Name: EarMen CH-Amp
Brand: EarMen
SKU: 9972
Availability: InStock

Description

Earmen, a step further…

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. EarMen designed a desktop fully balanced headphone amplifier with excellent features and a linear power supply unit.

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, 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 have 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.

Exceptional workmanship

CH-Amp is born from a full block aluminum chassis, which makes it extremely durable and robust. Compact design makes it fitting to any environment, any 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

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 inside the device.

Extra Low Linear Power Supply

With the CH-Amp you also get linear low noise power supply that are made without compromise, using the best components and the latest circut design. EarMen Linear power supply is reliable, simplistic and produce 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 circuit 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.

Specification

Inputs

Line 1	RCA Single End Input	Input Sensitivity = 2V
Line 2	RCA Single End Input	Input Sensitivity = 2V
Line 3	Balanced 4.4 mm	Input Sensitivity = 4V

Headphone Outputs

SE 6.35mm	output impedance = <1 Ω
Balanced 4.4mm	output impedance = <1 Ω

Video

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Pro Reviews

The EarMen CH-Amp is aptly named with no need for a timeout as it is always ready to land punches as an insightful headphone amplifier in delivering a transparent and smooth sound.

It isn’t every day that we see an amplifier coming in default with a custom-built external power supply. So, it may not be immediately obvious looking at the deceptively understated mien, but everything EarMen has done is in one way or another a form of answer in their quest for great sound.

Depending on what you’re looking for in an amplifier, the positives of this setup are detail retrieval and its dark background. But tuned on to the exciting side of the spectrum, pair it poorly and the dreamlike impression will quickly fade away once fatigue sets in.

With a lot to like and only a few minor quirks to get around, this amp from EarMen will surely be a reliable partner for a lot of audio enthusiasts out there.

The more you listen to the CH-Amp the better it gets. It’s especially noticeable when you listen to another amp for a while and then go back to it with the same headphone.

The EarMen CH-Amp is precise, clean, fast, transparent, and always musical. It works sublimely in the full EarMen stack, but you can perfectly use it with any DAC or source. The fully balanced CH-Amp comes with the PSU-3 and it sells for $1,480 USD. That might seem expensive, and it’s more than I expected it to cost, but the EarMen engineers really did their work on this one. Big sound in a small package is what you get from EarMen’s CH-Amp, and as such it’s extremely easy for me to give it our Recommended Buy award. It from now on is added to our recommended amplifier buy list.