Measurement's report xDuoo X2 - Reference Audio Analyzer

Reports / xDuoo / X2 / A set of device tests as a headphone amplifier - report for a pro

Test report xDuoo X2 (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 xDuoo X2

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 xDuoo X2 (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 kHz9.0ohm
Voltage:
Pure or equal class A / Maximum or before clipping level
-5.6/0.5dBV
0.5/1.1VRMS
Current:
Pure or equal class A / Maximum or before clipping level
23.1/36.2dB(mA)
14.3/64.8mA






Frequency response xDuoo X2 (as headphone amplifier)

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Channel

Range

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


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



Impedance xDuoo X2 (as headphone amplifier)

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Channel

Channel:LeftRight
Impedance average in band from 40 Hz - 15 kHz12.8 5.2ohm
The minimum value in band from 40 Hz - 15 kHz12.8 5.2ohm
The maximum value in band from 40 Hz - 15 kHz12.8 5.2ohm


Comparison of basic characteristics AMPs

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



Frequency response xDuoo X2 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 + xDuoo X2 0.00.1dB
HP 32 Ω + xDuoo X2 0.00.0dB
HP 64 Ω + xDuoo X2 0.00.0dB
HP 126 Ω + xDuoo X2 0.00.0dB
HP 256 Ω + xDuoo X2 0.00.0dB
HP 512 Ω + xDuoo X2 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 xDuoo X2 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 + xDuoo X2 0.00.0dB
Grado GH4 Limited Edition + xDuoo X2 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 xDuoo X2 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 + xDuoo X2 0.00.0dB
Campfire Audio Andromeda + xDuoo X2 0.40.6dB
Fearless Audio S8F Freedom + xDuoo X2 0.30.4dB


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 xDuoo X2

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Channel

Load

Harmonic, number

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Channel

Load

Harmonic, number

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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 xDuoo X2

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RAW coordinates

Power characteristics of the Voltage Current
dBVVRMSdB(mA)mA
Equivalent class A -5.60.523.114.3
Equivalent class AB -2.50.727.223.0
Equivalent class B 0.51.136.264.8
Maximum mode 0.51.136.264.8


Volume Control TypeDigital
Optimal range of volume control36.0dB
Signal/Noise / Maximum106.0/0.5dB/dBV
Signal/Noise @ -14.9 dBV 32 ohm (1 mW)92.76dB
Signal/Noise @ -5.2 dBV 300 ohm (1 mW)100.57dB


Comparison xDuoo X2 and another amplifiers by loudness (Volume Level)

Main characteristics of the xDuoo X2

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 xDuoo X2

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Maximum Amplifier Voltage Level
Load Pure or equal class AOptimal or equal class ABHard or equal class BMax, before clipping
dBVVRMSdBVVRMSdBVVRMSdBVVRMS
15.8 ohm -11.80.3-8.80.30.20.30.00.3
24.5 ohm -8.70.4-4.70.40.30.40.00.4
30.5 ohm -8.70.4-4.70.40.30.40.00.4
62.4 ohm -5.60.5-4.60.50.40.50.00.5
100 ohm -5.60.5-4.60.50.40.50.00.5
198.9 ohm -5.60.5-3.60.50.40.50.00.5
300 ohm -4.60.6-4.60.60.40.60.00.6
763 ohm -4.50.6-3.50.60.50.60.00.6
Not loaded-5.50.5-2.50.50.50.50.00.5



Maximum level of amplifier current
Load Pure or equal class AOptimal or equal class ABHard or equal class BMax, before clipping
dB(mA)mAdB(mA)mAdB(mA)mAdB(mA)mA
15.8 ohm 24.216.327.223.036.264.836.063.3
24.5 ohm 23.515.027.523.832.542.332.240.8
30.5 ohm 21.712.125.719.230.734.130.332.8
62.4 ohm 18.58.419.59.524.516.824.116.0
100 ohm 14.45.315.45.920.410.520.010.0
198.9 ohm 8.52.710.53.314.55.314.05.0
300 ohm 5.92.05.92.010.93.510.53.3
763 ohm -2.20.8-1.20.92.81.42.31.3


Power
Load Pure or equal class AOptimal or equal class ABHard or equal class BMax, before clipping
dBmmWdBmmWdBmmWdBmmW
15.8 ohm 6.24.29.28.318.266.318.063.3
24.5 ohm 7.45.511.413.916.443.816.140.8
30.5 ohm 6.54.510.511.215.535.515.232.8
62.4 ohm 6.54.47.55.612.517.612.016.0
100 ohm 4.42.85.43.510.411.010.010.0
198.9 ohm 1.51.43.52.27.55.67.05.0
300 ohm 0.71.20.71.25.73.75.23.3
763 ohm -3.40.5-2.40.61.61.51.21.3



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

Brief information


   

Spectrum of Total Harmonic Distortion vs Level xDuoo X2 (as headphone amplifier)

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