Measurement's report iBasso D-Zero - Reference Audio Analyzer

iBasso D-Zero

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 iBasso D-Zero

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".

Line-out, differences from the output for headphones and speakers

Advantages and disadvantages of balanced amplifiers

Test report - general data iBasso D-Zero (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 kHz0.6ohm
Voltage:
Linear Mode / Maximum or before clipping level
-1.0/0.1dBV
0.9/1.0VRMS
Current:
Linear Mode / Maximum or before clipping level
3.1/15.9dB(mA)
1.4/6.2mA





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Frequency response iBasso D-Zero (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



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On the frequency response comparison page, there is an export option and additional tools for adjusting the frequency response



Impedance iBasso D-Zero (as headphone amplifier)

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Channel:LeftRight
Impedance average in band from 40 Hz - 15 kHz0.6 0.6ohm
The minimum value in band from 40 Hz - 15 kHz0.3 0.3ohm
The maximum value in band from 40 Hz - 15 kHz2.8 2.8ohm


Comparison of basic characteristics AMPs


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Crosstalk iBasso D-Zero (as headphone amplifier)

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Channel

Range

Load

Channel:LeftRight
Crosstalk @ 1 kHz @ 15.8 ohm -58.5 -57.9dB
Crosstalk @ 1 kHz @ 24.5 ohm -62.3 -61.6dB
Crosstalk @ 1 kHz @ 30.5 ohm -67.3 -66.3dB
Crosstalk @ 1 kHz @ 62.4 ohm -70.8 -70.1dB
Crosstalk @ 1 kHz @ 100.0 ohm -74.9 -72.9dB
Crosstalk @ 1 kHz @ 198.9 ohm -81.0 -77.6dB
Crosstalk @ 1 kHz @ 300.0 ohm -85.1 -81.7dB
Crosstalk @ 1 kHz @ 763.0 ohm -93.6 -85.7dB
Crosstalk @ 1 kHz @ Not loaded-105.8 -86.5dB



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Frequency response iBasso D-Zero with resistive load

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Frequency response of amplifier with resistive load @ 40 Hz - 15 kHz
Channel:LeftRight
TEST 16 ? + iBasso D-Zero 1.51.5dB
TEST 32 ? + iBasso D-Zero 0.80.8dB
TEST 64 ? + iBasso D-Zero 0.40.4dB
TEST 126 ? + iBasso D-Zero 0.20.2dB
TEST 256 ? + iBasso D-Zero 0.10.1dB
TEST 512 ? + iBasso D-Zero 0.10.1dB



Brief information

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

On the frequency response comparison page, there is an export option and additional tools for adjusting the frequency response



Frequency response iBasso D-Zero loaded dynamic headphone type

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Range

Frequency response of amplifier loaded dynamic headphone type @ 40 Hz - 15 kHz
Channel:LeftRight
TEST 10000 ? + iBasso D-Zero 0.00.0dB
Grado GH4 Limited Edition + iBasso D-Zero 0.40.5dB



Brief information

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On the frequency response comparison page, there is an export option and additional tools for adjusting the frequency response



Frequency response iBasso D-Zero loaded type balance armature headphone type

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Range

Frequency response of amplifier loaded type balance armature headphone type @ 40 Hz - 15 kHz
Channel:LeftRight
TEST 10000 ? + iBasso D-Zero 0.00.0dB
Campfire Audio Andromeda + iBasso D-Zero 5.65.5dB
Fearless Audio S8F Freedom + iBasso D-Zero 3.53.5dB



Brief information

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

On the frequency response comparison page, there is an export option and additional tools for adjusting the frequency response



THD vs load vs output voltage iBasso D-Zero

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Channel

Load

Harmonic, number

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Load

Harmonic, number

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Load


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Maximum voltage output level vs load iBasso D-Zero

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RAW coordinates

Power characteristics of the Voltage Current
dBVVRMSdB(mA)mA
Equivalent class A -1.00.93.11.4
Equivalent class AB 0.11.010.13.2
Equivalent class B 0.11.015.35.8
Maximum mode 0.11.015.96.2


Volume Control TypeAnalog
Optimal range of volume control36.0dB


Comparison iBasso D-Zero and another amplifiers by loudness (Volume Level)

Main characteristics of the iBasso D-Zero


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Maximum voltage output level vs load iBasso D-Zero

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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 -30.20.0-25.20.0-21.20.0-21.20.0
24.5 ohm -30.10.0-21.10.0-18.10.0-15.10.0
30.5 ohm -28.10.0-19.10.0-14.10.0-14.10.0
62.4 ohm -21.00.1-15.00.1-9.00.1-9.00.1
100 ohm -15.00.2-9.00.2-4.00.2-4.00.2
198.9 ohm -12.00.3-6.00.3-1.00.3-1.00.3
300 ohm -9.00.4-1.00.4-1.00.4-1.00.4
763 ohm -3.00.7-1.00.7-1.00.7-1.00.7
Not loaded-1.00.90.00.90.00.90.00.9



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 5.92.010.93.514.95.514.95.5
24.5 ohm 2.11.311.13.614.15.117.17.2
30.5 ohm 2.21.311.23.616.26.516.26.5
62.4 ohm 3.11.49.12.815.15.715.15.7
100 ohm 5.01.811.03.616.06.316.06.3
198.9 ohm 2.11.38.12.513.14.513.14.5
300 ohm 1.51.29.53.09.53.09.53.0
763 ohm -0.60.91.41.21.41.21.41.2


Power
Load Pure or equal class AOptimal or equal class ABHard or equal class BMax, before clipping
dBmmWdBmmWdBmmWdBmmW
15.8 ohm -12.10.1-7.10.2-3.10.5-3.10.5
24.5 ohm -14.00.0-5.00.3-2.00.61.01.3
30.5 ohm -13.00.1-4.00.41.01.31.01.3
62.4 ohm -9.00.1-3.00.53.02.03.02.0
100 ohm -5.00.31.01.36.04.06.04.0
198.9 ohm -5.00.31.01.36.04.06.04.0
300 ohm -3.70.44.32.74.32.74.32.7
763 ohm -1.80.70.21.10.21.10.21.1



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Spectrum of Total Harmonic Distortion vs Level iBasso D-Zero (as headphone amplifier)

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Level

Range

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Level

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dBm

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dBV

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Spectrum of Multitone Distortion vs Level vs Load iBasso D-Zero (as headphone amplifier)

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dBm

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Spectrum of IMD SMPTE vs Level iBasso D-Zero (as headphone amplifier)

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Level

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Level

Range

Range

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dBm

Range

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dBV

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Spectrum of IMD CCIF vs Level iBasso D-Zero (as headphone amplifier)

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Level

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Level

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dBm

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dBV

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Spectrum of Noise Distortion vs Level vs Load iBasso D-Zero (as headphone amplifier)

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Level

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Level

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dBm

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dBV

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More detailed

Measurements of iBasso D-Zero were carried out by Roman Kuznetsov on the hardware-software complex RAA.

The iBasso D-Zero test was conducted as a black box test, without regard to cost and prestige. This is the basic principle for making measurements, measurement reports and developing tests in RAA.

I believe that it is important to do not make an absolute assessment of the device, but an aggregate assessment when working together with a headphones and taking into account external factors. This allows you to effectively reveal the potential of the entire set of devices or to make a more optimal choice of components.




Kuznetsov Roman
Founder of RAA



Known by the nickname romanrex
Аuthor of articles iXBT.com



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