High Gain
The AK380 AMP supports 8.1 VRMS output when connected via high-gain balanced output. 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's settings. (When the AK380 AMP is connected, USB DAC and optical out functionalities through the amplifier are disabled.)
Audio Block
3,400 mAh Large-capacity Battery
An amplifier, which increases audio output, consumes a great amount of energy. Thus, the AK380 AMP features a 3,400 mAh large-capacity battery – identical to the one in the AK380 itself - to support up to nine hours of continuous unbalanced-output playback.
AK380 AMP vs. Other AMP
The AK380 AMP boasts convenient portability. The many points of discomfort in conventional amplifiers have been addressed by adopting an integrated design for greater convenience.
Integrated Design
The AK380 AMP was designed as an extension of the light and shadow theme of the AK380. Continuing this design concept, the AK380 AMP 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 is repeated on the amplifier's rear light for design continuity. The area of the amplifier in contact with the AK380'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 was designed from the ground up as a single entity when combined with the AK380. 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.
Specifications
Model
AK380 COPPER AMP
Body Color
Copper
Body Material
Copper
Output Level
[Low Gain] Unbalanced 2.1 VRMS / Balanced 2.1 VRMS (Condition: No Load)
[High Gain] Unbalanced 4.1 VRMS / Balanced 8.1 VRMS (Condition: No Load)
Input
Type-B micro-USB Input (Charging & data transfer (PC & Mac))
/ Connection Mode: MTP (Media Device)
Outputs
PHONES (3.5mm) / Balanced Out (2.5mm, only 4-pole supported)
Dimensions
3.17 ”(80.7 mm) [W] x 5.01 ”(128.4 mm) [H] x 0.40 ”(10.3 mm) [D]
Weight
10.30 oz (292 g)
Audio Performance
Signal to Noise Ratio
[Low Gain] 110 dB @ 1 kHz, Unbalanced / 110 dB @ 1 kHz, Balanced
[High Gain] 113 dB @ 1 kHz, Unbalanced / 114 dB @ 1 kHz, Balanced
Crosstalk
[Low Gain] 108 dB @ 1 kHz, Unbalanced / 130 dB @ 1 kHz, Balanced
[High Gain] 108 dB @ 1 kHz, Unbalanced / 128 dB @ 1 kHz, Balanced
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