QLS-HiFi QA860 AD1955 24Bit /192KHz DSD Lossless Digital HiFi Music Player

SKU: FM108
Price: US$ 1089.98
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  • It could be used independently as a DAC
  • The most conductive to sound software architecture
  • Support for mastering grade high bitrate file playback
  • Digital DSD player that supports DSD direct play, direct decoding

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Technical Specifications
Sample median: 16Bit or 24Bit.
Sampling rate: 44.1Khz, 48Khz, 88.2Khz, 96Khz, 176.4Khz, 192Khz, DSD 1bit 64FS.
Audio formats supported: WAV (up to 24Bit / 192KHz), APE, FLAC, AIFF, ALAC, DIFF, DSF, MP3.
Digital Output: Coaxial * 1; fiber * 1.
Digital output format: PCM / Dolby Digital / DTS / DSD (DoP v1.0).
Digital Input: Coaxial * 1; fiber * 1 (up to 24bit 192Khz).
Analog output: RCA unbalanced * 1; XLR balanced * 1.
Amp output: 6.35 output port * 2.
Analog output parameters:
Unbalanced terminal output level: 2.44V RMS
Balance end output level: 4.88V RMS
:0-50k Hz frequency response
SNR: 120dB
Dynamic range: 118dB
Separation: 110dB
Distortion: 0.0007%
Amp maximum output power: 600 Europe: 120mw 300 Europe: 250mW 150 Europe: 550mW 64 Europe: 1.2W 32 Europe: 2W
DAC: AD1955 I / V: OPA2134 * 2 low-pass and preamp: LME49720 * 3 amp: LME49720 + OPA2134 + TPA6120
Power Consumption: <30W
Input Power: AC 100-120V or AC 220V-240V 50 / 60Hz (machine switch) (ordering no description always switch to AC 220V-240V position).
Remote control Material: aluminum panels, plastic case, plastic buttons; remote control Size: 237 * 48 * 22mm; Remote Control Weight (without batteries): 135g
Host size: 215mm (W) x330mm (depth) x100mm (height) (including connectors and feet exposed nails).
Host weight: 5KG
Digital inputs: RCA coaxial + square-port Fibre
Digital output: RCA coaxial + square-port Fibre
Analog Output: a set of RCA unbalanced outputs, a set of XLR balanced outputs
Amp output ports: 2 6.35 headphone port
Power input: standard AC power input socket
SD card: standard SD card

USB input interface like A (cpl, no function)

Package include:
1 x QA860 host.
1 x Remote Control (Air Express can not be made due to the battery, so the remote control 2 AAA batteries are not included).
1 x power cord.
1 x 16GB Class10 SDHC card.
1 x brand card reader.
Gifts: 6.35 to 3.5 headphone adapter plug * 1

QA860 HiFi lossless digital music player (hereinafter referred to as QA860) is a set of digital player, DAC, headphone amplifier in one of the high cost HiFi equipment Internal power handling complex, real-time software architecture strongest, ultra-low Jitter clock and digital processing circuits, the unique strict isolation between circuits inside the machine design to ensure that it has a HI-END-level output characteristics.

• The most conducive to sound software architecture
QA860 firmware continuation in QA660, still uses the QLS-HiFi exclusive patented technology --- microcontroller single-threaded pure tone player, unique procedural framework enables digital output with very low clock jitter (Jitter), and the digital audio output into the HI -END peak.

• Support for mastering grade high bitrate file playback
QA860 can play 24Bit / 192KHz high rate of WAV digital audio stream, we know that the traditional CD-ROM only 16Bit / 44.1Khz, 24Bit / 192KHz digital mastering of data than conventional CD 5-8 times the amount of data (a 24Bit / 192Khz mastering songs almost the entire capacity of a CD), so the digital mastering both in the sound field, density, dynamic and resolving power so far beyond the traditional CD quality.

• Digital DSD player that supports DSD direct play, direct decoding
QA860 can support DIFF and DSF files (DSD64, 1bit, Stereo) direct playback, you can output DSD DoP coaxial signal directly, but also through the internal DAC chip CPLD and direct hardware decoder outputs analog signals.

• Sound Features
"Perfect restore each music" Music on Hold original vividness and musicality, background static, such as the deep sea, sounds fresh and moist, clean, transparent, full of atmosphere, the sound field broad, extending across the excellent overall sound directly, transparent, dynamic, enough Naiting.


With digital coaxial and optical digital outputs, so that it could be used independently as a digital turntable.

With digital coaxial and optical digital inputs, so that it could be used independently as a DAC.

Comes with a large thrust headphone amplifier, amp with high impedance and low impedance output port, can directly promote and push a good majority HiFi headphones.

Special support pre-function to facilitate users to connect high-powered speakers or no volume control for pure power amp, you can open pre-function menu settings, and then by remote control the analog output volume (Note: Due to AD1955 chip design problems in DSD mode can only be fixed level output, the volume control on the front stage DSD mode does not work, so if your device has no volume control after the class please DSD files into WAV file playback).

Amp section with independent analog volume control, can be turned off when using the internal pre-amp function to get better sound quality.

DAC section fully balanced amplifier circuit, with balanced / unbalanced analog outputs.

AC input with voltage selector switch, through the switch can adapt to the supply voltage of countries around the world.

Support DSD64, 1bit DSD file DIFF and DSF direct play, direct decoding
Supports WAV, FLAC and other lossless formats and MP3 mainstream lossy compression format.

Support 24Bit / 192KHz high-bit-rate digital audio format WAV and studio mastering WAV file playback.

Support WAV / FLAC with CUE file playback associated, CUE supports ANSI, UNICODE, UTF-8 encoding.

Support SD / SDHC / SDXC, maximum support 128GB SDXC card (available in future software upgrade to support a larger capacity SD card).

OSD supports Simplified Chinese, Traditional Chinese, English.
One filled with songs 16G card boot time is usually about 2 seconds to complete, 32G thousands of songs filled with super-boot SD card need only 3-4 seconds.

3.2-inch LCD screen to display the playback information and working condition.

Operation settings automatically.
Select a folder with Direct manipulation, with the entire card / folder sequential or random play, with fast-forward, rewind, or return with repeated listening on a song.

With time positioning function, you can jump directly to a specific point in time playback; possess AB intercept playback.


Desiging Features:

1 chip single-threaded application architecture, remote control decoding completed by another chip, high real-time, low Jitter is to provide high quality sound guaranteed

(2) Low-Jitter 0.5PPM double precision TCXO designed by 22.5792Mhz with 24.576Mhz corresponding to different bit rate output, combined with a unique digital signal transmission circuit, Jitter as low as unmeasured.

3 The real 24Bit digital audio processing core, supports up to 192K samples.

4. the power part has been carefully designed. Custom two low-noise low leakage flux toroidal power transformer sealing, the digital part and analog part be separate power supply, using a separate PCB board cattle, and uses a unique vibration isolation and absorption techniques, vibration to eliminate cattle brought digital circuits, and clock affected.
The whole machine 23 set low noise power regulators, linear precision multi-stage regulator, RC filter, LC filter ... some independent power supply for each module in order to reduce the impact of each other.

5.DAC, clock, etc. Power final RF frequency using TI's top ultra-low noise LDO, with a very high frequency transient response speed and a very strong high frequency PSRR capacity, measured Bi Lingte some of the top models more suitable for use in digital audio power.Analog, digital, and the control board have adopted the four-layer circuit board design to ensure complete ground plane and digital high signal integrity, while ensuring that the internal resistance of the power supply circuit is low.

6 unique strict isolation between circuits inside the machine design, so that the interference between circuits are completely isolated, so that sounds like a knot on the accuracy greatly improved, and better analytical ability, sound more pure and true. To a machine as multiple independent split to design, in order to prevent mutual interference generated digital sound.

7 headphone preamp section from the front began to use a separate circuit loop, not shared with analog output amp preamp circuit to avoid an impact on the analog part.

8 machine design theory implement the pursuit of extreme fever, power input socket using Swiss Schurter filter outlet, and comes standard with Swiss Schurter Fuse, giving up the front of the power switch and give up easily affect the quality of the electronic switch Standby feature.
Box using pure aluminum + Precision CNC milling building, specially designed structure, providing superior resonance control, and has good RFI / EMI shielding capability.

9 all the features of the software are built can be done without affecting the sound quality

10 Most raw materials are purchased directly from abroad, new original spot, to ensure genuine and quality.

11 follows the industry standard digital audio output All electrically isolated outputs with high current drive capability to ensure signal quality.


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