SMSL DO200 User Manual

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 only the voltage specified on this unit. Using this unit with a higher voltage than specified is dangerous and may cause fire, damage to this unit, or personal injury. The 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 a salesperson 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 (e.g., 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. Term of Service: Foshan Shuangmusanlin Technology Co., Ltd. promises to offer good-quality products. If the product is broken within 7 days after purchasing when used normally, you can choose to send it back for return, replacement, or repairing (only products that do not affect second sales can be returned). Repairing is free for one year if used normally.
2. Date of Purchase: The date of purchase is in accordance with the date on the invoice or receipt used by the seller. If purchased online, a screenshot of the transaction can be provided.
3. Warranty Void Conditions: If inappropriate usage causes the unit to be damaged, the warranty will be void. This includes:
   • All damages from inappropriate use, including use under non-normal working environments or without following instructions.
   • Dismantling, refitting, or repairing by the user privately.
   • Damage caused by using fittings other than the designated or accredited ones.
   • Inability to provide credible proof of purchase.
4. Repair Process: Send the unit back to the company for repairing.
5. Contact: Contact your S.M.S.L Audio reseller for a return or replacement.

Features

• Both USB and SPDIF support MQA decoding function, and support MQA-CD.
• Features 2x advanced ES9068AS D/A chips, fully optimized to THD+N as low as -122dB, far exceeding official specifications.
• Includes 5x High-End dual op amp OPA1612A and a large number of audio-grade components.
• Utilizes XMOS XU-216, a true 32-bit USB solution, supporting DoP256 and native DSD512, with PCM support up to 768kHz.
• All input ports support DSD (Except Bluetooth); coaxial, optical, and AES support DoP64.
• Qualcomm's latest Bluetooth chip supports LDAC 24bit/96kHz, APTX/HD, SBC, AAC.
• Features an ultra-low phase noise and optimized clock system to achieve ultra-low clock jitter.
• Tempered glass display panel offers higher light transmittance and a longer service life.
• Low-noise power supply improves power efficiency and lowers power consumption.
• Discrete component linear power supplies and multiple low-noise power supplies are specially designed for analog circuits.
• High-quality gold-plated input and output connection terminals.
• Full-view color IPS display with dimmer function.
• Holds Japan Audio Association (JAS) Hi-Res certification.
• Equipped with a remote control and a full-function remote control.

Specifications

Specifications are subject to change without notice.

Remote Control

• Install 2 x AAA batteries as instructed.
• When using the remote control, point it towards the remote control signal receiver on the main unit from a distance of 5 meters (16 feet) or less. Do not place obstructions between the main unit and the remote control.
• The remote control might not work if the remote control signal receiver on the unit is exposed to direct sunlight or bright light. If this occurs, try moving the unit.
• Be aware that using this remote control could cause unintentional operation of other devices controlled by infrared signals.

Operating the remote control

The remote control features the following buttons:

• Power ON/OFF [Power Symbol]
• Up [Up Arrow]
• MENU/OK
• Next level menu [Right Arrow]
• Return
• Down [Down Arrow]
• Input select
• Mute (Define in the menu)
• FN
• Volume + [Volume Up]
• Volume - [Volume Down]

Note: This remote controller uses 2 x R03/AAA batteries.

Display Interface and Instructions

A front view of the SMSL DO200 audio DAC is shown, with numbered indicators pointing to various controls and ports.

Front Panel Indicators:

• 1. Knob: The main control knob.
• 2. Remote window: Receiver for the remote control signal.
• 3. Display: The unit's screen.
• 4. RCA output: Connectors for RCA audio output.
• 5. Bluetooth antenna: Connector for the Bluetooth antenna.
• 6. Optical input: Connector for optical audio input.
• 7. Balanced output: XLR connectors for balanced audio output.
• 8. AES/EBU input: Connector for AES/EBU audio input.
• 9. I2S input: HDMI connector for I2S audio input.
• 10. Coaxial input: Connector for coaxial audio input.
• 11. USB input: Connector for USB audio input.
• 12. AC IN (100-240VAC): Power input connector.
• 13. Power switch: The main power switch.

Package List:

• 1x SMSL DO200 unit
• 1x USB cable
• 1x Warranty card
• 1x Remote control
• 1x AC power cable
• 1x Bluetooth antenna
• 1x User manual

User Interface

The display shows various information:

• 1. Audio format: Displays the current audio format (e.g., MQA).
• 2. Output interface: Indicates active output interfaces. If blank, both interfaces are outputting simultaneously.
• 3. Output phase mark: Shows the output phase. A wavy line indicates Normal phase, and an inverted wavy line indicates Inverted phase.
• 4. Volume Level: Displays the current volume setting.
• 5. Sampling rate: Displays the sampling rate. When using Bluetooth input, it shows the decoding format (SBC, AAC, APTX, APTX HD, LDAC).

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 DO200 includes MQA technology, enabling playback of MQA audio files and streams, delivering the sound of the original master recording.

For more information, visit: https://www.mqa.co.uk/how-it-works

MQA Files Playback

• The DO200 supports MQA decoding via USB, optical, coaxial, and AES interfaces.
• MQA playback does not require additional software. Users can utilize software like foobar2000 or Audirvana with ASIO or WASAPI audio output for MQA playback. It is recommended to set the computer's volume to maximum for the best audio output when playing MQA audio.
• The LED next to the MQA logo on the DO200 glows green or blue to indicate MQA decoding and playback. Green or blue indicates provenance, ensuring the sound is identical to the source material. Blue specifically indicates playback of an MQA Studio file, which has been approved in the studio by the artist/producer or verified by the copyright owner.
• When playing an MQA file, the sampling rate of the original master recording is displayed.

MQA and the Sound Wave Device are registered trademarks of MQA Limited. © 2016

Instructions

INPUTS

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

OUTPUTS

• ALL Normal
• XLR Normal
• RCA Normal
• ALL Inverted
• XLR Inverted
• RCA Inverted

PCM FILTER

• Fast Linear
• Slow minimum
• Minimum Phase

SPDIF Mode

This setting is only valid for optical/coaxial and AES interfaces using the SPDIF protocol.

• NORMAL MODE: Uses only the digital receiver chip (DIR) to process the SPDIF signal. Supports MQA renderer and DoP playback. Due to limitations of the ES9068AS chip, it may not display DoP status or only display 176.4kHz input. This is normal; the unit will still decode DoP and output normal audio.
• PROCESSOR MODE: Utilizes the XMOS processor to process optical/coaxial signals, providing more processing power for complex tasks including MQA and DoP. In this mode, the DSD icon will be displayed correctly when playing DoP audio.

Note: Avoid switching this mode frequently. It is recommended to restart the machine after switching modes to prevent potential output noise.

A frequency response graph is displayed, illustrating the 'Slow minimum', 'Fast Linear', and 'Minimum Phase' filter settings.

Sound Color

There are 9 sound color settings available in the DO200:

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

These settings utilize the ES9068AS DSP to create different sound colors. They do not alter the frequency response curve. When set to "Standard", this feature is bypassed.

PRE MODE

Controls volume management:

• Vol Fixed: Volume is fixed at the maximum output level, and the DO200 ignores volume operations.
• Vol Variable: Volume can be adjusted, allowing the DO200 to function as a pre-amplifier.

FN KEY FOR

The FN key can be configured for the following functions:

• Switch XLR/RCA
• ALL Outputs
• Bluetooth
• Switch Phase

DPLL

Settings range from MIN to MAX (15 kinds available, default is 5 kinds). A higher number increases the range for adapting to jitter, while a lower number improves performance against clock jitter.

This DPLL setting is a special function of ESS series products. It adjusts the internal DPLL digital phase-locked loop circuit bandwidth to balance anti-clock jitter and input tolerance.

Functionality:

• When input signal clock stability is good, this value can be reduced for better system clock performance.
• When input signal clock stability is poor, the sound may be interrupted. Increasing this value can prevent sound interruption, especially when using TV as a signal source.

I2S Mode

This option matches different I2S interface standards. Please check the interface definition of the signal source before use.

• NORMAL: Standard I2S pinout.
• INVERTED: Inverted I2S pinout.

Diagrams showing the pin assignments for NORMAL and INVERTED I2S modes are provided.

DSD Channel

This setting is used to correct channel mapping when using I2S input for DSD audio.

• DSDL=PCM DATA: The DSD left channel uses the PCM DATA pin.
• DSDL=PCM LRCK: The DSD left channel uses the PCM LRCK pin.

Diagrams illustrating the pin assignments for DSDL=PCM DATA and DSDL=PCM LRCK are provided.

Note: When using the I2S input to stream DSD audio, if the left and right channels are incorrect, use this option to correct it.

DSD FLAG

This setting determines the DSD FLAG pin assignment.

• DSD FLAG=PIN15
• DSD FLAG=PIN14

Diagrams showing the pin assignments for DSD FLAG=PIN15 and DSD FLAG=PIN14 are provided.

DIMMER

Adjusts the display's auto-off timer.

• Range: 5 seconds ~ 60 seconds.

After setting, the screen will automatically turn off within this time. The screen will re-light if the remote control or knob is operated at any time.

BRIGHTNESS

Adjusts the display brightness.

• Level 1 ~ Level 6

RESET

Resets the unit's settings.

• During Bluetooth input: Long press the middle button of the knob to reset only the Bluetooth pairing status.
• During other inputs: Long press the middle button of the knob to clear all settings, including Bluetooth.