Popular Post sligolad Posted February 13, 2019 Popular Post Share Posted February 13, 2019 13 hours ago, Norton said: What’s different about these cards? They don’t seem particularly cheap compared to new SDXC etc, so I must be missing something to do with the SLC designation? 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. odelay, Doak and Monge 1 2 Audio PC - Gigabyte H97M-D3H, i7 at 800Mhz, RAM at 800Mhz & PPA OCXO Mobo, Teradak ATX Linear for 20 pin ATX on Mobo, Paul Hynes SR7EHD 12v, 5v & 5v supply on Mobo, Stammheim 12x LT3045's for 1.3v to RAM direct supply, JCat V2 USB Card, WTFPlay Linux Audiophile Player control by MELE F10, Startech LEX to REX on 12v Paul Hynes with 2x SLC cards and out by POE to ISO/Regen, PPA Red USB Cable, Lampizator Big7, Nige design Lifepo4 powered amp, Raidho C1s. Link to comment
Paul R Posted February 13, 2019 Share Posted February 13, 2019 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. Doak 1 Anyone who considers protocol unimportant has never dealt with a cat DAC. Robert A. Heinlein Link to comment
Doak Posted February 13, 2019 Author Share Posted February 13, 2019 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. Doak's Audio System Link to comment
barrows Posted February 13, 2019 Share Posted February 13, 2019 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. Do you have links which show measurements of less noise from an SLC SD card? SO/ROON/HQPe: DSD 512-Sonore opticalModuleDeluxe-Signature Rendu optical with Well Tempered Clock--DIY DSC-2 DAC with SC Pure Clock--DIY Purifi Amplifier-Focus Audio FS888 speakers-JL E 112 sub-Nordost Tyr USB, DIY EventHorizon AC cables, Iconoclast XLR & speaker cables, Synergistic Purple Fuses, Spacetime system clarifiers. ISOAcoustics Oreas footers. SONORE computer audio | opticalRendu | ultraRendu | microRendu | Signature Rendu SE | Accessories | Software | Link to comment
Qhwoeprktiyns Posted February 14, 2019 Share Posted February 14, 2019 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. Link to comment
Popular Post Qhwoeprktiyns Posted February 14, 2019 Popular Post Share Posted February 14, 2019 Storing music as wav files require less processing than storing them in a compressed format. Whether that makes a difference will probably depend on whether the rest of the player is optimized. If you only take one factor into consideration chances are you will hear no difference. The SD players being tested here are not "best in class" and i am not sure what conclusions can be drawn aside from "everything matters". You can take the best source and use it with poor speakers or a noisy/distorted amp and you will not hear a difference. Same here: simply having an SD card slot means nothing unless the rest of the player is optimized: board layout, power supplies, processing, signal output... Aune is not a "cutting edge" company they just assemble standard parts and sell them for a good price. I would not expect much more from them. Compare that with the ECDesigns or SDTrans build and you will see that careful attention has been paid to every component. ECDesigns has a customized every aspect of the player and accompanying DAC. They developped the software to process wav files with minimal coding using a very low power processor. The board layout is designed to minimize electrical interference. Battery supply is used. The DACs digital input is a custom PLL. The DACs have a custom architecture, etc... The difference is clearly and imlediately audible. As is often the case on this forum, there is a tendancy towards thinking that magic can be made by assembling off the shelf components: change a power supply, reclock a network switch, change a cable, use a different disc, install a low latency software, etc... These are all shots in the dark. Sorry folks, but there is no simple recipe to great sound... barrows, Doak and panasonicst60 3 Link to comment
Doak Posted February 14, 2019 Author Share Posted February 14, 2019 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. Doak's Audio System Link to comment
barrows Posted February 14, 2019 Share Posted February 14, 2019 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". Ralf11 1 SO/ROON/HQPe: DSD 512-Sonore opticalModuleDeluxe-Signature Rendu optical with Well Tempered Clock--DIY DSC-2 DAC with SC Pure Clock--DIY Purifi Amplifier-Focus Audio FS888 speakers-JL E 112 sub-Nordost Tyr USB, DIY EventHorizon AC cables, Iconoclast XLR & speaker cables, Synergistic Purple Fuses, Spacetime system clarifiers. ISOAcoustics Oreas footers. SONORE computer audio | opticalRendu | ultraRendu | microRendu | Signature Rendu SE | Accessories | Software | Link to comment
Superdad Posted February 15, 2019 Share Posted February 15, 2019 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... UpTone Audio LLC Link to comment
Monge Posted February 15, 2019 Share Posted February 15, 2019 @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 Monge 1 Link to comment
Monge Posted February 16, 2019 Share Posted February 16, 2019 The qls361 need to be charged so my question above is irrelevant I think. Look here https://www.head-fi.org/showcase/qls-qa361.23551/reviews Doak 1 Link to comment
Popular Post sligolad Posted February 16, 2019 Popular Post Share Posted February 16, 2019 43 minutes ago, Monge said: The qls361 need to be charged so my question above is irrelevant I think. Look here https://www.head-fi.org/showcase/qls-qa361.23551/reviews Good review for the QA361 and fits with my findings. Pity they did not try an SLC card with the WAV firmware and line out which to me was the hidden treasure of this unit. Needs at least 2 days of continuous play and then it sounds amazing. odelay, tapatrick, Monge and 1 other 1 3 Audio PC - Gigabyte H97M-D3H, i7 at 800Mhz, RAM at 800Mhz & PPA OCXO Mobo, Teradak ATX Linear for 20 pin ATX on Mobo, Paul Hynes SR7EHD 12v, 5v & 5v supply on Mobo, Stammheim 12x LT3045's for 1.3v to RAM direct supply, JCat V2 USB Card, WTFPlay Linux Audiophile Player control by MELE F10, Startech LEX to REX on 12v Paul Hynes with 2x SLC cards and out by POE to ISO/Regen, PPA Red USB Cable, Lampizator Big7, Nige design Lifepo4 powered amp, Raidho C1s. Link to comment
Popular Post Doak Posted February 16, 2019 Author Popular Post Share Posted February 16, 2019 25 minutes ago, Monge said: The qls361 need to be charged so my question above is irrelevant I think. Look here https://www.head-fi.org/showcase/qls-qa361.23551/reviews The linked review provides a lot of great info on the QLS QA361 portable player. "sligolad" has relayed to me details of his personal experience with this seemingly incredible little package. The QLS QA361 can play anything you feed it as far as file types and bit-rates coupled with its superior line out capability and engineering make it a candidate to be a very compact "one box" digital solution - literally a complete digital front end that one can hold in the palm of his hand. I am am VERY excited about the possibilities for this unit. I think it well deserves its own thread. There are other devices I'd planned to explore on this thread. With the New Year holiday is wrapping up in China I will be doing my best to establish contact with a couple of manufacturers representatives in hopes of securing examples of these "non-connected" streamers that are more along the lines of the Aune X5s, though w/o DAC, more features and with much better UI (user interface). motberg, Monge and odelay 3 Doak's Audio System Link to comment
Popular Post Paul R Posted February 16, 2019 Popular Post Share Posted February 16, 2019 You know, not that long ago, there were MQS SD music releases. (No relation to MQA!) I am not sure they ever made it to the states, but they were “hi rez” music released on a micro SD card. They came from Astell & Kern- and were not really hi res (24/44.1 FLAC files) but I remember a friend swearing they had the best sound ever. Just a piece of trivia, but thought it might encourage you an bit! tapatrick, Doak and Monge 2 1 Anyone who considers protocol unimportant has never dealt with a cat DAC. Robert A. Heinlein Link to comment
Popular Post Doak Posted February 16, 2019 Author Popular Post Share Posted February 16, 2019 10 minutes ago, sligolad said: Good review for the QA361 and fits with my findings. Pity they did not try an SLC card with the WAV firmware and line out which to me was the hidden treasure of this unit. Needs at least 2 days of continuous play and then it sounds amazing. Thanks sligolad! That fits with what I am finding "out there" in my research on the QLS361. I am very seriously considering acquiring one. Not only does it fit the parameters I set in my early post on this thread - it appears to far surpass them. Thanks again for the details you have provided. Here's a link to another review of the QLS QA361 that contains lots of good info and pics. This review does appear on Head-Fi but here it is in a substantially better format: https://earphonia.com/digital-audio-players-daps/qls-qa361-review/3/ tapatrick and Monge 1 1 Doak's Audio System Link to comment
Popular Post Doak Posted February 16, 2019 Author Popular Post Share Posted February 16, 2019 Lots of good detailed info on the QLS QA361 at the company website: http://www.qlshifi.com/en/wzcapi/qa361.htm Here's a graphic explanation of PS in the unit: I encourage perusal of this info and opinions offered on its contents by people who know considerably about this stuff than I do. odelay and tapatrick 1 1 Doak's Audio System Link to comment
Popular Post Doak Posted February 19, 2019 Author Popular Post Share Posted February 19, 2019 For a couple of days now I’ve been listening to the Aune X5s as a stand-alone player. Amazing what we do and what we pay for that last X% of sound quality. The little X5s plays as well as streams PCM to 24/192 along with DSD64. It is a basic though effective digital front end that sounds good for $275 delivered with no need for a computer, network, internet, WiFi, etc. A quick calculation shows it to cost less than 5% or 1/20th of my “Big Rig” digital setup. I won’t dwell on this for long, since it is a more than sobering thought. FYI: A Sandisk 128GB SD card loaded up with a mix of hi-res PCM and DSD 64 plays perfectly. Index of files/albums pops up on the screen almost instantaneously when the card is inserted into the front slot.Using the remote or the buttons on front of the unit it’s simple to scroll through the alphabetized list and to find and play what you want. I confidently call it’s sound “good” and I’m a long term, hardcore Audiophile ( capital A intentional). I’ve no doubt that many/most, maybe all “regular folk” would think it sounds more than good. Yep, pretty damned sobering. 😐 No, not trading in my Auralic/Lampizator, etc,etc, etc front end,,, not yet anyway, if ever. More off-line options will be explored with more versatility, higher SQ, higher convenience factor - in various combinations. gstew, motberg, tapatrick and 1 other 2 2 Doak's Audio System Link to comment
Doak Posted February 20, 2019 Author Share Posted February 20, 2019 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 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. 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. 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. 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. 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. Super Power Supply Supported by Double Super Capacitors Respectively supply the power to the analog circuit and digital circuit 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. The clock is the soul of sound QA361 is adopted by an overall unified high precision femtosecond clock 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. DAC is adopted by AK4495SEQ sound quality special edition + High voltage power supply 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. 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. 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. MCU or DAC chip directly controls the volume by the digital 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 Common precise potentiometer 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 PGA2311UA programmable analog potentiometer 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 Ear amplifier circuit is adopted by 6 OPA1622, make sure the current output and capacitive load driving capability 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 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 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 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. 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. 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. 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. 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 720mW@ large current mode, 280mW@ standard mode 32 ohm 400mW@ dual high mode, 170mW@ standard mode 300 ohm 100mW@ high voltage mode, 35mW@ standard mode * Balanced output power (BTL): It is theoretically 4 times than the single end power, practical measurement 300 ohm 320mW@ high voltage mode,130mW@ 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 Application Scenarios 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 ) 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 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 Doak's Audio System Link to comment
tapatrick Posted March 2, 2019 Share Posted March 2, 2019 "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 Topaz 2.5Kva Isolation Transformer > EtherRegen switch powered by Paul Hynes SR4 LPS >MacBook Pro 2013 > EC Designs PowerDac SX > TNT UBYTE-2 Speaker cables > Omega Super Alnico Monitors > 2x Rel T Zero Subwoofers. Link to comment
Doak Posted March 2, 2019 Author Share Posted March 2, 2019 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! 🖖 Doak's Audio System Link to comment
tapatrick Posted March 2, 2019 Share Posted March 2, 2019 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 Topaz 2.5Kva Isolation Transformer > EtherRegen switch powered by Paul Hynes SR4 LPS >MacBook Pro 2013 > EC Designs PowerDac SX > TNT UBYTE-2 Speaker cables > Omega Super Alnico Monitors > 2x Rel T Zero Subwoofers. Link to comment
seeteeyou Posted March 3, 2019 Share Posted March 3, 2019 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 Link to comment
Doak Posted March 3, 2019 Author Share Posted March 3, 2019 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. tapatrick 1 Doak's Audio System Link to comment
Doak Posted March 4, 2019 Author Share Posted March 4, 2019 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. Doak's Audio System Link to comment
Doak Posted March 4, 2019 Author Share Posted March 4, 2019 I have begun a new thread dedicated to using the QLS (Quloos) QA361 and a transport/player: QLS (Quloos) QA361 DAP as Server/Transport This thread will be closed and discussion continued on the new thread. Doak's Audio System Link to comment
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