DO400 - Receiver S.M.S.L - Free user manual and instructions
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| Product Type | Receiver / DAC / Amplifier |
| Brand | S.M.S.L |
| Model | DO400 |
| Dimensions (W x D x H) | Approx. 200 x 200 x 50 mm |
| Weight | Approx. 1.5 kg |
| Power Supply | AC 100-240V, 50/60Hz |
| Inputs | USB, Optical, Coaxial, Bluetooth |
| Outputs | RCA, XLR, 1/4" Headphone |
| Bluetooth Version | 5.0 with aptX HD |
| DAC Chip | ESS ES9038PRO |
| Amplifier Power | 2 x 150W into 4 ohms |
| Frequency Response | 20Hz - 20kHz ±0.5dB |
| Signal-to-Noise Ratio | > 120 dB |
| Total Harmonic Distortion | < 0.001% |
| Main Functions | Volume control, input selection, preamp, headphone amp |
| Maintenance & Cleaning | Wipe with dry cloth; avoid liquids and solvents |
| Safety Precautions | Use only supplied power cable; do not open device; keep away from moisture |
| Spare Parts & Repairability | Contact authorized service center; no user-serviceable parts |
| General Information | 12-month warranty; made in China |
Frequently Asked Questions - DO400 S.M.S.L
How do I connect the DO400 to my computer?
Use a USB cable to connect the DO400's USB input to your computer. Select the USB input using the input selector on the device or remote.
Can I use Bluetooth with the DO400?
Yes, the DO400 supports Bluetooth 5.0 with aptX HD. Pair your device by enabling Bluetooth and selecting 'DO400' from the list.
What is the maximum power output?
The amplifier delivers 2 x 150W into 4 ohms or 2 x 100W into 8 ohms.
How do I switch between inputs?
Press the Input button on the front panel or use the remote control to cycle through USB, Optical, Coaxial, and Bluetooth.
Does the DO400 have a headphone output?
Yes, it has a 1/4-inch headphone jack on the front panel. Plug in headphones and adjust volume as needed.
What should I do if there is no sound?
Check all connections, ensure the correct input is selected, and verify that the volume is not set to minimum. Also check that your source device is playing audio.
Can I use the DO400 as a preamp only?
Yes, you can use the RCA or XLR line outputs to connect to an external power amplifier, bypassing the built-in amplifier.
How do I clean the DO400?
Use a soft, dry cloth to wipe the exterior. Do not use any liquids or chemical cleaners. Keep the vents free from dust.
Is the DO400 compatible with all speakers?
The DO400 is designed for passive speakers with an impedance of 4 to 8 ohms. Ensure your speakers can handle the power output.
What is the warranty period?
The DO400 comes with a 12-month warranty from the date of purchase. Keep your invoice for warranty service.
User questions about DO400 S.M.S.L
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USER MANUAL DO400 S.M.S.L
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Product information
Brand : S.M.S.L
Model : DO400
Category : Receiver