Details：

Reference Bayern power A1 headphone amplifier original circuit design, combined with our designers to redesign and improve the design of the A1 professional headphone amplifier, with professional-level monitoring sound quality

ALPS 27 potentiometer

Work voltage: AC110V and AC220V optional

Copper R-core transformer

Full aluminum chassis

Use excellent Taiwan brand switch, feel and reliability is very good

Use the Japanese high Ze Ze signal dedicated relay

Regulators used LM317,337

Use an integrated design to avoid external connections

Using Japanese brand-name capacitors

Symmetrical design, optimized alignment, with star grounding, excellent separation

Frequency response (from 40 Hz to 15 kHz), dB：+0.03, -0.12

Noise level, dB (A) ：-94.9

Dynamic range, dB (A)：94.8

THD, % ：0.0011
THD + Noise, dB (A) ：-88.2
IMD + Noise, % ：0.024
Stereo crosstalk, dB ：-92.1
IMD at 10 kHz, % ：0.0053

Package included：

Finished A1 headphone x 1

Not included any cables ！

Custom Duties & Taxes

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2. Avoiding some unnecessary trouble, please check with your country's customs office to inform us what we should declare its value before shipping.