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SMSL H200 – Hi-res Headphone AMP &PRE AMP with PLFC+Circuit Design

Kitty (S.M.S.L Marketing)

Member
Audio Company
Joined
Aug 5, 2025
Messages
34
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Hello ASR members,

We're excited to introduce the H200, our new high-resolution audio interface designed to deliver exceptional sound quality for both professional and desktop audio applications.

Whether you're a headphone enthusiast, a content creator, or someone who simply appreciates high-fidelity audio, the H200 is built to elevate your listening experience.
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Key Features:

  • Fully Balanced Discrete Circuit: The H200 features a fully balanced discrete PLFC+ circuit, precision-built with carefully selected components.
  • Ultra-Low Distortion, Wideband High Resolution: The H200 achieves an ultra-low distortion (THD+N) of just 0.00007% and an SNR of up to 131dB – delivering a pitch-black background and pure, authentic sound reproduction.
  • Dual Function: Headphone Amp & Pre-Amplifier: The H200 is not only a headphone amplifier but can also function as a preamplifier, allowing for easy connection to active speakers or a power amplifier.
  • Linear Regulated Power Supply for Stable Output: The H200 is equipped with a custom high-power linear power supply, providing clean, stable power even during demanding dynamic passages.



Pure, Lossless Signal – Fully Balanced Discrete PLFC+ Circuit
The H200 features a fully balanced discrete PLFC+ circuit design. Unlike conventional integrated chip solutions, the PLFC+ circuit is precision-built with carefully selected discrete components, maintaining a true balanced architecture from signal input to output – effectively eliminating common-mode interference and preserving the music's original dynamics and detail.


Three-Level Gain Adjustment for Precise Matching

The H200 is equipped with three switchable gain levels – Low, Medium, and High – ensuring optimal performance across a wide range of headphones and IEMs.

Low Gain: Specifically optimized for high-sensitivity IEMs (in-ear monitors). The noise floor is virtually inaudible, allowing every subtle detail to shine through with exceptional clarity.

Medium Gain: Perfectly suited for most over-ear headphones, delivering a balanced, composed, and natural sound signature.

High Gain: Provides ample driving power for high-impedance, low-sensitivity flagship headphones, unleashing their full potential


Linear Regulated Power Supply for Stable, Long-Lasting Output

The H200 is equipped with a custom high-power linear power supply, providing the unit with a continuous and exceptionally pure power source – capable of handling even the most demanding dynamic music passages with ease. Precision-selected, low-temperature-coefficient resistors ensure that performance remains unaffected by ambient temperature changes, keeping the unit in peak operating condition at all times. Multiple protection circuits – including DC protection, overvoltage protection, and overload protection – safeguard both the device and your headphones around the clock for peace of mind.



Redefining the Boundaries of Sound – Ultra-Low Distortion, Wideband High Resolution
The H200 achieves an ultra-low distortion (THD+N) of just 0.00007% and an impressive signal-to-noise ratio of up to 131dB, reducing noise and coloration to near-inaudible levels. This delivers a pitch-black background and pure, authentic sound reproduction. With a wide frequency response ranging from 20Hz to 100kHz (-0.5dB), the H200 effortlessly captures every subtle nuance of high-resolution audio.

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Functional Design

  • Balanced & Unbalanced Inputs/Outputs: Balanced inputs reduce interference between channels, delivering cleaner, more accurate sound reproduction.
  • Remote Control: A full-featured remote control is included for convenient, effortless operation.
  • Compact & Durable Build: Designed with a robust chassis, the H200 fits neatly into any desktop setup.

H200详情页英文_15(1).png



Technical Specifications:

ParameterSpecification
Frequency Response20Hz – 100kHz
Gain LevelsLow / Medium / High
SNR131dB
InputsBalanced,Unbalancced
Headphone Outputs4.4mm Balanced,6.35mm Unbalanced
Pre-outputsBalanced,Unbalancced
THD+N-122dB,0.00007%
Display Panel1.9" IPS LCD

H200 – High Resolution Audio Interface

Professional sound. Desktop-friendly design.


For more details, please visit our official website: https://www.smsl-audio.com/portal/product/detail/id/950.html

We look forward to hearing your thoughts!
 
It's "high resolution"!
 
I'm happy SMSL sent me one but I got too busy lately to publish the review, and this one unit will keep me busy in terms of measurements to be exhaustive.

The gain settings also impact the rear outputs, which is nice. The below is the best measurement I got so far, and I think it was 4Vrms, but maybe 5Vrms (Medium gain, vol at max):

1787996306635.png


My notes appear to be partially wrong or missing, so I have to start all over again.

Cheers

Flo
 
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