Measurement's report Astell&Kern AK380 AMP Unbalanced Norm - Reference Audio Analyzer

Reports / Astell&Kern / AK380 AMP / Unbalanced Norm / A set of device tests as a headphone amplifier - report for a pro

Test report Astell&Kern AK380 AMP: Unbalanced Norm (report for a pro)

About this report
This is a report for professionals with a suite of test of headphone amplifier.
You can see a simple report for "dummies" with explanations of the main characteristics for Astell&Kern AK380 AMP Unbalanced Norm

A suite of tests for a headphone amplifier can be applied to just a universal output without a formal presence of an amplifier, if in this mode you can connect headphones to this output. Based on the results of the tests, you can understand the real picture, is the output powerful enough or not, with the initial data on the circuitry as a "black box".

Test report - general data Astell&Kern AK380 AMP (as headphone amplifier)

Frequency response, Impedance and Frequency response with standard headphones

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Voltage levels from the load at the output of the amplifier

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Average value of impedance band in 40 Hz - 15 kHz0.7ohm
Voltage:
Pure or equal class A / Maximum or before clipping level
5.3/5.3dBV
1.8/1.8VRMS
Current:
Pure or equal class A / Maximum or before clipping level
19.3/35.1dB(mA)
9.2/57.2mA






Frequency response Astell&Kern AK380 AMP Unbalanced Norm (as headphone amplifier)

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Channel

Range

Channel:LeftRight
Variation in frequency response in band from 40 Hz - 15 kHz -0.2, +0.1-0.2, +0.1dB


Brief information

Clicking on the graph will take you to the comparison page of different headphone models with advanced graph display settings.



Impedance Astell&Kern AK380 AMP Unbalanced Norm (as headphone amplifier)

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Channel

Channel:LeftRight
Impedance average in band from 40 Hz - 15 kHz0.6 0.7ohm
The minimum value in band from 40 Hz - 15 kHz0.6 0.7ohm
The maximum value in band from 40 Hz - 15 kHz0.6 0.7ohm


Comparison of basic characteristics AMPs

Brief information

Clicking on the graph will take you to the comparison page of different headphone models with advanced graph display settings.



Crosstalk Astell&Kern AK380 AMP Unbalanced Norm (as headphone amplifier)

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Channel

Range

Load

Channel:LeftRight
Crosstalk @ 1 kHz @ 15.8 ohm -47.7 -44.1dB
Crosstalk @ 1 kHz @ 24.5 ohm -50.1 -47.0dB
Crosstalk @ 1 kHz @ 30.5 ohm -51.9 -48.9dB
Crosstalk @ 1 kHz @ 62.4 ohm -57.9 -55.0dB
Crosstalk @ 1 kHz @ 100.0 ohm -62.0 -59.0dB
Crosstalk @ 1 kHz @ 198.9 ohm -66.2 -63.9dB
Crosstalk @ 1 kHz @ 300.0 ohm -69.6 -67.5dB
Crosstalk @ 1 kHz @ 763.0 ohm -77.5 -75.9dB
Crosstalk @ 1 kHz @ Not loaded-90.9 -88.8dB


Brief information

Clicking on the graph will take you to the comparison page of different headphone models with advanced graph display settings.



Crosstalk Phase Astell&Kern AK380 AMP Unbalanced Norm (as headphone amplifier)

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Channel

Load



Brief information

Clicking on the graph will take you to the comparison page of different headphone models with advanced graph display settings.



Frequency response Astell&Kern AK380 AMP Unbalanced Norm with resistive load

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Frequency response of amplifier with resistive load @ 40 Hz - 15 kHz
Channel:LeftRight
HP 16 Ω + Astell&Kern AK380 AMP Unbalanced Norm 0.00.0dB
HP 32 Ω + Astell&Kern AK380 AMP Unbalanced Norm 0.00.0dB
HP 64 Ω + Astell&Kern AK380 AMP Unbalanced Norm 0.00.0dB
HP 126 Ω + Astell&Kern AK380 AMP Unbalanced Norm 0.00.0dB
HP 256 Ω + Astell&Kern AK380 AMP Unbalanced Norm 0.00.0dB
HP 512 Ω + Astell&Kern AK380 AMP Unbalanced Norm 0.00.0dB


Brief information

Clicking on the graph will take you to the comparison page of different headphone models with advanced graph display settings.



Frequency response Astell&Kern AK380 AMP Unbalanced Norm loaded dynamic headphone type

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Frequency response of amplifier loaded dynamic headphone type @ 40 Hz - 15 kHz
Channel:LeftRight
HP 10000 Ω + Astell&Kern AK380 AMP Unbalanced Norm 0.00.0dB
Grado GH4 Limited Edition + Astell&Kern AK380 AMP Unbalanced Norm 0.10.1dB


Brief information

Clicking on the graph will take you to the comparison page of different headphone models with advanced graph display settings.



Frequency response Astell&Kern AK380 AMP Unbalanced Norm loaded type balance armature headphone type

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Channel

Range

Frequency response of amplifier loaded type balance armature headphone type @ 40 Hz - 15 kHz
Channel:LeftRight
HP 10000 Ω + Astell&Kern AK380 AMP Unbalanced Norm 0.00.0dB
Campfire Audio Andromeda + Astell&Kern AK380 AMP Unbalanced Norm 1.21.2dB
Fearless Audio S8F Freedom + Astell&Kern AK380 AMP Unbalanced Norm 1.00.9dB


Brief information

Clicking on the graph will take you to the comparison page of different headphone models with advanced graph display settings.



THD vs load vs output voltage Astell&Kern AK380 AMP Unbalanced Norm

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Channel

Load

Harmonic, number

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Load

Harmonic, number

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Channel

Load

Brief information

Clicking on the graph will take you to the comparison page of different headphone models with advanced graph display settings.



Maximum voltage output level vs load Astell&Kern AK380 AMP Unbalanced Norm

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Type of chart

RAW coordinates

Power characteristics of the Voltage Current
dBVVRMSdB(mA)mA
Equivalent class A 5.31.819.39.2
Equivalent class AB 5.31.829.329.1
Equivalent class B 5.31.832.341.0
Maximum mode 5.31.835.157.2


Volume Control TypeDigital
Optimal range of volume control36.0dB
Signal/Noise / Maximum106.0/5.3dB/dBV
Signal/Noise @ -14.9 dBV 32 ohm (1 mW)85.91dB
Signal/Noise @ -5.2 dBV 300 ohm (1 mW)95.47dB


Comparison Astell&Kern AK380 AMP Unbalanced Norm and another amplifiers by loudness (Volume Level)

Main characteristics of the Astell&Kern AK380 AMP Unbalanced Norm

Brief information

Clicking on the graph will take you to the comparison page of different headphone models with advanced graph display settings.



Maximum voltage output level vs load Astell&Kern AK380 AMP Unbalanced Norm

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