LOXJIE D40 PRO Audio DAC and Headphone AMP Instruction Manual

D40 PRO
Instruction manual

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Ver 1.1

Features

• USB, optical, coaxial, AES all support MQA decoding function, and support MQA-CD;
• American ESS new generation flagship DAC chip ES9039MSPRO, built-in MQA hard decoding;
• New third generation XMOS XU-316, PCM support up to 32bit/768kHz, DSD support up to DSD512;
• The headphones AMP are designed with a fully balanced circuit and have a very high power output and very low distortion；
• Ultra-low phase noise and optimized clock processing circuitry are used to achieve ultra-low clock jitter;
• In addition to Bluetooth other input ports support DSD transmission, coaxial, optical and AES/EBU support DoP64;
• Firmware upgrade function, users can upgrade the firmware of system and USB by themselves;
• Built-in low-noise power supply processing, while improving power efficiency, lower power consumption;
• Specially designed discrete components linear voltage regulator and multiple low-noise voltage regulator for analog circuits to provide low-noise power supply;
• Qualcomm’s latest Bluetooth chip supports LDAC 24bit/96kHz ,APTX/HD ,SBC,AAC ;
• High quality gold plated input and output connection terminals;
• Japan Audio Society (JAS) Hi-Res certification;
• Equipped with remote control and full function remote control.

Specification

Interface：|
---|---
Inputs| USB / Optical / Coaxial / Bluetooth / I2S
Outputs| RCA / XLR / balanced headphone x1 4.4mm headphone jack / unbalanced headphone x1
Output Level| XLR 5.2Vrms
RCA 2.5Vrms
Output amplitude| 6000mW x 2 (16Ω)
3000mW x 2 (32Ω)
700mW x 2 (300Ω)
350mW x 2 (600Ω)
Audio feature:|
THD+N| 0.00005% (-125dB) (UN-WTD)
Dynamic range| XLR 133dB
RCA 128dB
HPA 125dB
SNR| XLR 133dB
RCA 128dB
HPA 125dB
Output Amplitude| XLR 5.2Vrms
RCA 2.5Vrms
Output Impedance| XLR 100Ω
RCA Near 0Ω
Headphone AMP High Gain| XLR +20dB
RCA +14dB
Audio specifications:|
USB transmission| Asynchronization
USB compatibility| Windows 7 / 8 / 8.1 / 10 / 11, Mac OSX, Linux
MQA decoder| USB/Optical/ Coaxial/AES
MQA-CD decoder| Windows 7 / 8 / 8.1 / 10 / 11, Mac OSX, Linux
Bit depth|
USB| 1bit ,16~32bit
Optical / Coaxial / AES/EBU| 1bit ,16~24bit
Sampling rate|
USB| PCM 44.1~768kHz
DSD 2.8224~22.5792MHz
Optical / Coaxial / AES/EBU| PCM 44.1~192kHz
DSD DSD64(DoP)
Bluetooth specification| 5.0(support SBC,AAC,aptX,aptX HD,LDAC)
Others：|
Power Consumption| 5W
Standby power| <0.5W
Size| 240x43x195(WxHxD)
Weight| Weight

Support
Firmware and driver download: http://www.loxjie-audio.com/

Remote control

Note:

• If the operation does not work even when the remote control is very close to the unit, please replace it with a new battery.
• If you do not want to use the remote control for a long time, please remove the batteries of the remote control.
• Dispose of used batteries in accordance with local regulations for battery disposal.
• Please use 2 AAA batteries for the remote control.
• Remote control operating distance: 5-8 meters.

How to use Bluetooth:

1. Connection: switch the input source to Bluetooth, turn on the Bluetooth function of the mobile phone, search “Loxjie D40 PRO”, and click Connect after searching. When the mobile phone displays “connected”, the connection is successful.

Parts

Switch button
PRESS to turn on/off;
HOLD to turn off the screen.
FN button
PRESS to switch filter mode.
Input selection button
PRESS to switch input source;
HOLD to switch directly to Bluetooth
Output selection button
PRESS to switch line/headphone;
HOLD to switch line output mode.
Display screen
Function knob
PRESS to enter the menu;
HOLD to exit the menu;
ROTATE to change the value or volume.| 4.4mm headphone jack
6.35mm headphone jack
Balanced headphone jack
RCA Output
Bluetooth antenna
XLR Output
AES/EBU input
I²S input (not HDMI compatible) This interface only uses the HDMI socket and cable, it is not an HDMI interface and is not compatible with
HDMI devices!
Optical input
Coaxial input
USB input
Power input (100~240v AC)
---|---

Function and operation instructions

| USB AUDIO
---|---
| OPTICAL
|  COAXIAL
| AES/EBU
| I2 S
| BLUETOOTH

OUTPUT SETTING

| BALANCED
---|---
| RCA
| HEADPHONE

PCM FILTER

| FILTER OFF
---|---
| MINIMUM PHASE
| APODIZING
| LINEAR FAST
| LINEAR SLOW
| MINIMUM FAST
| MINIMUM SLOW
| LOW DISPERSION

DSD FILTER

| 47kHz Cutoff
---|---
| 50kHz Cutoff
| 60kHz Cutoff
| 70kHz Cutoff

GAIN

| Low
---|---
| HIGH

DPLL

• dP0 ~ 9
  (A total of 10 kinds, the default is 5 kinds. The larger the number is, the stronger the range to adapt to jitter, and the smaller the number, the better the performance against clock jitter.)
  This DPLL setting is a special function of ESS series products. It can adjust the internal DPLL digital phase locked loop circuit Bandwidth, so that the chip achieves a balance between anti clock jitter and input tolerance.
  Its function:

• When the clock stability of the input signal is good, this value can be reduced, so that the clock performance of the system is better;

• When the clock stability of the input signal is not good, the sound may be interrupted.
  Increase this value can avoid the sound interruption! Especially when using TV as signal source!

I² S setting：

| Normal phase, DSD is normal
---|---
| Inverted phase, DSD is normal

Note: This option is used to match different I2S interface standards, please check the interface definition of the signal source before use
AUDIO PHASE：

| NORMAL (2+,3-)
---|---
| INVERTED (2-,3+)

BRIGHTNESS

About MQA

MQA (Master Quality Authenticated) is an award-winning British technology that delivers the sound of the original master recording. The master MQA file is fully authenticated and is small enough to stream or download. The D40 PRO includes MQA technology, which enables you to playback MQA audio files and streams, delivering the sound of the original master recording.
Visit How it works https://www.mqa.co.uk/how-it-works for more information.

How to play MQA

D40 PRO supports MQA decoding with USB, optical fiber, coaxial and AES/EBU!
D40 PRO’s MQA playback does not require the use of special playback software, such as foobar2000, Audirvanaplus only needs to support ASIO or WASAPI audio output, and when playing MQA audio, it is best to adjust the volume of the computer to the
maximum,so that the audio output of the computer is in the best condition.
When playing an MQA file, the sampling rate of the original master recording is displayed.
and the Sound Wave Device are registered trade marks of MQA Limited.© 2016

Notes on playing MQA-CD

• Please make sure that what is being played is a genuine MQA-CD.
• Verify that the optical or coaxial signal output of the CD player is an unprocessed source code.

Indicator light description

1. Power indicator
   Power indicator, red when in standby, green when powered on and the display is off.

2. MQA
   The MQA LED glows green, blue or magenta to indicate that the unit is decoding and playing an MQA stream or file, and denotes provenance to ensure that the sound is identical to that of the source material. It glows blue to indicate it is playing an MQA Studio file, which has either been approved in the studio by the artist/producer or has been verified by the copyright owner. It glows magenta to indicate that the unit is rendering an MQA stream or file. This delivers the final unfold of the MQA file.
   Green : MQA
   Blue : MQA studio
   Magenta : MQA Rendering

3. DSD
   When the input signal format is DSD, this LED lights up white.

4. LDAC
   When the signal format received by Bluetooth is LDAC, this LED lights up white.

5. DSD
   When the input signal format is DSD, this LED lights up white.

6. LDAC
   When the signal format received by Bluetooth is LDAC, this LED lights up white.

7. BAL
   When the output interface is BALANCED, this LED lights up white.

8. HPA
   When the output interface is headphone output, this LED lights up white.

References

• LOXJIE AUDIO Official-LOXJIE音频官网
• MQA Explained | How MQA Audio Technology Works | MQA

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