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Doak

"Audiophile" SD Card Transport?

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I am enjoying your adventure here a lot! Thanks for posting it. :)

 

My question - what happens if you store your files on the card as LPCM? 

 

I know on the old Logitech Touch sending the music as LPCM resulted in better sound. 

 

 

 

 


Anyone who considers protocol unimportant has never dealt with a cat DAC.

Robert A. Heinlein

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Turns out the Transcend 128GB card I have does NOT work properly with the Aune X5s (it does work just fine in my VW GTI). I does play for a while then stops and  an error code reading "Incompatible file structure" pops up on the screen. If tried doing a full reformat (now a quicky) and loaded different files with the same result.

The Sandisk Ultra 64GB (of the type pictured below) functions perfectly, so I've ordered a 128GB sample of the same type to give it a try. 

I've read a number of accounts about SD card players/readers often being rather "particular" regarding what cards they work well with and that appears to be true.

I am hoping the SanDisk work out since it costs less than half of the Transcend type that doesn't.

 

trsc128.jpg

sandisk128.jpg

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12 hours ago, sligolad said:

If you google SLC v MLC you will find a lot of good information on why SLC costs more than normal MLC SD cards.

My read is that a lot more processing and electrical activity takes place getting data off an MLC card and I think many of us have discovered that less is more when it comes to reading digital files in preparation for and during playback.

 

In the journey to best sound I have found that the following are super important:

fast clean power (super-caps at end stage)

good clocks with re-clocking just before DAC (not ultra cost clocks but good and potato chip at end of I2s)

Minimum bit processing of digital audio files (stripped back control software, wav only single tread real time operation)

Storage medium with least data processing activity to deliver digital files (SD SLC card)

 

I am no electrical engineer and my conclusions are defined by a long journey of listening tests so YMMV.

I also spent a lot of money and time on USB out and while it has significantly improved with lots of add ons in recent years, after hearing SD playback done at less than one tenth the cost it became my go to for lights out  being there listening.

 

Screen Shot 02-13-19 at 09.54 AM.JPG

Do you have links which show measurements of less noise from an SLC SD card?


ROON: DSD 256-Sonore opticalModule-Signature Rendu optical--Buffalo PRO or DSC-2--Ncore 400 Stereo-Focus Audio FS888-JL E-112 sub-Nordost Tyr USB, DIY AC cables, Iconoclast XLR, Iconoclast speaker, cables, Synergistic Orange & Hi Fi Tuning Supreme Cu Fuses, Dark Matter system clarifiers.    Design/Build Consultant with Sonore

 

                                                       

SONORE computer audio

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He did not claim there was less noise, just less power consumption.

 

The main advantage of SLC is durability and operating conditions (temperature). 

 

There have been studies done on power consumption and it really depends on how the data is read: less frequent reads of larger chunks do require less power but for frequent reads of small chunks standard drives may actually require less power. 

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Agree that magic can happen when we address every single aspect of a design AND that "Everything Matters." I think I laid out what this thread is about in my first post and hoped to clarify it in a couple of subsequent ones. It's an exploration of what may be possible with some existing "off the shelf" components heretofore not mentioned on this forum.

 

At this point I can say this: The little, inexpensive Aune X5s has something to offer. I am continuing to compare it to my 10X more expensive streaming setup and it stands right up to it offering a sound that's quite appealing and in some particular ways even better - Yep, I said the "B" word. It makes REALLY nice music, and I'm not at the end of it yet. 

 

Additionally, the Aune X5s is the first of what I expect to be 2 or 3 additional devices that given their technology may well be better than the Aune and certainly more versatile and convenient. One never knows until it's in the system though. My audio motto of "Simple sounds better - as long as it works" may come into play here, and the Aune sure has "simple" going for it.

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3 hours ago, hopkins said:

He did not claim there was less noise, just less power consumption.

That is why I asked the question: he actually speculated (or inferred if you prefer) that because there was less power consumption given a fixed level of I/O, that there is less noise.  Given the resources of high speed computing manufacturers it would be easy fro them to measure such noise.

On this site there is a lot of conflicting information regarding playback from files stored on SD cards, we have people claiming that SD cards are actually the noisiest storage medium for playback, all the way to people claiming they are the quietest storage medium for playback.  Clearly there is no consensus when it comes to subjective evaluation, perhaps some measurements might add some clarity within all the "noise".


ROON: DSD 256-Sonore opticalModule-Signature Rendu optical--Buffalo PRO or DSC-2--Ncore 400 Stereo-Focus Audio FS888-JL E-112 sub-Nordost Tyr USB, DIY AC cables, Iconoclast XLR, Iconoclast speaker, cables, Synergistic Orange & Hi Fi Tuning Supreme Cu Fuses, Dark Matter system clarifiers.    Design/Build Consultant with Sonore

 

                                                       

SONORE computer audio

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8 hours ago, barrows said:

On this site there is a lot of conflicting information regarding playback from files stored on SD cards, we have people claiming that SD cards are actually the noisiest storage medium for playback, all the way to people claiming they are the quietest storage medium for playback.  Clearly there is no consensus when it comes to subjective evaluation, perhaps some measurements might add some clarity within all the "noise".

 

Well what is clear is that nobody is discussing (nor are players revealing) what SD card transfer modes are being used.  I know that no players are using the cards in the SPI bus mode (no file system support in that but one could store and retrieve files with not much processing), but I hope that some are using the one-bit SD bus mode. Or maybe there could be some advantage to the "Two differential lines SD UHS-II mode."

Read here: https://en.wikipedia.org/wiki/Secure_Digital#Transfer_modes

 

And what of the voltage being used?  3.3V or 1.8V?  

God and the devil are always in the details...:D

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@Doak I have no idea about which SD cards to use, sorry. I was just curiuos..

 

@sligolad Great info regarding the QLS361😀

Do you own the QLS361 and In case which powersuply do you use for the QLS361?

 

Thanks In advance. 

Monge

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Here's detailed product info on the next off-line hi-res SD card player/streamer I'll have in-house - on its way from China via DHL Express. 

The QLS (Quloos) QA361 can be described as a high tech "race car" version premium portable player/streamer. Most everything about it a geared to achieving best SQ, though as always the proof is in the listening.

Thanks again to sligolad for bringing this promising item to my attention:

 

QA361 HiFi Lossless Pure Sound Music Player

QA361_01.jpg

  Spur with longterm accumulation
  Just for the uncompromising sound quality

Where is the ceiling of the portable player?

In high-end desktop player, and high-end desktop player with better sound in the future.
The portable player we make is to be infinitely close to the desktop player.

QA360 has a title of a concentrated small desktop player and QA361 is more close to the desktop player.

QA361_03.jpg
 

Make efforts to achieve the extremely clean and penetrating sound base, the delicate and pure emotion restoration, the easy and elegant sound style

Make efforts to let the sound to be more comprehensive, more perfect, more pleasant, more touching base on QA360LE sound base, try to let the penetrating purification, the feeling of music and fluency to be ultimate, achieve the unique sound quality in the current selling audio players.

 

QA361_04.jpg
Finally, QA361 sound style is derived from QA360LE, the same easy and elegant, as well as nice, compare with QA360LE, it is more penetrating, more condensed and delicate, better treble and bass extension, more excellent feeling of music, more graceful and natural, soft and with the feeling of quality.

QA361_05.jpg

EIGHT SELLING POINTS

1. It is adopted by the single-chip computer single thread ultra real-time code, make sure the sound to be more purified, more details can be restored.
2. It rewrites the code full linear reading card, and isolates TF card power supply, the sound background is more black, more purified and natural.
3. 0.088ps double femtosecond crystal vibration provides the clock for the overall synchronization of the whole machine.
4. Two 470000uF super capacitors independently supply the power to the analog and digital.
5. 6 OPA1622 achieve four kinds of trust mode of ear amplifier: Standard, Large current, High voltage and Dual-high.
6. AK4495SEQ sound quality special edition + high voltage power supply, make sure high quality and the good feeling of music.
7. Enhanced capacitive load driving capability can drive the capacitive load larger than 2000pF.
8. The sound is extremely penetrating, delicate and has the very excellent feeling of music.

Power supply is the mother of sound

Very purified, Very steady, Very low internal resistance power supply design

Power supply is water while music is life, the pure water creates the wonderful life, the pure power supply reappears the moving sound.
QLS-HiFi always insists on the tuning concept of power supply is the mother of sound, because power supply is the head of bottleneck to affect the sound.

 

QA361_08.png

 

All power supply is independent, Not influence mutually
With the characteristics of ultra high speed and ultra low noise, 
As well as ultra output internal resistance

Clean, penetrating and delicate are the largest characteristics of QA361 sound, and it is closely related with the investment of power supply.

QA361_10.png

QA361_11.png

Super Power Supply 
Supported by Double Super Capacitors

Respectively supply the power to the analog circuit and digital circuit

QA361_12.jpg

A good clock can be described by a word "Steady"

A good clock basically has a full, firm and condensed bass, it can be described by a word "Steady". 
Steady shows it should be clean enough, treble response should be guaranteed by the enough good power supply.

QA361_13.jpg

The clock is the soul of sound

QA361 is adopted by an overall unified high precision femtosecond clock
QA361_14.png
Refer to dCS monolithic clock synchronous supply design, the whole situation is derived from the femtosecond clock, it is equal to the clock synchronous function is used in the audio and DAC.

 

QA361_15.jpg

DAC is adopted by AK4495SEQ sound quality special edition + High voltage power supply
QA361_16.jpg

The maximum characteristic of this chip shows: the decoding analog reference voltage can exceed 5V, the maximum can be 7V power supply, it improves the signal-to-noise ratio and the dynamics of sound, namely the sound is more penetrating and clean, and at the same time has the better dynamics and sound freshness in details.

Compare with AK4495, AK4495SEQ has the better feeling of music, its sound is more full and elegant.

QA361_17.jpg

AK495SEQ is not the main reason for sound quality

  In QA361, The cost of DA chip is only occupied 3% than the total cost of material, the cost of power supply is 8 times than the cost of DA chip, the cost of the material of analog circuit reaches to 6 times than the cost of DA chip, a good sound is required to put more investment on around the whole and play a chip to be ultimate.

QA361_19.jpg

 

It is adopted by the volume control architecture of desktop Perfectly resolve the unbalance between the left and the right, as well as the digital loss

After a repeated comparison, still insist on PGA2311 that can deal with the bottom noise problem by consuming the power, occupying the area, increasing the cost, spending more time on the research.

Lossless analog volume regulation, make sure the small volume can also has a good sound quality: very wide regulating range, very detailed regulating process, the left and right is nearly completely balanced, therefore achieve the precise control for the wide range of volume.

PGA2311U pursuing the ultimate also shows on every slight place, QA361 is adopted by PGA2311UA that with the higher price, lower distortion ratio, rather than PGA2311U.

QA361_20.png
 
             

MCU.png

MCU or DAC chip directly controls the volume by the digital

 

MCU-1.png

Balance of the left and right

 

 

Digital volume will compress and reduce the number of bit, small volume loses the signal conversion accuracy severely.

 

0 cost


ALPS.png

Common precise potentiometer

 

ALPS-1.png

Balance of the left and right

 

Unbalanced left and right will cause biased sound, the imaging is not clear, and the unbalance reaches to +/-3%

 

The cost is increased less than $1


PGA2311.png

PGA2311UA programmable analog potentiometer

 

PGA2311-1.png

Balance of the left and right

 

The analog potentiometer controlled by programme achieves the left and right balance of +/-0.05dB

 

The cost is increased more than $10

             
 

QA361_22.jpg

 
 

Ear amplifier circuit is adopted by 6 OPA1622, make sure the current output and capacitive load driving capability

QA361_23.jpg

Many carry-on players including some ear amplifiers don't consider the load driving capability, but it has a great impact on the driving headphone especially the headset. QA361 driving capacitive load capability is enhanced several times, it is very easy to drive some headsets with the larger capacitance.

 
 

Four kinds of thrust mode of ear amplifier adapt to more types of big headphones and small headsets

QA361_24.jpg The thrust mode includes:

Standard

Large current

High voltage

Dual-high ( Larger current + High voltage )

 
The analog signal is controlled by low distortion dual power analog signal electronic switch, so as to achieve the gain control

QA361_25.png

The gain is not controlled by DAC volume without increasing the cost, the gain is not switched at the analog part by the common electronic switch or MOS tube, but it is adopted by low distortion dual power analog signal electronic switch TS12A12511DCNR,through the optimization of switching circuits, the distortion is not increased completely in low gain by our measured data, therefore, make sure the good sound quality is achieved in low gain or high gain. 

Balance is considered after the single end is ultimate 
Single end is compromised without the balance
QA361_26.jpg
Refer to MBL method, the preceding stage is adopted by single end amplification and single end signal processing, just increase the double amplification circuit to the ear amplifier part and use the balanced BTL output, so the balanced output power is 4 times than the single end, due to the balanced output completely separates 2 sound track negative of headphone, The degree of separation of sound is greatly improved, And the unnatural situation caused from the sound appears the phase shift or distortion is decreased as possible as it can, and at the same time it saves PCB area than the whole balanced circuit, In the same PCB area, same volume of player, make the sound to be ultimate ( including the single end output ) by more space, more cost.
 
ALL To DSD MODE, LISTEN MORE THAN CD
Innovative in the portable player provides ALL TO DSD mode: can upgrade all formats to DSD 1bit 5.6MHz high resolution output, even if the original signal is PCM.

The following square wave output analysis is the measured figure.

QA361_27.jpg

 

QA361_27-1.jpg

PCM output square wave analysis figure

 

PCM To DSD output square wave analysis figure

By the comparison of the above measured wave forms, we can find that ALL To DSD is more purified and has less harmonic distortion than the original PCM direct output signal.
 

QA361_28.jpg

Design of the extremely penetrating sound
Linear reading the music data 
Let the sound background becomes very black
Refer to the German cavalry player method, the program of single-chip computer is adopted by full linear reading TF card method, And it can adjust the frequency of ripple wave by changing the size of linear reading document block, and at the same time adopt the voltage rising + three-level RC isolation + large capacitance matrix + LDO mode on the power supply circuit of TF card, so as to reach to the purpose that the ripple wave is perfectly isolated and reduced, and at the same time the audio Jitter is greatly reduced.
QA361 Adapts To The Crowd

1. You have the high-end player, and want to experience the pure tone mode and the extremely penetrating sound again, QA361 is worth having at the same time.
2. If you have the near ultimate pursuit for the sound, and you prefer to compromise the other aspect, QA361 is developed for you.
3. If you pursue the penetrating and delicate, and the good feeling of music, as well as the smooth and natural sound, QA361 is very suitable to you. 
4. If you play the binding for the sound quality, do not miss QA361, it will alleviate the binding for you.
5. If your payer in hand can not drive your headphone / headset, or can not drive well, you can try it.
6. If you love to listen the classical background music while reading, QA361 can bring you the natural and smooth sound to you. 
7. If you like the sound balanced advanced desktop system, and want to experience the similar as the easy and elegant sound from the carry-on device.
8. If you have a busy work and big pressure, and want to listen the good music quietly, seek for a music can touch your soul.
9. If you are a worker in charge of music, and need a player for listening the extremely penetrating, extremely pure restoration music.
10. If you have a lot of headphones / headsets, and need a player can drive most of earphones.
11. If you are an audio researcher, QA361 excellent and pure sound can help your work.
In a word, The friends who have a certain pursuit for the sound quality, and can accept the pure sound player, QA361 is the best choice for you.

QA361_30.jpg

 
 
 

SUPPORT FORMAT

Audio Bit depth, Sample Rate, Bit rate Container, Encoding, Compression
WAV

16 / 24 /32 / 64Bit, 44.1-192KHz, 24Bit / 352.8KHz

Fixed-point, Floating-point
AIFF

16 / 24 / 32Bit, 44.1-192KHz, 24Bit / 352.8KHz

 
FLAC

16 / 24Bit, 44.1-192KHz 24Bit / 352.8KHz

Level 0-8
APE

C1000: 16 / 24Bit, 44.1-192KHz 
C2000: 16 / 24Bit, 44.1-192KHz 
C3000: 16 / 24Bit, 44.1-192KHz 
C4000: 16 / 24Bit, 44.1-96KHz

Fast / Normal / High / Extra High
ALAC 16 / 24Bit, 44.1 / 48KHz M4A container
TTA 16 / 24Bit, 44.1 / 48KHz  
WV 16 / 24Bit, 44.1 / 48KHz Fast / Normal / High / High Plus
DIFF 1Bit, 2.8224 / 5.6448MHz

DSD64 / DSD128 encoding
DST64 unsupported

DSF 1Bit, 2.8224 / 5.6448MHz

DSD64 / DSD128 encoding
DST64 unsupported

SACD-ISO 1Bit, 2.8224MHz

DSD64 encoding (DST64 unsupported)

MP3

16Bit, 22.05 / 32 / 44.1 / 48KHz, 96kbps-320kbps

CBR / VBR / ABR
AAC 16Bit, 44.1KHz M4A Container, AAC LC / SBR
DTS 16Bit, 44.1KHz

WAV Container, DTS-5.1 / DTS-ES encoding

CUE ANSI / Unicode / Unicode Big Endian / UTF-8 encoding
 
Notes: 24Bit / 352.8KHz or DSD128 high bit rate documents can be supported while TF card has a very steady high speed reading response.

QA361_32.jpg

 
 
  PARAMETERS SPECIFICATION  
  * Storage media: Adopt an external TF card, Support FAT32 and exFAT document system, Support the maximum capacity of 256G at present.
* Sound mode: Slow Roll-off, Sharp Roll-off, Short Delay Slow Roll-off, Short Delay Sharp Roll-off, Supper Slow Roll-off, All To DSD.
* High and low gain: Low gain, High gain, It is adopted by analog signal hardware control, make sure the good sound quality is achieved in low gain and high gain.
* Headphone amplifier thrust mode: Standard mode, Large current, High voltage, Dual-high (Large current + High voltage).
* Support the sound track: Two track (Stereo).
* Digital output: 3.5mm coaxial output port * 1.
* Coaxial output: Level 0.5Vp-p, matched impedance 75 ohm, support the highest 24Bit / 192KHz and DoP for DSD64.
* Reference clock jitter: 0.088 micromicrosecond (88 femtosecond).
* Ear amplifier output: 3.5mm single port * 1, 3.5mm balanced port * 1.
* Analog output: 3.5mm Line Out port * 1.
 
  * Analog audio parameters:
 
  Frequency response 0-20KHz  
 
  Signal-to-Noise 112dB  
 
  Dynamic range 115dB  
 
  Degree of separation 106dB  
 
  Distortion 0.0008%  
 
     
  * Output level
 
  LINE OUT 2Vrms  
 
  PO unbalance 5.26Vrms (no-load in high voltage mode)  
 
  PO balance

10.4Vrms (no-load in high voltage mode)

 
 
     
  * Rated output power of single end headphone port
 
  8 ohm

[email protected] large current mode, [email protected] standard mode

 
 
  32 ohm [email protected] dual high mode, [email protected] standard mode  
 
  300 ohm

[email protected] high voltage mode, [email protected] standard mode

 
 
     
  * Balanced output power (BTL): It is theoretically 4 times than the single end power, practical measurement
 
  300 ohm

[email protected] high voltage mode,[email protected] standard mode

 
 
     
  * Output impedance: LINE OUT 93 ohm; PO unbalance 0.18 ohm; PO equilibrium 0.38 ohm. 
* Headphone matching the impedance: 8 - 600 ohm.
* Decoding chip: AK4495SEQ (sound quality special edition), LPF:OPA2107 
* Built-in battery: Ultra low internal resistance customized Li-polymer battery 3.8V---3800mAH 
* Input voltage: 4.8V-5.4V, current 2A and above (TYPE-C interface) (can be charged by mobile phone charger or power bank) 
* Service time: 10H by a conservative estimation (standard mode is single end output, measured player WAV 16Bit / 44.1K, screen is set as 10 seconds for closing, multiple sample devices all exceed 11h), Balanced output reduces the service time around 10%, high current or high voltage mode reduces the service time around 20%, dual high mode reduces the service time around 40%.
* Charging time: 5-6H 
* Dimension of mainframe:115mm * 64.5mm * 16mm
 
MAINFRAME SIZE

Unit: mm

QA361_34.jpg

Application Scenarios

QA361_35.jpg

PO

Drive single end or balanced headphone, three-level or four-level contact pin is supported
BAL Drive 3.5mm balanced headphone. (Wiring order is shown in the figure as below)
LO Circuit outputs high quality analog signal to the power amplifier, ear amplifier, active speaker, vehicle-mounted AUX port and so on
COAX High quality coaxial signal output decoder pure digital power amplifier, AV power amplifier and so on, ( Wiring order is shown in the figure as below )
 

QA361_36.jpg

 

QA361_36-1.jpg

BAL / Wiring order of balanced headphone plug

 

COAX / Wiring order of coaxial plug

The wire material is non-standard, please prepare by yourself. when purchasing the wire material, please confirm if the connection order is consistent with the figure from the seller.
FIGURE DISPLAY AREA

QA361_37.jpg

QA361_38.jpg

QA361_39.jpg

QA361_40.jpg

PRODUCT LIST
1. QA361 HiFi Player * 1
2. 32GB TF card * 1
3. Card reader * 1
4. TYPE-C charging line * 1
5. 2.5 balanced female to 3.5 balanced male connection short line * 1
6. Screen protective film * 1
7. PU leather case * 1
8. User manual * 1

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"Here's detailed product info on the next off-line hi-res SD card player/streamer I'll have in-house - on its way from China via DHL Express. "

 

@Doak have you received your QLS QA361 yet?. Curious if you have any update/listening impressions..?

cheers


ATL DC Blocker > Topaz 2.5Kva Isolation Transformer > Sine SA5 Cryo 5 power strip > EtherRegen switch powered with Ciunas Supercaps 7.5v LPS > Antipodes DXe roon core> PS Audio Directstream Junior Dac 'Windom'> Decware SE84UFO3 Mono Amps > Omega Super Alnico Monitors. PH SR4 power supplies. In addition my reference SQ is a modified SD card Player powered by Ian Canada LifePo4/Ultracaps mod outputting 2x 3.3v > I2S module > PS Audio DAC.

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21 minutes ago, tapatrick said:

"Here's detailed product info on the next off-line hi-res SD card player/streamer I'll have in-house - on its way from China via DHL Express. "

 

@Doak have you received your QLS QA361 yet?. Curious if you have any update/listening impressions..?

cheers

Greetings and thanks for your interest. 

Very happy to say that the QLS QA361 is in-house and has been in my Big Rig for 4-5 days now. The little gem itself is a simple machine as far as how it operates but seems I double my knowledge daily as far as how best to utilize and integrate it into my system. 

I promise to put it all into a separate thread as it well deserves. 

What I know and can share so far: It truly is a “game changer.”  

Hold tight! 🖖

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3 hours ago, Doak said:

Greetings and thanks for your interest. 

 

What I know and can share so far: It truly is a “game changer.”  

Hold tight! 🖖

Fascinating news, many thanks :)

 


ATL DC Blocker > Topaz 2.5Kva Isolation Transformer > Sine SA5 Cryo 5 power strip > EtherRegen switch powered with Ciunas Supercaps 7.5v LPS > Antipodes DXe roon core> PS Audio Directstream Junior Dac 'Windom'> Decware SE84UFO3 Mono Amps > Omega Super Alnico Monitors. PH SR4 power supplies. In addition my reference SQ is a modified SD card Player powered by Ian Canada LifePo4/Ultracaps mod outputting 2x 3.3v > I2S module > PS Audio DAC.

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I also read quite a few positive reviews before, those words sounded as exciting as my thoughts when I'm listening to my trusty Altmann Tera Player

 

https://www.head-fi.org/threads/qls-qa361-impression-thread.866536/page-10

 

Coaxial is the only digital output via its 3.5-mm jack, therefore we'll have to use something like this

 

http://www.ghentaudio.com/part/e06.html

https://www.ebay.co.uk/itm/1m-Gotham-3-5mm-to-RCA-coaxial-SPDIF-soundcard-interconnect-/370336164374

 

It's also interesting to see mod for QA361 already

 

https://www.facebook.com/commerce/products/2269648326387717

 

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11 hours ago, seeteeyou said:

I also read quite a few positive reviews before, those words sounded as exciting as my thoughts when I'm listening to my trusty Altmann Tera Player

 

https://www.head-fi.org/threads/qls-qa361-impression-thread.866536/page-10

 

Coaxial is the only digital output via its 3.5-mm jack, therefore we'll have to use something like this

 

http://www.ghentaudio.com/part/e06.html

https://www.ebay.co.uk/itm/1m-Gotham-3-5mm-to-RCA-coaxial-SPDIF-soundcard-interconnect-/370336164374

 

It's also interesting to see mod for QA361 already

 

https://www.facebook.com/commerce/products/2269648326387717

 

Hello, good to hear from others who are interested in the QA361.

This will be my last post here and I will be closing this thread and opening a new one dedicated to the QLS QA361 in particular.

Yes, I have seen and have posted on the Head-Fi impressions thread. Thanks for including the link. I will be sure to cite it in the new thread.

FYI: the Ghent digital SP/DIG coax cable pictured will not work with the QA361. 

I will give specifics in dedicated thread.

As for the Mod - I am very interested in this!  However, I am no longer on FB and have no intention of returning. Would appreciate any further info you can supply... PM please as this thread will close shortly.

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20 hours ago, seeteeyou said:

I also read quite a few positive reviews before, those words sounded as exciting as my thoughts when I'm listening to my trusty Altmann Tera Player

 

https://www.head-fi.org/threads/qls-qa361-impression-thread.866536/page-10

 

Coaxial is the only digital output via its 3.5-mm jack, therefore we'll have to use something like this

 

http://www.ghentaudio.com/part/e06.html

https://www.ebay.co.uk/itm/1m-Gotham-3-5mm-to-RCA-coaxial-SPDIF-soundcard-interconnect-/370336164374

 

It's also interesting to see mod for QA361 already

 

https://www.facebook.com/commerce/products/2269648326387717

 

Oh, and another Thank You for mentioning the Altman Tera Player! Just getting into some info on it. Much appreciated.

My focus is and will remain on using the QA361 not primarily as a portable player but on integrating it into a full sized, full fledged , room sized music system. 

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