1. Introduktion
This manual provides detailed instructions for the setup, operation, and maintenance of your S.M.S.L D200 Hi-Res DAC. Please read this manual thoroughly before using the device to ensure proper functionality and to maximize your audio experience. Keep this manual for future reference.
2. Produktet er slutview
2.1 Frontpanel

Figur 2.1: Forside view of the S.M.S.L D200 DAC, showing the display screen, function knob, and indicator LED.

Figure 2.2: Close-up of the D200's front panel, highlighting the display and control knob.
- Skærm: Shows current input, volume, sampling rate, and other operational information.
- Funktionsknap: Used for volume adjustment, menu navigation, and function selection. Short press to confirm, long press to exit menu or power on/off.
- Indikator LED: Giver statusfeedback.
- Modtagervindue: Til modtagelse af fjernbetjeningssignaler.
2.2 Bagpanel

Figur 2.3: Bagside view of the S.M.S.L D200 DAC, showing all input and output ports.
- XLR udgange: Balanced audio outputs (Left/Right).
- RCA udgange: Unbalanced audio outputs (Left/Right).
- Koaksial indgang: Digital lydindgang.
- Optisk indgang: Digital lydindgang.
- USB-indgang: USB-B port for connecting to a computer or other USB audio source.
- Urinput: 10MHz external clock input.
- Bluetooth-antenne: Tilslutningspunkt til Bluetooth-antennen.
- AC-indgang: Power input (AC 100-240V).
3. Opsætning
3.1 Første tilslutning
- Tilslut strøm: Connect the provided power cable to the AC input on the rear panel and then to a suitable power outlet.
- Tilslut lydudgange:
- For balanced output, connect XLR cables from the D200's XLR outputs to your amplifier eller aktive højttalere.
- For unbalanced output, connect RCA cables from the D200's RCA outputs to your amplifier eller aktive højttalere.
- Tilslut lydindgange:
- USB: Connect a USB-B cable from the D200's USB input to your computer or other USB audio source.
- Optisk/koaksial: Connect optical or coaxial cables from your digital audio sources to the corresponding inputs on the D200.
- Bluetooth: Attach the provided Bluetooth antenna to the designated port on the rear panel.
- External Clock (Optional): If using an external 10MHz clock source, connect it to the CLK IN port. The system will automatically revert to the internal clock if no signal is detected from the external source.

Figure 3.1: Diagram illustrating various input and output connections on the D200 rear panel.
3.2 Driverinstallation (til USB)
For Windows operating systems (Windows 7/8/8.1/10/11), a driver is required for USB audio playback. Please download the latest driver from the official S.M.S.L website. Mac OS X 10.6 and above, Android, and iOS are driverless.
4. Betjening
4.1 Tænd/sluk
Long press the function knob on the front panel to power the device on or off.
4.2 Lydstyrkekontrol
Rotate the function knob to adjust the volume level.
4.3 Indgangsvalg
Short press the function knob to enter the menu, then rotate to navigate to "INPUTS" and short press again to select your desired input source (USB, Bluetooth, Optical, Coaxial).
4.4 Bluetooth-betjening

Figure 4.1: The D200 display showing Bluetooth song information and lyrics.
- Switch the D200 input source to Bluetooth.
- Enable Bluetooth on your mobile phone or other transmitting device.
- Søg efter "SMSL D200" in your device's Bluetooth settings.
- Select "SMSL D200" to pair. Once connected, the D200 display will show "Connected".
- The D200 supports Bluetooth song information, lyrics display, and playback control via remote.
Bluetooth Remote Control Buttons:
- Previous Track: Remote left button
- Next Track: Remote right button
- Pause Playback: Remote up button
4.5 Menuindstillinger

Figur 4.2: Eksample of the D200's settings menu on the display.
Short press the function knob to access the main menu. Rotate the knob to navigate through options and short press to select. Long press to exit the menu.
- INDGANGE: Select the audio input source (USB, Bluetooth, Optical, Coaxial).
- INDKLARING: Select internal or external clock source.
- udgange: Konfigurer outputindstillinger.
- PCM-FILTER: Select PCM digital filter characteristics (Slow Roll-off, Sharp Roll-off, Filter Off).
- DSD-FILTER: Select DSD filter bandwidth (Narrow, Normal, Wide).
- LYDFARVE: Adjust sound characteristics (Low OSR+HPC ON/OFF, High OSR+HPC ON/OFF).
- FORHÅNDSTILSTAND:
- PRE AMP: Preamp output, volume controlled.
- FAST VÆLG: Output volume fixed to the currently set DAC mode volume.
- FAST: Output volume fixed to the maximum volume of DAC mode.
Note: Fixed DAC mode volume is 2dB less than the PRE AMP mode interface output volume.
- FN-TASTE TIL: Customize the function of the FN key (Outputs, Bluetooth, Phase).
- SPROG: Vælg displaysprog.
- LYDFASE: Juster lydfasen.
- DIMMER: Juster skærmens lysstyrke.
- LYSSTYRKE: Juster skærmens lysstyrke.
- NULSTIL: Nulstil alle indstillinger til fabriksindstillinger.
5. Nøglefunktioner
5.1 ROHM BD34352EKV DAC Chip

Figure 5.1: Internal components, showing the ROHM BD34352EKV DAC chip and XMOS XU-316 USB solution.
The D200 incorporates the ROHM BD34352EKV flagship DAC chip, providing high-fidelity audio reproduction with ultra-low distortion (0.00019% / -114dB) and a high signal-to-noise ratio (123dB).
5.2 XMOS XU-316 USB Solution
Equipped with the XMOS XU-316 true 32-bit USB solution, the D200 supports native DSD and DoP modes, PCM up to 768kHz, and DSD decoding up to DSD512 via USB, optical, and coaxial inputs.
5.3 Qualcomm Bluetooth with Lyrics Display
The D200 features Qualcomm's next-generation Bluetooth chip, supporting high-definition codecs such as LDAC (24-bit/96kHz), aptX HD, AAC, and SBC for wireless audio streaming. It uniquely supports simultaneous display of lyrics and song information on the device's screen during Bluetooth playback.
5.4 MQA and MQA-CD Full Decoding
The D200 provides full MQA decoding capabilities via USB, optical, and coaxial inputs, allowing for the complete "unfolding" of MQA audio files to restore original studio master quality. It also supports MQA-CD playback.

Figure 5.2: Explanation of MQA and MQA-CD decoding support.
5.5 External Clock Input and CK-03 Circuitry

Figure 5.3: Rear panel detail showing the 10MHz clock input port.
The D200 includes a standard 10MHz external clock input for connecting professional-grade or atomic clocks, which helps to eliminate jitter. This is complemented by the newly developed CK-03 clock processing circuitry for internal clock optimization.
5.6 Fully Balanced True Preamp
The device features a fully balanced true preamp circuit utilizing dual NJU72315 chips, which contributes to an extremely low distortion level of 0.00013%.

Figure 5.4: Image depicting the dual NJU72315 chips used in the balanced preamp kredsløb.
6. Specifikationer

Figure 6.1: Detailed technical specifications for the S.M.S.L D200 DAC.
| Feature | Detalje |
|---|---|
| Indgange | USB, Optical, Coaxial, Bluetooth |
| Udgange | XLR, RCA |
| Linieudgang Amplitude | XLR: 5 Vrms, RCA: 2.5 Vrms |
| THD+N | 0.00019 % (-114dB) (UN-WTD) |
| Dynamisk rækkevidde | XLR: 123dB, RCA: 121dB |
| SNR | XLR: 123dB, RCA: 121dB |
| USB-overførselstilstand | USB 2.0 Asynkron |
| USB-kompatibilitet | Windows 7/8/8.1/10/11 (Driver Required), Mac OS X 10.6 above, Android, iOS, Linux (Driverless) |
| MQA dekoder | USB / Optisk / Koaksial |
| Sampling Rates & Bit Depth (USB) | PCM: 44.1-768kHz (32bit), DSD: 2.8224-22.5792MHz (1bit), DoP: 2.8224-11.2896MHz (1bit) |
| Sampling Rates & Bit Depth (Optical/Coaxial) | PCM: 44.1-192kHz (24bit), DoP: 2.8224MHz (1bit) |
| Bluetooth | Support SBC, AAC, aptX HD, LDAC |
| Strømforbrug | <10W |
| Standby strømforbrug | <0.5W |
| Dimensioner (BxHxD) | 200x47.9x197.9 mm |
| Vægt | 1.214kg / 2.68lbs |
7. Performance Measurements
The following graphs illustrate the measured performance characteristics of the S.M.S.L D200 DAC, demonstrating its adherence to high audio fidelity standards.

Figure 7.1: THD+N (Total Harmonic Distortion + Noise) measurements for RCA and XLR outputs.

Figure 7.2: Intermodulation Distortion (IMD) and Frequency Response graphs.

Figure 7.3: Signal-to-Noise Ratio (SNR) and Dynamic Range measurements.
8. Fejlfinding
If you encounter issues with your S.M.S.L D200, please refer to the following common problems and solutions:
- Ingen strøm:
- Ensure the power cable is securely connected to both the D200 and the power outlet.
- Kontroller, at stikkontakten fungerer.
- Ingen lydoutput:
- Check that the correct input source is selected on the D200.
- Verify that the output cables (XLR or RCA) are correctly connected to your amplifier/højttalere.
- Sørg for din ampat højttalerne er tændt og indstillet til den korrekte indgang.
- Check the volume level on the D200 and your amplifier/højttalere.
- If using USB, ensure the correct driver is installed (for Windows) and selected as the audio output device on your computer.
- Problemer med Bluetooth-forbindelse:
- Sørg for, at Bluetooth-antennen er korrekt fastgjort.
- Verify the D200 is set to Bluetooth input mode.
- Delete "SMSL D200" from your device's paired Bluetooth list and attempt to re-pair.
- Move your transmitting device closer to the D200 to reduce interference.
- Forvrænget lyd:
- Kontrollér alle kabelforbindelser for løse eller beskadigede.
- Sørg for sampLydhastigheden for din lydkilde matcher D200's muligheder for den valgte indgang.
- Prøv at nulstille D200 til fabriksindstillingerne via menuen.
9. Garanti og support
S.M.S.L products purchased from authorized retailers typically come with a manufacturer's warranty. For specific warranty terms and conditions, please refer to the documentation included with your product or contact your point of purchase.
For technical support, product inquiries, or warranty claims, please contact S.M.S.L customer service or your authorized dealer. S.M.S.L aims to provide excellent products and services.
- Autenticitet: All S.M.S.L products purchased from authorized stores are 100% authentic.
- Online service: 24-hour online service is available for inquiries.
- Garantiperiode: Typically 1 year or more from the date of purchase (may vary by product and region).
You can find more information and support on the official S.M.S.L webhjemmeside eller gennem din forhandler.





