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AK380 Copper's First Accessory, AMP AK380 AMP

AK380 Copper's First Accessory, AMP

The primary goal of Astell&Kern has always been to deliver the original sound.

We're proud to introduce the AK380 AMP Copper, an amplifier that supports high-impedance headphones and high-gain output while remaining faithful to the original sound.

Introducing AK380 AMP Copper, the first accessory to complement the AK380 Copper.

  • Expansion-type amplifier with design unity.
  • 3,400 mAh large-capacity battery.
  • 8.1 VRMS high-gain balanced output.
  • 4.1 VRMS unbalanced output.

A New Approach to Music,
AK380 AMP Copper

Astell&Kern aims to match AK380 Copper and deliver the acoustic characteristics of raw material, copper through AMP as well.
Characteristics of raw material, Copper
"Sound with a sense of depth"
"Sound with a sense of weight"
"Sound with a greater balance" Advantages of AK380 AMP
"Expandable AMP with a harmonious combination of raw material and design"
"HIGH GAIN output of 8.1 Vrms" A combination of AK380 Copper and AMP
Copper extends the characteristics of raw material, copper to the player and AMP as well to deliver better sound quality than the old AK380 duralumin and AMP aluminium combination.


AK380 AMP Copper supports 8.1 VRMS output when connected via high-gain balanced output.

  • High Gain: Unbalance 4.1 Vrms / Balance 8.1 Vrms (Condition No Load)
  • Low Gain: Unbalance 2.1 Vrms / Balance 2.1 Vrms (Condition No Load)

High-gain output is four times greater than low-gain output and supports high-impedance headphones.
To protect earphones/headphones during high output, the volume is automatically adjusted when the amp is powered on or the earphones/headphones are disconnected.
Furthermore, the gain can be easily adjusted via the AK380 Copper's settings.

* When the AK380 AMP Copper is connected, USB DAC and optical out functionalities through the amplifier are disabled.

* Amp powered on : Yes
* Earphones / headphones disconnected : Yes
* GAIN Changed : Yes



3,400 mAh Large-capacity Battery


An amplifier, which increases audio output, consumes a great amount of energy. Thus, the AK380 AMP Copper features a 3,400 mAh large-capacity battery
- identical to the one in the AK380 Copper itself - to support up to nine hours of continuous unbalanced-output playback.

AK380 AMP Copper vs. Other AMP

The AK380 AMP Copper boasts convenient portability.

The many points of discomfort in conventional amplifiers have been addressed by adopting an integrated design for greater convenience.

AK380 AMP Copper
Other AMP
  • Charging AK380 Copper + AK380 AMP Copper simultaneous charging. Separate charging of device and amp.
  • Connections Separate cable not required due to integrated design.
    Easy connection using a Screw Cap.
    Separate cable for connecting device and amp.
    Device and amp connection via separate band.
  • Volume Control Integrated volume control using the AK380 Copper. Separate volume controls for device and amp.

Integrated Design

The AK380 AMP Copper was designed as an extension of the light and shadow theme of the AK380 Copper.

Continuing this design concept, the AK380 AMP Copper retains the subtle changes and details in the emitted brilliance as light flows across its surface.
The diamond pattern engraved into the volume wheel of AK380 Copper is repeated on the amplifier's rear light for design continuity.

The area of the amplifier in contact with the AK380 Copper's volume wheel reproduces the design's angle of reflection for comfortable wheel operation.
The amplifier's light shining delicately through the gaps in the reflected surface visually accentuate the music’s mystique.

Unlike conventional amplifiers, the AK380 AMP Copper was designed from the ground up as a single entity when combined with the AK380 Copper.
The wheel on the rear of the amplifier that connects the two devices is a representation of the volume wheel seen throughout Astell&Kern products and expresses our unique design identity.