The SMSL Lin.Lin M20 is a compact yet robust USB DAC/headphone amplifier that punches well above its weight. This review delves into the details of this surprisingly premium device, examining its build quality, functionality, and, most importantly, its sound performance. From its sleek aluminum chassis and glass top plate to its responsive buttons and stable rubberized feet, the M20's physical construction immediately impresses. The rear panel houses multiple connectivity options, including both single-ended and balanced headphone outputs, while the front panel provides clear LED feedback on various operating parameters.Despite its small size, the M20 delivers a surprisingly detailed and smooth audio experience. This review explores the nuances of its sound signature, comparing it to other devices in its price range and highlighting its strengths and weaknesses. We'll also discuss the user experience, including the intuitive operation, firmware update options, and the overall value proposition. Ultimately, this review aims to determine whether the SMSL Lin.Lin M20 earns its place as a top contender in the sub-$200 desktop DAC/headphone amp market.
Pros And Cons
- Good build quality for its $130 price point.
- Compact and aesthetically pleasing design (except for the bottom LEDs).
- Well-designed buttons with quiet clicks.
- Detailed sound with a great soundstage and layering.
- Smooth and pleasant sound signature.
- Independent volume memory for headphone and line outputs.
- Firmware update available to disable bottom LEDs.
- Good value for its price.
- Only 35 volume steps (lacks granularity).
- Headphone outputs located on the rear.
- Bottom LEDs initially considered aesthetically offensive (though fixable via firmware).
Read more: Fiio K11 R2R DAC/Amp Review: A Worthy Upgrade or Redundant Luxury?
Unboxing and Build Quality
The Lin.Lin M20 arrived in sleek packaging, hinting at the premium build quality inside. Upon unboxing, the first impression was one of solid construction. The compact aluminum chassis feels robust and well-made, far exceeding expectations for a device in its price range.
The glass top plate adds a touch of elegance, while the milled aluminum sides contribute to a sense of durability. The buttons are responsive, offering satisfying tactile feedback with a quiet click. The inclusion of rubberized feet ensures stability on any desktop surface.
Design and Features
The rear panel houses two USB-C ports (one for data, one for power), a 3.5mm variable line output, and both 3.5mm single-ended and 4.4mm Pentaconn balanced headphone outputs. While I initially wondered about the rear-panel placement of the headphone jacks, the design ultimately proved functional.
The front panel features a series of LEDs providing comprehensive feedback on volume level, MQA decoding, USB audio class, DSD playback, and output selection (headphone or line out). A notable feature is the independent volume memory for both headphone and line outputs.
User Experience and Functionality
The M20’s operation is intuitive, though I found the 35 volume steps slightly limiting, lacking the fine-grained control I prefer. A gain setting could improve this. The LED lighting, particularly the under-chassis lights, is initially a distraction.
However, a firmware update addresses this, providing the option to disable the under-chassis LEDs, improving the overall aesthetic. The menu navigation is straightforward and provides access to filter options and USB audio class selection.
Sound Quality and Performance
The sound quality of the Lin.Lin M20 is impressive. It delivers detailed audio reproduction with a wide soundstage and excellent layering, considering its price point. The sound signature is smooth and pleasant, avoiding any harshness or aggression.
While not as powerful as some higher-end alternatives like the SMSL C200 Pro or the FiiO K1 R2R, the M20 still offers superior detail without sounding sharp or fatiguing. The overall listening experience is exceptionally smooth and organic.
Conclusion and Verdict
The SMSL Lin.Lin M20 is a compelling USB DAC/headphone amp that offers excellent sound quality and a well-built design for its price. The smooth, detailed sound signature is its standout feature. While lacking the power of some competitors and a few extra features (like additional inputs), its strengths outweigh the minor shortcomings.
The ability to disable the distracting LEDs via firmware update is a significant plus. The M20 is a strong contender in its price range and my top recommendation for a desktop DAC/headphone amp under $200, if the power output and input options meet your needs.