$2,650.00
EarMen CH-Amp Fully Balanced Headphone Amplifier
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EarMen-CH-Amp-Headphone-Amplifier
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EarMen CH-Amp Fully Balanced Headphone Amplifier is designed with a full-block aluminum chassis, which makes it extremely durable and robust. Compact design makes it fitting to any environment, system, or home. The PCB is embedded in a solid aluminum housing, giving the board greater protection inside the housing and additional insulation from external influences.
Composite Amplifier Topology
A Composite Amplifier Topology is implemented in the CH-Amp. Composite op-amp brings the best of both worlds with excellent DC and AC characteristics. These amplifiers offer several advantages over other types of amplifiers.
Power amplifiers typically use thermal feedback loops, thus causing serious errors while driving heavy loads. These errors occur due to self-heating. The use of the composite can remove such errors and improves the performance of the circuitry. The composite amplifiers also offer better DC output offset. The excess of the load placed on the output transistors does not affect offset voltage.
Design
We used WIMA capacitors as well as audio electrolytes in combination with MELF low noise resistors and SoundPlus OPA1642 operational amplifiers which proved to be great for getting neutral sound. EarMen CH-Amp has excellent characteristics, a very low signal-to-noise ratio, and THD, excellent frequency response, and a lot of power where the characteristics of the device are changed very little even at high loads.
EarMen CH-Amp has two important features: preamp outs and a gain switch. CH-Amp has balanced and single-ended preamp outputs, so you can connect to powered monitors for a complete system. The gain switch gives you better control of both output level and impedance, for better matching to your headphones.
Fully Balanced Architecture
EarMen CH-Amp is a fully Balanced Headphone Amplifier which means that the balanced outputs from the source go to the output intact, only amplified. From the Single-end input, the signals are converted to balanced without phase shift (phase imbalance), so that the obtained + and - signals are perfectly in phase. In this way, we remove unwanted forests and prevent them from being added to the device.
| Single-ended output | |||
| SE Input | BAL Input | ||
| Output Level | 7Vrms | 11Vrms | |
| Max Power | 1,5 W | 3,8 W | |
| THD+N | 0.0008% | 0.0005% | |
| SNR | >116dB | >118dB | |
| Freq. Response | ±0.005dB | ±0.005dB | |
| Fully Balanced Output | |||
| SE Input | BAL Input | ||
| Output Level | 7Vrms | 11Vrms | |
| Max Power | 1,5 W | 3,8 W | |
| THD+N | 0.0008% | 0.0007% | |
| SNR | >118B | >119dB | |
| Freq. Response | ±0.005dB | ±0.005dB | |
Extra Low Linear Power Supply
With the CH-Amp you also get a linear low-noise power supply that is made without compromise, using the best components and the latest circuit design. EarMen Linear power supply is reliable, simplistic, and produces minimal noise.
It is made only for the needs of our devices in order to get the best characteristics and efficiency and is specially designed to exceed your expectations. It also has protection against current overload, short circuits, and thermal overload according to the highest safety standards.
The big advantage of this power supply is that you can connect it to the EarMen Tradutto DAC and EarMen Staccato Streamer and get a great all-in-one system.
Key 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
- Aluminum chassis
- Remote controller