SMSL DO400 Full Balanced DAC Headphone Amp User Manual

SMSL DO400 Full Balanced DAC Headphone Amp

Product Information

The product is a high-quality audio decoder and amplifier with various connectivity options. It supports MQA-CD, XMOS XU-316 PCM, MQA, and DSD formats. The amplifier has a power output of 166W and 323W. It features 4 PLFC (Professional Line Filter Capacitors) and supports 4-XLR, 4.4mm, and 6.35mm connections. The device also supports various audio codecs such as DSD, AES/EBU, DoP64, USB, LDAC, APTX/HD, SBC, and AAC. It is designed to provide Hi-Res audio quality.

Product Usage Instructions

INPUTS

• USB
• BLUETOOTH
• OPTICAL
• COAXIAL
• AES/EBU
• I2S(HDMI)

PCM FILTER

• FILTER OFF
• MINIMUM PHASE
• APODIZING
• LINEAR FAST
• LINEAR SLOW
• MINIMUM FAST
• MINIMUM SLOW
• LOW DISPERSION

OUTPUTS

• ALL LINE OUT
• HEADPHONE OUT
• BALANCED
• UNBALANCED

DSD FILTER
There are 4 kinds of digital filtering in total. It’s the way that the digital operation means the clutter outside the audioFilter out, respectively

• 47kHz Cutoff
• 50kHz Cutoff
• 60kHz Cutoff
• 70kHz Cutoff

PRE MODE
PRE MODE is the volume adjustment function switchfor the output interface.

• VARIABLE: The output interface volume is controlled.
• FIXED: The output interface volume is fixed.

HPA GAIN

• LOW
• HIGH

SOUND COLOR
This machine has a total of 9 tone modes, which are processed by DSP through DAC, which are:

• Rich1, Rich2, Rich3
• Tube1, Tube2, Tube3
• Crystal1, Crystal2, Crystal3

This setting is usingthe DSP of DAC, to make some different sound color, all of these settings will not change the frequency res ponse curve.When set to “Standard”, this setting will be bypassed.
DPLL

• MIN ~ MAX
  (A total of 15 kinds, the default is 7 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!

FN KEY FOR

• SWITCH LINE/HPA
• BLUETOOTH
• OUTPUTS
• PHASE

I2S MODE

• NORMAL
• REVERSED

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+)

DIMMER

• 5 second ~ 60 second
  (The range is 5 seconds-60 seconds. After setting, the screen will automatically go off within this time, and the screen will re-light up if you operate the remote control or the knob at any time.)

BRIGHTNESS
LEVEL 1 ~ LEVEL 6
RESET

• During Bluetooth input, long press the middle button of the knob, the system will only reset the Bluetooth pairing status;
• During other input, long press the middle button of the knob, the system will clear all settings, including Bluetooth.

Safety Notes

• Install this unit in a well ventilated, cool, dry, clean place-away from direct sunlight, heat sources, vibration, dust, moisture, or cold..

• Use the voltage specified on this unit Only. Using this unit with a higher voltage than specified is dangerous and may cause fire , damage to this unit, or personal injury. Our company will not be held responsible for any damage resulting from the use of this unit with a voltage other than that specified.

• Do not attempt to modify or fix this unit by yourself. Contact alesperson or customer service when any service is needed. The cabinet should never be opened for any reason.
  When not planning to use this unit for long periods of time (i.e. when going on vacation), disconnect the power cable from the AC wall outlet.

• Important note:
  The product specifications and information mentioned in this manual are for reference only. The content of this manual is subject to change without notice.

Warranty Terms

1. The Term of Service
   Foshan Shuangmusanlin Technology Co., Ltd promises to offer good-quality products. If the product is broken in 7 days after purchasing when you use it normally, you can choose to send it back for return, replacement or repairing (only the product does not affect the second sales can be returned ). Repairing for free in one year if you use it normally.

2. Date of purchase is in accordance with the date on invoice or receipt uesd by seller, and if you buy it on line, you can show the screenshot of trade.

3. If an inappropriate usage causes the unit damaged, the warranty will be void. As below.

   • All damages by inappropriate use, including using it under non-normal working environment or without following the instructions.
   • Dismantling, refitting, repairing by user in private.
   • Causing damage by using some fittings instead of the designative or accredited ones.
   • Cannot provide credible proof of purchase.

4. Sending it back to our company for repairing.

5. Contact your S.M.S.L Audio reseller for a return or replacement.

Specifications

• Input………………………………………………………………………………..USB / Optical / Coaxial / Bluetooth / I2S / AES
• Output………………………………………………………………………………………………..RCA/XLR/4.4mm Headphone Jack/ 6.35mm Headphone Jack/4-Pin XLR Headphone Jack
• Line Output Amplitude…………………………………………..XLR 5.2Vrms    RCA 2.5Vrms
• Headphome output power.
  • 6000mW x 2(16Ω)
  • 3000mW x 2(32Ω)
  • 700mW x 2(300Ω)
  • 350mW x 2(600Ω)
• THD+N
  • XLR    0.00005%(-125dB)(UN-WTD)
  •  HPA   0.00007%(-123dB)(UN-WTD)
  •  HPA   0.00009%(-120dB)(UN-WTD)
• Dynamic range
  • XLR    133dB
  • RCA      128dB
  • HPA    126dB
• SNR
  • XLR    133dB
  • RCA      128dB
  • HPA    126dB
• Output Impedance
  • LINE OUT  100Ω
  • HPA    near0Ω
• HPA high gain
  • Balanced  +20dB
  • Unbalanced  +14dB
• USB transmission………………………………………………………………………………………………..USB2.0(Asynchronization)
• USB compatibility…………………………………………………………………..Windows 7 / 8 / 8.1 / 10 / 11(Needs Driver) Mac OSX10.6 or Later、Linux(Driverless)
• MQA decoder………………………………………………………………………………………………USB / Optical / Coaxial / AES
• MQA-CD decoder…………………………………………………………………………………………………Optical / Coaxial / AES
• Sampling rate & Bit Width:
  • USB
  • PCM    44.1 ~ 768kHz(32bit)
  • DSD  2.8224 ~ 22.5792MHz(1bit)
  • Optical / Coaxial        44.1 ~ 192kHz(24bit)
  • DoP  DoP256(USB),DoP64(Opti
• Bluetooth specification……………………………………………………………5.1(support SBC,AAC,aptX,aptX HD,LDAC)
• Power Consumption…………………………………………………………………………………………………………………………<40W
• Standby power…………………………………………………………………………………………………………………………………<0.5W
• Size……………………………………………………………………………………………………………………….245x186x42mm(WxHxD)
• Weight………………………………………………………………………………………………………………………………….1.45kg/3.20lbs

SMSL reserves the right to make improvements which may result in specification or feature changes without notice.

Remote control

• If the remote control is still ineffective when it is close to the machine, replace it with a new battery.
• If the user does not use the remote control for a long time, remove the battery of the remote control.
• Dispose of used batteries in accordance with local regulations on battery disposal.

Operating the remote control

This remote controller use 2 x R03/AAA batteries.

Display Interface and Instructions

1. Display screen
2. Infrared receiving window
3. Indicator light
4. Function knob
5. 4.4mm headphone jack
6. 6.35mm headphone jack
7. Balanced headphone jack
8. RCA output
9. Bluetooth antenna
10. XLR output
11. AES/EBU input
12. I2S input
13. Optical input
14. Coaxial input
15. USB input
16. AC IN

Package list

• 1 x SMSL DO400
• 1 x Remote control
• 1 x Bluetooth antenna
• 1 x User manual
• 1 x USB cable
• 1 x AC power cable
• 1 x Warranty card

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 DO400 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

• DO400 supports MQA decoding with USB, optical fiber and coaxial!
• DO400’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.

MQA 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.

Read User Manual Online (PDF format)

Read User Manual Online (PDF format)  >>

Download This Manual (PDF format)

Download this manual  >>