Measurement's report Cowon D2 Plus - Reference Audio Analyzer

Reports / Cowon / D2 Plus / A set of device tests as a headphone amplifier - report for a pro

Test report Cowon D2 Plus (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 Cowon D2 Plus

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 Cowon D2 Plus (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 kHz1.8ohm
Voltage:
Pure or equal class A / Maximum or before clipping level
-3.1/-1.1dBV
0.7/0.9VRMS
Current:
Pure or equal class A / Maximum or before clipping level
-17.7/30.9dB(mA)
0.1/34.9mA






Frequency response Cowon D2 Plus (as headphone amplifier)

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Channel

Range

Channel:LeftRight
Variation in frequency response in band from 40 Hz - 15 kHz -0.0, +0.0-0.0, +0.0dB


Brief information

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



Impedance Cowon D2 Plus (as headphone amplifier)

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Channel

Channel:LeftRight
Impedance average in band from 40 Hz - 15 kHz1.8 1.9ohm
The minimum value in band from 40 Hz - 15 kHz1.8 1.9ohm
The maximum value in band from 40 Hz - 15 kHz1.8 1.9ohm


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 Cowon D2 Plus (as headphone amplifier)

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Channel

Range

Load

Channel:LeftRight
Crosstalk @ 1 kHz @ 15.8 ohm -45.8 -41.8dB
Crosstalk @ 1 kHz @ 24.5 ohm -48.4 -44.8dB
Crosstalk @ 1 kHz @ 30.5 ohm -50.4 -46.8dB
Crosstalk @ 1 kHz @ 62.4 ohm -58.1 -53.1dB
Crosstalk @ 1 kHz @ 100.0 ohm -61.6 -57.2dB
Crosstalk @ 1 kHz @ 198.9 ohm -65.8 -63.5dB
Crosstalk @ 1 kHz @ 300.0 ohm -69.2 -64.6dB
Crosstalk @ 1 kHz @ 763.0 ohm -77.9 -71.6dB
Crosstalk @ 1 kHz @ Not loaded-76.4 -72.1dB


Brief information

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



Crosstalk Phase Cowon D2 Plus (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 Cowon D2 Plus with resistive load

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Channel

Range

Frequency response of amplifier with resistive load @ 40 Hz - 15 kHz
Channel:LeftRight
HP 16 Ω + Cowon D2 Plus 3.63.6dB
HP 32 Ω + Cowon D2 Plus 2.12.0dB
HP 64 Ω + Cowon D2 Plus 1.11.1dB
HP 126 Ω + Cowon D2 Plus 0.60.6dB
HP 256 Ω + Cowon D2 Plus 0.30.3dB
HP 512 Ω + Cowon D2 Plus 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 Cowon D2 Plus loaded dynamic headphone type

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Channel

Range

Frequency response of amplifier loaded dynamic headphone type @ 40 Hz - 15 kHz
Channel:LeftRight
HP 10000 Ω + Cowon D2 Plus 0.00.0dB
Grado GH4 Limited Edition + Cowon D2 Plus 1.11.2dB


Brief information

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



Frequency response Cowon D2 Plus 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 + Cowon D2 Plus 0.00.0dB
Campfire Audio Andromeda + Cowon D2 Plus 10.910.7dB
Fearless Audio S8F Freedom + Cowon D2 Plus 7.47.3dB


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 Cowon D2 Plus

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Channel

Load

Harmonic, number

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Channel

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 Cowon D2 Plus

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Type of chart

RAW coordinates

Power characteristics of the Voltage Current
dBVVRMSdB(mA)mA
Equivalent class A -3.10.7-17.70.1
Equivalent class AB -1.10.9-5.10.6
Equivalent class B -1.10.93.51.5
Maximum mode -1.10.930.934.9


Volume Control TypeDigital
Optimal range of volume control36.0dB
Signal/Noise / Maximum106.0/-1.1dB/dBV
Signal/Noise @ -14.9 dBV 32 ohm (1 mW)92.47dB
Signal/Noise @ -5.2 dBV 300 ohm (1 mW)101.92dB


Comparison Cowon D2 Plus and another amplifiers by loudness (Volume Level)

Main characteristics of the Cowon D2 Plus

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 Cowon D2 Plus

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