S.M.S.L DL300 Manual
PDF manual · 24 Pages
English
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Frequently Asked Questions
Yes. The DL300 supports MQA decoding over USB, optical and coaxial inputs, allowing playback of MQA files and streams with master-authenticated quality.
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USB supports PCM up to 32bit/768kHz and DSD to DSD512 (DoP256). Optical and coaxial support PCM up to 24bit/192kHz and DSD via DoP64. Various filters and roll-off settings are available to tailor playback.
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Bluetooth 5.1 is implemented with support for LDAC (24bit/96kHz), aptX/aptX HD, SBC and AAC for high-quality wireless streaming.
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Yes. PRE MODE offers VARIABLE for volume-controlled output and FIXED to disable volume control. There is also FIXED DSD BYPASS for direct DSD output with fixed amplitude (~3.7Vrms).
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If phones cannot find 'SMSL DL300' after clearing pairings, remove the saved device entry from your phone and re-search/pair. Short-pressing the remote Bluetooth button can trigger reconnection.
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Yes. macOS (OSX 10.6 and later) and many Linux systems work without drivers. Windows may require a driver for full USB functionality on some versions.
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Keep proof of purchase, avoid unauthorized repairs or modifications, use approved accessories, and operate the unit per the safety instructions to retain the manufacturer warranty.
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Advantages and Disadvantages
Advantages
- Native MQA decoding via USB, optical and coaxial for master-quality playback.
- High-resolution support: PCM up to 32bit/768kHz and DSD up to DSD512.
- Extremely low distortion (THD+N down to 0.00006% / -124dB) and wide dynamic range.
- Comprehensive inputs (USB/optical/coaxial/I2S/Bluetooth LDAC) and outputs (RCA/XLR/headphone).
- Robust build with tempered glass IPS display, aluminum chassis, and gold-plated connectors.
Disadvantages
- Some USB features require drivers on Windows; adds setup steps for some users.
- Advanced I2S and DSD routing options may be complex for non-technical users.
- Fixed DSD bypass locks output amplitude (~3.7Vrms), limiting volume control in that mode.
- Relatively compact size may limit internal cooling in prolonged high-load scenarios.
- Warranty void if unit is opened or modified; repairs require dealer or factory service.
Product Description
S.M.S.L DL300 — High-Resolution DAC & Headphone Amp
The S.M.S.L DL300 is a versatile high-performance DAC and headphone amplifier designed for audiophiles seeking transparent, low-noise playback and flexible connectivity. Built around flagship DAC hardware and modern digital engines, the DL300 supports native MQA decoding and a wide range of PCM and DSD formats, making it an excellent centerpiece for desktop or compact hi-fi systems.
Featuring the third-generation XMOS XU-316 USB interface and a dual-chip implementation (AK4191 + AK4499EX), the DL300 handles PCM up to 32bit/768kHz and DSD up to DSD512. The design emphasizes ultra-low distortion (THD+N as low as 0.00006% / -124dB) and wide dynamic range, supported by multiple low-noise regulated power supplies, five high-end dual op-amps and audiophile-grade components. A tempered glass-mounted color IPS display provides clear format and sampling information, including DOP and MQA status.
Connectivity covers USB, optical, coaxial, Bluetooth 5.1 (LDAC, aptX HD, APTX, SBC, AAC), and I2S inputs; outputs include RCA, XLR, and both 4.4mm and 6.35mm headphone jacks with near-zero headphone output impedance. Output modes and filters are extensive: selectable PCM and DSD filters, various roll-off and dispersion options, and sound color presets. Preamp modes allow variable or fixed output and a DSD bypass for direct, unprocessed DSD output.
The DL300 is housed in a high-quality aluminum shell with gold-plated connectors and ships with a full-function remote for convenient operation. It is JAS Hi-Res certified and optimized for low power consumption (<20W active, <0.5W standby). USB compatibility spans Windows (driver required for some), macOS and Linux, with asynchronous USB transport for stable operation.
Whether used as a primary DAC for desktop listening, a headphone-centric rig, or as a preamp with balanced outputs, the S.M.S.L DL300 balances modern digital decoding, thoughtful analog output design, and user-focused features—making it a compelling option for listeners who want authentic, high-resolution playback without excessive complexity.
Notes
- Supports MQA decoding via USB, optical and coaxial; no special player required if your software supports ASIO/WASAPI.
- Preamp FIXED DSD BYPASS outputs native DSD without internal processing (approx. 3.7 Vrms).
- Use prescribed voltage and avoid unauthorized repairs to keep warranty valid.
- Display dimmer and auto-off (5–60s) help reduce light pollution in listening rooms.
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