be powered by a power bank?
 
No, it’s better not to do that. The mini PC needs a stable 12V/2A power supply, it must connect with the original power supply.

 

Can this be powered with a usb battery pack?
 
We do not recommend this, because a high power may burn out the device. Please use the 12V/2A DC charger delivered by us.

 
I'm assuming that they do know what they're talking about, while they're also quite confident that Quieter2 could get away with 24W (i.e. 12V × 2A) or less.
 
Some audiophile brands such as Synergistic Research happened to add graphene to quite a few product lines, a power bank like this could get the job done
 
https://prestigio.co...graphene-pd-pro
https://www.amazon.c...e/dp/B08G56BHLR

USB Type C: 5V-3A / 9V- 3A / 15V-3A / 20V-2.25A

 
That means I'll simply need to try 27W (i.e. 9V × 3A) as well as 45W (i.e. 15V × 3A) with some PD trigger cables and see how far I could get, maybe I'll also add some TPS7A4701 and LT3045 regulators (15V → 13.5V → 12V) for even better SQ just in case 15V might not work

https://www.ldovr.co...-3a0dscombo.htm

 
Do you guys have other suggestions? Any opinions and critiques are welcomed.



#2 zaurux

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Posted 19 July 2021 - 12:14 PM

Simply a DAP, for a portable solution is more simple.

You can had an external drive with its power supply.


ROON + HQP / Hdplex H3-i5 + 400ATX > USBridge Sig > RME ADI-2 Dac (DSD direct) > SQM > Audia Flight FL100 / Recital Audio Illumine 





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