EarMen CH-AMP Headphone Amplifier / PSU-3 Power Supply

Here we have a fully balanced desktop headphone amp/preamp from EarMen. It is in good condition with a small mark on the front right corner of the unit – please refer to photographs. It is supplied in original factory condition along with remote control, manual, various cables and our regular three month warranty.
EarMen Say….
After the successful launch of small portable devices at the market, EarMen has taken it a step further and prepared specially designed line of devices for you, that will give you real and unique pleasure in listening to music. Introducing EarMen CH-Amp, 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.
The 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.
CH-Amp offers two key features: preamp outs and a gain switch. 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. Tailor your audio experience to perfection with EarMen CH-Amp.
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. Enjoy a reliable and long-lasting audio companion with EarMen CH-Amp.
EarMen 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. Say goodbye to unwanted artifacts and immerse yourself in pure audio bliss.
With the CH-Amp, you also receive an extra low noise linear power supply 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.
The EarMen Linear power supply can be seamlessly connected to the EarMen Tradutto DAC and EarMen Staccato Streamer, transforming your setup into a powerful all-in-one audio system. Enjoy the convenience and flexibility of a unified audio solution without compromising on performance.
Features:
External low noise linear power supply
Composite amplifier topology
Output power up to 3.8W
Fully balanced architecture
Gain control
Ultra-low THD and SNR
Aluminium chassis
Remote controller
Specifications:
Inputs: L 1 – RCA; L 2 – RCA; L 3 – Balanced 4.4 mm
Outputs: SE – 6.35 mm; Balanced – 4.4 mm
Pre Outputs: RCA – SE output; Balanced – 4.4 mm
Dimensions: 150 (W) x 150 (D) x 30 (H) mm; PSU: 150 (W) x 150 (D) x 60 (H) mm
Weight: 550 g; PSU: 1590 g
Single-ended output:
Output Level: 7 Vrms (SE); 11 Vrms (BAL)
Max Power: 1.5 W (SE); 3.8 W (BAL)
THD+N: 0.0008% (SE); 0.0005% (BAL)
SNR: > 116 dB (SE); > 118 dB (BAL)
Frequency Response: ± 0.005 dB (SE); ± 0.005 dB (BAL)
Fully Balanced Output:
Output Level: 7 Vrms (SE); 11 Vrms (BAL)
Max Power: 1.5 W (SE); 3,8 W (BAL)
THD+N: 0.0008% (SE); 0.0007% (BAL)
SNR: > 118 dB (SE); > 119 dB (BAL)
Frequency Response: ± 0.005 dB (SE); ± 0.005 dB (BAL)
SE Gain: 6.35 mm – 7 V (1.5 W/32 Ω) (High); 2.9 V (260 mW/32 Ω) (Low)
Balanced Gain: 4.4 mm – 11 V (3.8 W/32 Ω) (High); 5.5 V (1 W/32 Ω) (Low)
Output Level: 4 V (SE); 8V (BAL)
Output Impedance: 100 Ω (SE); 200 Ω (BAL)