Quloos QLS QA390 Mobile HiFi Digital Audio Music Player&USB&DAC Decoder AK4497

Description: QA390 Movable Desktop Player----A truly all-in-one machine A truly all-in-one machine 1+1+1+1>4Dual 1000000uF super capacitor4*18650 batteries =13200mAhFast Charging of Independent BatteriesMore than 30 ultra low noise power chipsAK4497 x 2 DACAD797 x 2 for LPF 11 pcs op amps8pcs dual high current transistorsPGA2311UA for volumeALL TO DSD modeDouble femtosecond crystal Globally unified clockThe Headphone amplifier can output more than 20V The Headphone amplifier transistors current output capability 2700mAComes with pre-amp functionSix headphone jacksThree thrust modesFour sets of hardware gainSix filter modesDual tuning firmware switching mode Dual USB interfaceHWA HD&AAC BluetoothPower management modeAluminum housing, shielding design A truly movable all-in-one desktop player Real: no front end, no connection line, no need to plug in, no need to toss around, no need to match other, not affected by the electrical environment Movable: Built-in 13200mAh battery-powered system that is immune to external factors Desktop: A set of isolated regenerative power supplies are generated from batteries. The internal current and voltage are designed according to the standards of high-end desktops. All-in-one: Realize the complete integration from the power + player + decoder + amp, all the connections and collocations are done internally and done well, maximize the design and tuning of each part, realize 1+1+1 +1>4 effect, let users really hear the good sound we want everyone to hear FeaturesA truly mobile all-in-one machine designed with a large-capacity battery and a current and voltage in the machine according to the standards of high-end desktops.Double 1000000uF low internal resistance super capacitor blessing for digital and analog part of the isolated power supply, similar to the desktop dual transformer design.The balanced amp can output more than 20V, which is convenient for driving high-impedance headphones.The final stage power tube current output capability is 2700mA, which promotes the low-impedance low-sensitivity headphones.The DAC chip uses AK4497EQ × 2 and supports ALL To DSD.Two femtosecond crystal designs, high-speed precision-controlled CPLD clock processing, and global unified clock and synchronous operation modes.Built-in single-chip single-threaded SD card pure music player.HWA (LHDC) HD Bluetooth input for easy connection to mobile phones.Two-way USB interface, all the way to the phone or tablet (no camera kit required), all the way to the Italian interface to access the computer.Four 3300mAh Panasonic (formerly Sanyo) 18650 batteries provide a total battery capacity of 13200mAh.More than 30 ultra-low noise power chips provide a clean enough power for each circuit device.Headphone port is complete, single-ended: 3.5, 6.35; balanced: 2.5, 3.5, 4.4, XLR.Power supply is the mother of soundThe high-precision clock that digital audio relies on also depends on a sufficiently clean power supply. Power circuit design that is lower than battery noiseFor the power supply of digital circuits, the battery is not clean enough. In order to solve this problem, we use a lot of LT3045 chips with much lower noise than the battery in QA390, completely eliminating interference from power supply.The noise of this chip is only 0.8μVRMS, which is much lower than the noise when the battery is working (the noise is about 2.7uV when the 3.7V lithium battery has a 500mA load). At the same time, the chip has a low frequency of nearly 100dB and a high of 76dB at 1MHz. The power supply ripple rejection capability eliminates interference from power supplies.Always insist on the tuning concept of the power supply as the mother of soundMore than 30 ultra-low noise power chips provide a clean enough power for each circuit deviceUltra Low Noise LDO LT3045 x 6Ultra Low Noise LDO ADM7170 x 2Ultra Low Noise LDO LP5907 x 3Ultra Low Noise LDO ADP151 x 5Ultra Low Noise LDO TPS79101 x 4Ultra Low Noise LDO ADP7118 x 2Ultra Low Noise LDO ADP7182 x 2High Speed Low Noise LDO XC6204 x 3Low Noise LDO LP2985 x 1Low Noise LDO LM27762 x 1DC-DC Converter ADP2108 x 2DC-DC Converter TPS61087 x 3DC-DC Converter LT3757 x 1DC-DC Converter LM2665 x 1 Completely different from the battery circuit of the portableMost of the batteries used in portable players are limited to 2 ~ 3A, which makes the sound scale, dynamic and momentum less natural than desktop players. The battery used in the QA390 can achieve a single discharge current of 10A, and we use multiple parallels to further reduce the internal resistance while the current capability is several times. This current explosive force exceeds many machines that use 220V power supply. In addition, the analog and digital inlets of the power supply circuit each have a 1000000uF super capacitor, which provides further protection for the instantaneous current. The built-in very good power supply system is the basis of its good sound. Can be used as a relative reference standard for ideal sound Unconstrained by the volume, the battery generates a set of desktop-level isolated regenerative power supply, which solves the problem that the traditional AC power supply is affected by the power environment, making the sound more stable and stable, so that all users can hear the sound we want to express.The QA390's battery-powered sound is largely unaffected by any external factors and is ideal as a relative reference for good sound. Four 3300mAH Panasonic (formerly Sanyo) 18650 batteries provide a total battery capacity of 13200mAh The four-way fast charging chip independently charges each battery. The ideal diode + ultra-low internal resistance MOSFET is used for discharge management to ensure sound quality. You can use the existing mobile phone charger (including fast charge) or charging treasure to charge the machine, easy to use Perfect battery overcharge, over discharge, over current, short circuit and over temperature protection circuit to ensure safe use Two super capacitors, supplemented by multiple isolated ultra-low noise power circuitsDual 1000000uF low internal resistance super capacitor support for digital and analog partial isolation power supply, similar to desktop dual transformer design Double femtosecond crystal designHigh-speed accurate timing control of CPLD clock processing and digital audio signal optimization Global unified clock and synchronous working modeSeriously and rigorously treat the most important power supply that affects the clock, reduce interference, ensure accuracy, and ensure that the playback system is synchronized with a very high quality clock. Monolithic clock synchronization design, the global source comes from the dual femtosecond clock, which is equivalent to the clock synchronization function between the audio and the DAC.DAC chip uses AK4497EQ x 2 ALL To DSD mode, Listen more than CDALL To DSD mode can upgrade all formats to 1Bit, 5.6448MHz, DSD128 high resolution, 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 figureBy 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.A truly all-in-one playerCurrent and voltage are designed to high-end desktop level standardsBalanced amp can output more than 20V, push high-impedance headphones handy The final stage power tube current output capability is 2700mA, which promotes the low-impedance low-sensitivity headphones. 11pcs op amps in the analog section + 8 dual-current transistors provide high-density, Delicate, Open, Imposing Sound Programmable analog potentiometer volume control solves left and right imbalance and digital lossLossless analog volume adjustment ensures good sound quality at low volume: the adjustment range is wide, the adjustment process is very thin, and the left and right channels are almost completely balanced, thus achieving a wide range of precise control of the volume.The pursuit of good sound is also reflected in every detail, QA390 uses the PGA2311UA with higher price and lower distortion rate instead of PGA2311U. Linearly read the music dataMake the background of the sound very darkStill using single-threaded single-chip to linearly read music data to ensure the real-time performance of audio data forwarding Dual firmware switching mode, Tuning style is bright and mellowPower management mode: The digital output can be turned off, the output of the LINE OUT module can be turned off, the output of the front stage can be turned off, or the output of the amp can be turned off. The Bluetooth and USB are only powered when they are used.Isolation and shielding design of high frequency interference between modulesIn order to continuously improve the sound quality and performance of the product, the materials or wiring are subject to change without notice.Full CNC aluminum housing, partition shielding designOptimized design of traces inside the system, isolation and shielding design of high-frequency interference between modules, digital and analog isolation design on the chassis, and partition shielding design in the entire CNC aluminum enclosure, which greatly reduce EMI interference.Product PositioningDon't care about volume and weight, the pursuit of sound is uncompromising, and you want to experience the sound quality of a large machine on a mobile machine.Frequent business trips, participation in various parties, events, offices, homes, study, living room, bedside and other enthusiasts with mobile needs.A user who wants to go out with a big headphone.Use on the desktop, want to push the big headphones more easily and get a good voice.High-end desktop users who don't want to invest too much money to toss around the wire, electricity, etc., and want to get good sound quality.Very good sound quality desktop unit, can replace your front-end source, can be directly connected to the active speakers or connected to the amplifier to drive passive speakers.The digital and analog outputs are first-class, can be used as a digital turntable or decoded to meet the high sound quality requirements of multiple scenes.The following scenario: (a) If you have invested a lot of money in your desktop system power supply and wire matching, but the sound is still not satisfactory, I suggest you try the battery-powered QA390, its sound can at least give you a reference. (b) If your desktop system is sometimes nice, sometimes not good, one sound during the day, another sound in the middle of the night, or a good period of time and not good for a while, it proves that the electrical environment has a great influence on the sound of your system, completely immune to electricity. The QA390 for environmental impact must be tried.Application scenario: QA390 is widely used and is not limited to the above applications. More applications can be consulted by technicians. Specifications:Internal playback storage media: use an external SD card or TF card plus card sleeve in FAT32 format, currently supports a maximum capacity of 512GBInternal playback support: 16 - 32Bit, 44.1KHz ~ 352.8KHz, DSD64 ~ DSD128.USB interface - USB B port: use the authorized Italian interface Combo 384, support 32Bit / 384KHz PCM and DSD256USB interface--Micro port: use SA9227 interface, Apple phone and tablet do not need camera kit, support 32Bit / 384KHz PCM and DSD128Bluetooth: Supports Bluetooth 5.0, supports Huawei HD Bluetooth HWA（LHDC) and AAC encodingCoaxial input: 75Ω matched impedance, support 24Bit / 192KHz and DSD64(DoP)Optical Input: Supports 24Bit / 192KHz and DSD64（DoP)Coaxial output: 0.5Vp - p75Ω, support 24Bit / 192KHz and DSD64(DoP)Optical output: support 24Bit / 192KHz and DSD64(DoP)Analog output: Frequency response: 20-20KHz S / N: 122dB Dynamic range: 121dB Stereo Crosstalk：120dB THD+N：0.0005%Output level: RCA (L&R) 2.5V (closed pre-amp) XLR (L&R) 5.0V (closed pre-amp) SE (Unbalanced)maximum 10.5Vrms(High amp voltage, Ultra high gain, 600Ω load) BAL(Balance)Maximum 21Vrms（high amp voltage, ultra high gain, 600Ω load)Headphone matching impedance: 8Ω - 600ΩDAC: AK4497EQ x 2, LPF: AD797 x 2Volume control (including preamp volume control): PGA2311UA Reference clock jitter: 0.088 picoseconds (88 femtoseconds)Charging port: Available Type-C port, DC port available, QC2.0 quick charge.External power supply: DC 5.5*2.1 port, can also be charged (panel switch selection)Life time: 8~10 hours (depending on settings, music format, load condition) (measured engineering machine, balance port directly pushes 600 ohm T1, volume 30, digital output off, analog output amp, sound mode descent High gain, high amp voltage, automatic off screen: 30 seconds, 16Bit / 44.1KHz WAV file full card random play, battery life 10 hours and 10 minutes)Charging time: Type-C common charge: 8 ~ 9 hours, Type-C fast charge / DC port: 4 ~ 5 hours Host & Remote Control Material: All-aluminum CNC integrated millingProduct weight: 3.0kg in full package, net weight 1.8kgMachine size: 20cm x 18cm x 4.45cm, Packing size: 33cm x 27cm x 9cmSingle-ended headphone port rated output power 32Ω 1000mW/ch High amp voltage and high gain 300Ω 360mW/chHigh amp voltage and supper high gain 600Ω 180mW/ch High amp voltage and supper high gainBalance headphone port rated output power 32Ω 1300mW/ch Medium amp voltage and supper high gain 300Ω 1200mW/ch High amp voltage and supper high gain 600Ω 720mW/ch High amp voltage and supper high gainAudio Formats Front panel A-- Power switchB-- DC IN charging selector switchC-- Off-screen indicator (this light is on when the screen is off)D--Charging status indicate lampE-- Infrared remote receive windowF-- XLR 4pin balance output portG-- Volume knob (can control the headphone output and PRE-AMP function volume)H-- Balance headphone output port (suitable to 2.5/3.5/4.4 insert needle)I-- Single end headphone output port (suitable to 3.5/6.35 insert needle) Rear panel A-- XLR balanced output right channelB-- XLR balanced output left channelC-- RCA output right channelD-- RCA output left channelE-- RCA coaxial digital outputF-- RCA coaxial digital inputG-- Optical digital outputH-- Optical digital inputI-- USB input - connect the phone (no camera kit required)J-- USB input - connect to the computerK-- Type-C charging input (support fast charging)L-- Power input (Power supply & Fast charge) Dimensions: Package List: 1. QA390 Player x 12. 64GB TF card (with card holder) or SD card x 13. USB3.0 card reader x 14. USB A port to B port USB cable x 15. TYPE-C charging cable x 16. External power supply (can be used for charging) x 17. Infrared remote control x 1 Note: The USB cable connected to the mobile phone is not standard. If you need a friend, please contact customer service to purchase. Free shipping by DHL/EMS Express ( In Stock ) Tip: We will send good by DHL/EMS Express , about need 5-10 working days for the rest of the world, and we will send Tracking Numbe for you, and we will declare the sending for gift with a low value(For example: USD $100.00), to reduction reciever side to pay tax or try to avoid reciever side to pay tax.

Price: 1399.99 USD

Location: ShenZhen

End Time: 2025-01-26T05:10:23.000Z

Shipping Cost: 0 USD

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Quloos QLS QA390 Mobile HiFi Digital Audio Music Player&USB&DAC Decoder AK4497

Item Specifics

Restocking Fee: No

Return shipping will be paid by: Buyer

All returns accepted: Returns Accepted

Item must be returned within: 30 Days

Refund will be given as: Money back or replacement (buyer's choice)

Model: Quloos QA390

Country/Region of Manufacture: China

Operating System: MCU No system

Custom Bundle: No

Connectivity: USB Port-PC, USB Port-Phone, Digital Audio Optical TOSLINK input, Digital Audio Coaxial RCA input

Type: Digital/Analog

Media Input Connectivity: TF Card

Modified Item: No

Features: Linear Reading of Music Files, 0.088ps double femtosecond crystal, All to DSD Mode, A truly all-in-one machine 1+1+1+1>4, Dual 1000000uF super capacitor, 4*18650 batteries =13200mAh, Fast Charging of Independent Batteries, More than 30 ultra low noise power chips, AK4497 x 2 DAC, The headphone amplifier can output more than 20V, Current output capability 2700mA, 11 selected op amps, Music

Non-Domestic Product: No

Color: Black, Red

MPN: Does Not Apply

Audio/Video Outputs: 3.5 Unbalanced headphone interface, 3.5 balanced headphone interface, 6.35 Headphone Jack, 2.5 balanced headphone jack, 4.4 balanced headphone jack, XLR 4pin headphone jack, Stereo Audio L/R XLR, Digital Audio Coaxial RCA, S/PDIF, Stereo Audio L/R RCA

Storage Capacity: External TF Card

Brand: Quloos