1. Introduction
This manual provides detailed instructions for the proper use, setup, and maintenance of your S.M.S.L M6 Digital to Analog Converter (DAC) and Headphone Amplifier. The S.M.S.L M6 is designed to deliver high-fidelity audio performance, supporting up to 32-bit/384kHz resolution through its various digital inputs, including USB, Optical, and Coaxial. It also features a built-in headphone amplifier for an enhanced listening experience.
Please read this manual thoroughly before operating the device to ensure optimal performance and longevity.
2. Safety Information
- Do not expose this device to rain, moisture, dripping, or splashing.
- Do not place objects filled with liquids, such as vases, on the device.
- Ensure proper ventilation. Do not block any ventilation openings.
- Place the device on a stable, level surface.
- Use only the power adapter supplied by the manufacturer.
- Unplug the device during lightning storms or when unused for long periods.
- Do not attempt to service this product yourself. Refer all servicing to qualified service personnel.
- Avoid placing the device near heat sources such as radiators, heat registers, stoves, or other apparatus (including amplifiers) that produce heat.
3. Package Contents
Verify that all items listed below are included in your package:
- S.M.S.L M6 DAC/Headphone Amplifier Unit
- Power Adapter
- USB Cable
- Remote Control
- User Manual (this document)
Figure 3.1: Contents of the S.M.S.L M6 package. This image displays the main M6 unit, a remote control, a power adapter, and various connection cables, confirming the items included with the product.
4. Product Overview
4.1 Front Panel
Figure 4.1: Front panel of the S.M.S.L M6. The image highlights the central display screen, the multi-function control knob on the left, and the 6.35mm headphone output jack on the right.
- Multi-function Knob: Rotate to adjust volume or navigate menus. Press to confirm selections or change input.
- Display Screen: Shows current input, sample rate, and volume level.
- 6.35mm Headphone Output: Connect your headphones here.
4.2 Rear Panel
Figure 4.2: Rear panel of the S.M.S.L M6. This view displays the RCA Left/Right analog outputs, Coaxial input, Optical input, USB input, and the DC 9V power input.
- RCA L/R Output: Analog audio output for connecting to an amplifier or powered speakers.
- Coaxial IN: Digital audio input (S/PDIF Coaxial).
- Optical IN: Digital audio input (S/PDIF Optical/Toslink).
- USB IN: USB audio input for connecting to a computer.
- DC 9V Power Input: Connect the supplied power adapter here.
5. Setup
5.1 Power Connection
- Connect the supplied DC 9V power adapter to the "DC 9V Power Input" port on the rear panel of the S.M.S.L M6.
- Plug the power adapter into a suitable wall outlet.
5.2 Audio Source Connection
Choose one of the following methods to connect your audio source:
- USB Connection (for computers): Connect one end of the USB cable to the "USB IN" port on the M6 and the other end to a USB port on your computer. For optimal performance and to access higher sample rates (e.g., 32-bit/384kHz), you may need to install specific drivers from the S.M.S.L website.
- Optical Connection (for TVs, game consoles, etc.): Connect an optical cable from your source device's optical output to the "Optical IN" port on the M6.
- Coaxial Connection (for CD players, media players, etc.): Connect a coaxial cable from your source device's coaxial output to the "Coaxial IN" port on the M6.
5.3 Output Connection
Connect your audio output device:
- Headphones: Plug your 6.35mm (1/4 inch) headphones into the "6.35mm Headphone Output" jack on the front panel.
- Speakers/Amplifier: Connect RCA cables from the "RCA L/R Output" ports on the M6 to the analog input of your amplifier or powered speakers.
6. Operating Instructions
6.1 Power On/Off
The device will power on automatically when connected to power. To turn off, disconnect the power adapter. The M6 typically enters a standby mode when no input signal is detected or after a period of inactivity.
6.2 Input Selection
Press the multi-function knob on the front panel to cycle through the available inputs (USB, Optical, Coaxial). The selected input will be displayed on the screen.
Alternatively, use the remote control to directly select the desired input.
6.3 Volume Control
Rotate the multi-function knob on the front panel clockwise to increase volume and counter-clockwise to decrease volume. The current volume level will be shown on the display.
The remote control also provides dedicated volume up/down buttons.
6.4 Menu Navigation and Settings
The M6 features a simple menu system accessible via the multi-function knob or remote control. Press and hold the multi-function knob to enter the menu. Rotate the knob to navigate through options and press to select.
Common settings include:
- Input Source: Select between USB, Optical, Coaxial.
- Output Mode: Switch between headphone output, line out, or pre-out (if applicable).
- Filter Settings: Adjust digital filter characteristics (e.g., Sharp Rolloff, Slow Rolloff). Refer to the S.M.S.L website for detailed explanations of these filter types.
- Display Brightness: Adjust the brightness of the front panel display.
6.5 Remote Control Usage
The included remote control provides convenient access to various functions:
- Power Button: Turns the unit on/off or puts it into standby.
- Input Selection Buttons: Directly select USB, Optical, or Coaxial input.
- Volume Up/Down: Adjust the output volume.
- Mute: Mute or unmute the audio output.
- Menu/Navigation Buttons: Access and navigate the device's settings menu.
Ensure the remote control's battery is inserted correctly and that there is no obstruction between the remote and the M6's IR receiver.
7. Maintenance
- Cleaning: Use a soft, dry cloth to clean the exterior of the device. Do not use liquid cleaners or aerosols.
- Storage: If storing the device for an extended period, disconnect it from power and store it in a cool, dry place.
- Avoid Obstructions: Ensure that the ventilation openings are not blocked to prevent overheating.
8. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| No sound output. |
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| No sound from USB input. |
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| Remote control not working. |
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| Distorted or poor sound quality. |
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9. Specifications
| Feature | Detail |
|---|---|
| Brand | S.M.S.L |
| Model Number | M6 |
| Color | Black |
| Item Weight | 635 g |
| Product Dimensions (LxWxH) | 13.74 x 11.38 x 3.38 cm |
| Number of Channels | 1 |
| Connectivity Technology | USB |
| Speaker Output Jack | Optical, USB (refers to digital inputs, not speaker output) |
| Voltage | 24 Volts (likely internal, power adapter is 9V) |
| Output Wattage | 130 Watts (This value may refer to specific internal components or maximum theoretical values and not direct power output to headphones/speakers.) |
| Batteries Included | No |
| Interface Type | USB |
| UPC | 723120009660, 606462111041, 674387779011, 889957249171, 724519618227 |
Note: Specifications are subject to change without prior notice. Some values, such as "Output Wattage," may refer to specific internal components or maximum theoretical values and not direct power output to headphones/speakers.
10. Warranty and Support
S.M.S.L products are covered by a limited warranty. For specific warranty terms and conditions, please refer to the warranty card included with your product or visit the official S.M.S.L website. Keep your purchase receipt as proof of purchase for warranty claims.
For technical support, troubleshooting assistance beyond this manual, or service inquiries, please contact S.M.S.L customer support through their official website or authorized distributors.
Official S.M.S.L Website: www.smsl-audio.com