Headphone amplifier with DAC
Earmen ST-Amp

Headphone amplifier with DAC

Earmen ST-Amp

5 reviews

AED 2,599

Product code: 131107

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Description

EarMan ST-Amp is a fully balanced desktop headphone amplifier with a preamp option and built-in DAC. It delivers exceptional sound quality, whether it is used with the built-in DAC or an external one, which is a priority for those who want to have everything in one device. The amplifier has protection against unpleasant pops and clicks when turning it on or off.

Features:

  • High output power
  • Preamp function
  • Built-in USB DAC
  • Ultra-low distortion

Balanced amplification even for a 6.3 mm output

The amplifier operates on a balanced circuit, which means the input signal becomes even cleaner and of higher quality. The same topology is used for the single 6.3 mm output, enabling balanced amplification without phase shift, additional noise, or distortions. Therefore, the sound from the 6.3 mm output is on par in terms of quality with the sound from the balanced output.

The headphone output is powered by two TPA6120 operational amplifiers, which have received high praise in the audiophile world. To ensure comprehensive amplification, the ST-Amp incorporates a high-quality balanced potentiometer from ALPS, which helps maintain consistent sound and ensures the satisfaction of the owner.

Sound capabilities

The ST-Amp does not influence the sound in a way that would enhance the distinctive character of your DAC. Although many DACs have excellent technical specifications, they alone are not enough for the sound to fully manifest itself. The ST-Amp utilizes the maximum potential of the dynamic range, revealing every detail of the audio source, so you won't miss a single nuance. Moreover, it effortlessly drives various headphones, thereby enhancing accuracy, neutrality, and transparency during listening.

The amplifier boasts high output power, providing 4V and 500mW into a 32-ohm load when connected to the SE output (6.3mm). With an impressive 7.75V and 1.85W into a 32-ohm load on the balanced output (4.4mm Pentaconn), it can easily drive even complex planar magnetic headphones.

Inputs RCA / USB - Output 6.3 mm

Input 6.3 mm - Balanced output Balanced input - Output 6.3 mm Balanced input - Balanced output

Input: 2V 2V 4V 4V

Output: 4V (0.5W at 32 Ohms) 7.75V (1.85W at 32 Ohms) 0.5V (0.5W at 32 Ohms) 7.756V (1.85W at 32 Ohms)

Distortions : 0.0025% 0.003% 0.0025% 0.002%

Signal-to-Noise Ratio: 117 dB 121 dB 118 dB 125 dB

Dynamic Range: 117.9 dB 121 dB 118 dB 125 dB

Dynamic Range

A dynamic range greater than 121 dB guarantees you a vibrant sound and musicality, allowing you to never feel like you're missing out on anything. With perfectly balanced sound and incredible dynamics, you'll feel like you're in a concert hall.

Preamp Function

On the device's rear panel, you'll find SE and BAL preamp outputs for balanced and unbalanced signals. This option allows you to use the ST-Amp as a DAC and preamp for a much more powerful system.

Ultra-Low Distortion

Low Total Harmonic Distortion (THD) is an important characteristic, and the engineers at EarMen take it very seriously. The ST-Amp has very low total harmonic distortion, allowing for increased power efficiency, reduced peak currents, and distortion-free operation.

Linear power supply with high efficiency

The amplifier features a noiseless linear power supply with high stability, allowing it to easily provide sufficient output power even for the most demanding headphones. In addition to the unique amplifier topology, the power supply has exceptional characteristics even at full power, which is often not the case with most amplifiers, so in their specifications, you may find measurements, but at half power.

Package includes:

  • amplifier
  • documentation

Characteristics

  • Brand
  • Power output

    This is the useful power developed by the amplifier in the load resistance. Amplifiers are usually characterized by the highest power that can be obtained at the output, provided that the distortion does not exceed the specified permissible value. This power is called the output power of the amplifier.

    Glossary of terms
    1.85
  • The lowest frequency, Hz
    20
  • The highest frequency, kHz

    The upper limit of the frequencies reproduced by the device. The human ear hears the standard frequency range: 20 Hz – 20000 Hz.

    Glossary of terms
    20
  • Sampling rate, kHz

    The sampling frequency of a time-continuous signal during its sampling

    Glossary of terms
    384
  • Signal-to-noise ratio, dB

    The higher signal-to-noise ratio, the clearer sound and the bigger the dynamic range provided by the system

    Glossary of terms
    120
  • DSD support

    Direct Stream Digital is a single bit audio format developed by Sony and Philips. It uses density-pulse modulation coding (a kind of sigma-delta modulation) and is used to store records on SACD

    Glossary of terms
    yes
  • Output connectors
    RCA, 4.4mm jack
  • Circuit design
    discrete

    The circuit with transistors used.

    Словарь терминов
  • Preamplifier

    A preamp is used as a hub to connect other components of the audio system. The preamp can be either integrated, or an autonomous device.

    Glossary of terms
    yes
  • Input connectors
    RCA, 4.4mm jack
  • DAC chip

    The chip used for digital-to-analog conversion

    Glossary of terms
    ES9280
  • DAC bit depth, bits
    32
  • Internal DAC
    yes
  • Color
  • Connecting to a computer via USB
    yes
  • Form factor
    stationary

    For use on a table or in a rack.

    Словарь терминов
  • Material
    aluminum
  • Playback via USB
    yes

    Playing music files via USB

    Словарь терминов
  • Headphone output
    4.4mm jack, 6.35mm jack
  • Power, W
    1.85
  • Depth, mm
    170
  • Height, mm
    30
  • Width, mm
    150
  • Weight, g
    1100
  • Country of origin

    The country of origin may differ from the declared one. Production facilities may be located in several states. All brand factories operate according to general standards, and finished products undergo appropriate control.

    Serbia
  • Service life, months
    24
  • Warranty, months
    12
  • Show all characteristicsShow fewer characteristics

Reviews 5

Reviews

Rohan from Dubai15.11.2024
5
The sound is neutral and detailed, and it pairs beautifully with my planar magnetic headphones. My only wish is for more input options.
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Amal Noor from Dubai06.10.2024
5
The power output is incredible for its size. My planar headphones sound phenomenal, and the built-in DAC is a fantastic bonus.
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Luca from Dubai16.09.2024
5
This little amp packs a punch! The sound quality is fantastic, with a neutral and transparent profile that brings out the best in my headphones. The ALPS potentiometer adds a premium feel, and the balanced output offers impressive power. However, the chassis gets slightly warm during long sessions, so improved heat dissipation would be a welcome addition.
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Khaled M. from Dubai09.08.2024
5
The ST-Amp is an absolute powerhouse. It effortlessly drives my high-impedance headphones, delivering rich, distortion-free sound across all genres. The built-in DAC works beautifully, but even with an external DAC, the amp showcases its neutral, dynamic performance. The design also minimizes annoying pops and clicks. Very happy with this AMP!!!
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Product rating

5.0

(based on 5 reviews)
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Earmen ST-Amp

5 reviews

AED 2,599