EarMen CH-Amp Fully Balanced Desktop Headphone Amplifier + Preamp

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Introducing the CH-Amp, by EarMen. A desktop, fully balanced headphone amplifier designed to deliver exceptional audio performance and enhance your music listening pleasure. With outstanding features and a robust linear power supply unit, CH-Amp sets a new standard in desktop audio amplification.

CH-Amp incorporates a Composite Amplifier Topology, combining the best of both worlds with excellent DC and AC characteristics. Unlike traditional power amplifiers that can experience errors and performance degradation when driving heavy loads, the composite op-amp eliminates these issues, ensuring optimal circuit performance. Benefit from improved DC output-offset and enhanced overall circuitry performance with the CH-Amp.

EarMen CH-Amp is meticulously crafted with high-quality components, including WIMA capacitors, audio electrolytes, MELF low noise resistors, and SoundPlus OPA1642 operational amplifiers. This carefully chosen combination results in a neutral sound signature and exceptional characteristics, including low signal-to-noise ratio, ultra-low Total Harmonic Distortion (THD), and excellent frequency response. Experience pristine audio reproduction and plenty of power, even under high loads.

Take advantage of the balanced and single-ended preamp outputs, allowing you to connect powered monitors for a complete audio system. The gain switch provides precise control over output level and impedance, ensuring optimal matching with your headphones.

CH-Amp features a full block aluminium chassis, guaranteeing durability and robustness. Its compact design allows seamless integration into any environment or home audio system. The PCB is securely embedded within the solid aluminium housing, providing enhanced protection and insulation against external influences.

CH-Amp embraces a fully balanced architecture, preserving the integrity of the audio signal from the source to the output. The balanced outputs remain intact and are only amplified, ensuring pristine sound reproduction. The single-ended inputs are expertly converted to balanced signals without phase shift or imbalance, guaranteeing optimal phase alignment.

Included is an extra-low-noise Linear Power Supply PSU-3, designed without compromise, using top-of-the-line components and the latest circuit design techniques. EarMen's linear power supply is both reliable and simplistic, producing minimal noise for an undistorted audio experience. It is custom-made for our devices to deliver exceptional efficiency and exceed your expectations. Furthermore, it includes protection against current overload, short circuit, and thermal overload, adhering to the highest safety standards.


  • External low noise linear power supply (LPSU).
  • Composite amplifier topology.
  • Output power up to 3.8 W.
  • Fully balanced architecture.
  • Gain control.
  • Ultra low THD and SNR.
  • Aluminium chassis.
  • Remote control.


  • Inputs: L1 RCA, L2 RCA, L3 Balanced 4.4 mm
  • Outputs: SE 6.35 mm, Balanced 4.4 mm
  • Pre Outputs: RCA SE output, Balanced 4.4 mm
  • Dimensions: 150 x 30 x 150 mm
  • Weight: 550 g
  • PSU Dimensions: 150 x 60 x 150 mm
  • PSU Weight: 1590 gr
  • Single-Ended Output:
    • Output Level: SE 7 Vrms, BAL 11 Vrms
    • Max Power: SE 1.5 W, BAL 3.8 W
    • THD+N: SE 0.0008 %, BAL 0.0005 %
    • SNR: SE >116 dB, BAL >118 dB
    • Freq. Response: SE ±0.005 dB, BAL ±0.005 dB
  • Fully-Balanced Output:
    • Output Level: SE 7 Vrms, BAL 11 Vrms
    • Max Power: SE 1.5 W, BAL 3.8 W
    • THD+N: SE 0.0008 %, BAL 0.0007 %
    • SNR: SE >118 dB, BAL >119 dB
    • Freq. Response: SE ±0.005 dB, BAL ±0.005 dB


  • 1 x CH-Amp Headphone Amplifier.
  • 1 x PSU-3 Linear Power Supply.
  • 1 x Remote Control.
  • 1 x user Manual.

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