DO300EX - Convertisseur numérique/analogique S.M.S.L - Free user manual and instructions
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| Product Type | Digital-to-Analog Converter (DAC) |
| Brand | S.M.S.L |
| Model | DO300EX |
| Chassis Material | Aluminum alloy |
| Dimensions (W x H x D) | 200 x 50 x 150 mm (7.9 x 2.0 x 5.9 in) |
| Weight | 1.2 kg (2.65 lbs) |
| Power Supply | AC 100-240V, 50/60Hz (external adapter) |
| Inputs | USB-B, Optical (Toslink), Coaxial (RCA) |
| Outputs | Balanced XLR, Unbalanced RCA |
| Supported Sample Rates | Up to 32-bit/768kHz PCM, DSD512 (Native) |
| DAC Chip | ESS ES9038PRO (quad) or similar high-end chip |
| Signal-to-Noise Ratio | ≥ 128 dB (A-weighted) |
| Total Harmonic Distortion + Noise | ≤ 0.0003% (-100 dB) |
| Digital Filter Options | 7 filter modes (e.g., Fast, Slow, NOS) |
| Display | OLED screen showing input, sample rate, volume |
| Remote Control | Infrared remote included |
| Volume Control | Analog volume (32-step relay or digital) |
| USB Input Compatibility | Windows (driver required), macOS, Linux (UAC2) |
| Accessories Included | Power adapter, remote control, USB cable, user manual |
| Maintenance | Clean with a soft dry cloth; avoid liquids and solvents |
| Safety Precautions | Use only the supplied power adapter; do not expose to moisture or extreme temperatures |
| Spare Parts & Repairability | No user-serviceable parts inside; contact service center for repairs |
| Warranty | 1 year (check local regulations) |
Frequently Asked Questions - DO300EX S.M.S.L
How do I connect the DO300EX to my computer?
Use the included USB cable to connect the DAC to your computer. For Windows, you may need to install the driver from the SMSL website. macOS and Linux typically work plug-and-play.
What sample rates does the DO300EX support?
It supports PCM up to 32-bit/768kHz and DSD up to DSD512 natively. Ensure your source is set to output these formats.
Can I use the DO300EX with a gaming console?
Yes, via the optical or coaxial input. Most consoles output optical audio. Use a compatible cable and select the correct input on the DAC.
Why is there no sound coming from my speakers?
Check that the DAC is powered on, the correct input is selected, and the volume is not at minimum. Also verify cables and that the source device is sending audio.
Do I need to break in the DO300EX?
Some users report slight improvements after initial use, but it is not required. The DAC performs optimally right out of the box.
Can I use the DO300EX as a preamp?
Yes, the DAC has a built-in analog volume control. You can connect it directly to a power amplifier or active speakers.
What is the difference between the XLR and RCA outputs?
XLR outputs are balanced and provide better noise rejection over long distances. RCA outputs are single-ended and more common in consumer gear.
How do I update the firmware on the DO300EX?
Firmware updates are rare. Check the SMSL website for updates. If available, download the file and follow the instructions, usually via USB.
Is the DO300EX compatible with MQA?
No, the DO300EX does not support MQA decoding. It only supports PCM and DSD formats.
What should I do if the remote control stops working?
Replace the batteries (CR2032). Ensure there is no obstruction between the remote and the DAC. If still not working, contact support.
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USER MANUAL DO300EX S.M.S.L
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Product information
Brand : S.M.S.L
Model : DO300EX
Category : Convertisseur numérique/analogique