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QA361 HiFi Lossless Pure
Sound Music Player |
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Spur with
longterm accumulation
Just for the uncompromising sound quality |
Where is the ceiling of the portable
player? |
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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. |
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Make efforts to achieve the extremely clean and penetrating
sound base, the delicate and pure emotion restoration, the easy
and elegant sound style |
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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.
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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. |
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EIGHT
SELLING POINTS |
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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. |
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Power supply is the mother of sound |
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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. |
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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
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Clean, penetrating and delicate are the largest characteristics
of QA361 sound, and it is closely related with the investment of
power supply. |
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Super Power Supply
Supported by Double Super Capacitors |
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Respectively supply the power to the analog
circuit and digital circuit |
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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. |
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The clock is the soul of sound |
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by an overall unified high precision femtosecond clock |
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| 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. |
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DAC is adopted by AK4495SEQ sound quality special edition + High
voltage power supply |
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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. |
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AK495SEQ is not the main reason for sound
quality
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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. |
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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 |
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| 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. |
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MCU or DAC chip directly
controls the volume by the digital |
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| Balance of the left and right |
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Digital volume will compress and
reduce the number of bit, small volume loses the signal
conversion accuracy severely. |
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0 cost |
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Common precise potentiometer |
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Balance of the left and right |
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Unbalanced left and right will cause
biased sound, the imaging is not clear, and the
unbalance reaches to +/-3% |
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The cost is increased less than $1 |
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PGA2311UA programmable analog
potentiometer |
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Balance of the left and right |
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The analog potentiometer controlled by
programme achieves the left and right balance of
+/-0.05dB |
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The cost is increased more than $10 |
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Ear amplifier circuit is adopted by
6 OPA1622, make sure the current output and capacitive load
driving capability |
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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. |
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Four kinds of thrust mode of ear amplifier adapt to more
types of big headphones and small headsets |
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The thrust mode includes: Standard
Large current
High voltage
Dual-high ( Larger current + High voltage ) |
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The analog signal is controlled by low distortion
dual power analog signal electronic switch, so as to
achieve the gain control |
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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. |
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Balance is
considered after the single end is ultimate
Single end is compromised without the balance |
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| 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. |
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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.
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The following square wave output
analysis is the measured figure. |
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PCM output square wave analysis
figure |
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PCM To DSD output square wave
analysis figure |
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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. |
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Design of the extremely penetrating
sound
Linear reading the music data
Let the sound background becomes very black |
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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. |
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QA361 Adapts To The Crowd |
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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. |
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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 |
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| 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 |
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| 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 |
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| Notes: 24Bit /
352.8KHz or DSD128 high bit rate documents can be supported
while TF card has a very steady high speed reading response. |
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PARAMETERS SPECIFICATION |
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* 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. |
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* Analog audio parameters:
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Frequency response |
0-20KHz |
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Signal-to-Noise |
112dB |
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Dynamic range |
115dB |
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Degree of separation |
106dB |
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Distortion |
0.0008% |
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* Output level
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LINE
OUT |
2Vrms |
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PO unbalance |
5.26Vrms (no-load
in high voltage mode) |
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PO balance |
10.4Vrms
(no-load in high voltage mode) |
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* Rated output power of single end headphone port
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8 ohm |
720mW@ large current mode, 280mW@ standard mode |
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32 ohm |
400mW@ dual high
mode, 170mW@ standard mode |
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300 ohm |
100mW@ high
voltage mode, 35mW@ standard mode |
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* Balanced output power (BTL): It is theoretically 4 times
than the single end power, practical measurement
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300
ohm |
320mW@ high voltage mode,130mW@ standard mode |
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* 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 |
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Application Scenarios |
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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 ) |
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BAL / Wiring order of balanced headphone plug |
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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. |
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FIGURE DISPLAY AREA |
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You can see some reviews about this product: |
http://audio-ph.ru/reviews/audiopleer-qls-qa-361-utonchennaya-poeziya-muzykalnykh-sfer
http://earphonia.com/2018-awards/2018-best-dap-dac-amplifier-awards/
http://earphonia.com/digital-audio-players-daps/qls-qa361-review/
https://moonstarreviews.net/qls-hifi-qa361-the-portable-digital-audio-player-review/
https://www.head-fi.org/showcase/qls-qa361.23551/reviews
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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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Price: USD $799.00( Stop production&out of Stock ) |
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