Measurement's report Apple A2155 USB-C to 3.5 mm Headphone Jack Adapter Neutron 44 - Reference Audio Analyzer

Apple A2155 USB-C to 3.5 mm Headphone Jack Adapter

Neutron 44
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 Apple A2155 USB-C to 3.5 mm Headphone Jack Adapter Neutron 44

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 Apple A2155 USB-C to 3.5 mm Headphone Jack Adapter (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 kHz0.3ohm
Voltage:
Linear Mode / Maximum or before clipping level
-5.7/-6.7dBV
0.5/0.5VRMS
Current:
Linear Mode / Maximum or before clipping level
20.8/30.1dB(mA)
10.9/32.1mA





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Frequency response Apple A2155 USB-C to 3.5 mm Headphone Jack Adapter Neutron 44 (as headphone amplifier)

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Channel

Range

Channel:LeftRight
Variation in frequency response in band from 40 Hz - 15 kHz -0.1, +0.0-0.1, +0.0dB



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



Impedance Apple A2155 USB-C to 3.5 mm Headphone Jack Adapter Neutron 44 (as headphone amplifier)

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Channel:LeftRight
Impedance average in band from 40 Hz - 15 kHz0.4 0.3ohm
The minimum value in band from 40 Hz - 15 kHz0.4 0.3ohm
The maximum value in band from 40 Hz - 15 kHz0.4 0.3ohm


Comparison of basic characteristics AMPs


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Crosstalk Apple A2155 USB-C to 3.5 mm Headphone Jack Adapter Neutron 44 (as headphone amplifier)

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Channel

Range

Load

Channel:LeftRight
Crosstalk @ 1 kHz @ 15.8 ohm -60.6 -57.3dB
Crosstalk @ 1 kHz @ 24.5 ohm -64.4 -61.0dB
Crosstalk @ 1 kHz @ 30.5 ohm -66.6 -63.2dB
Crosstalk @ 1 kHz @ 62.4 ohm -73.8 -70.2dB
Crosstalk @ 1 kHz @ 100.0 ohm -79.4 -75.1dB
Crosstalk @ 1 kHz @ 198.9 ohm -90.3 -83.8dB
Crosstalk @ 1 kHz @ 300.0 ohm -110.2 -91.5dB
Crosstalk @ 1 kHz @ 763.0 ohm -91.4 -95.0dB
Crosstalk @ 1 kHz @ Not loaded-86.1 -86.2dB



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Crosstalk Phase Apple A2155 USB-C to 3.5 mm Headphone Jack Adapter Neutron 44 (as headphone amplifier)

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Channel

Load




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Frequency response Apple A2155 USB-C to 3.5 mm Headphone Jack Adapter Neutron 44 with resistive load

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Channel

Range

Frequency response of amplifier with resistive load @ 40 Hz - 15 kHz
Channel:LeftRight
TEST 16 ? + Apple A2155 USB-C to 3.5 mm Headphone Jack Adapter Neutron 44 0.00.0dB
TEST 32 ? + Apple A2155 USB-C to 3.5 mm Headphone Jack Adapter Neutron 44 0.00.0dB
TEST 64 ? + Apple A2155 USB-C to 3.5 mm Headphone Jack Adapter Neutron 44 0.00.0dB
TEST 126 ? + Apple A2155 USB-C to 3.5 mm Headphone Jack Adapter Neutron 44 0.00.0dB
TEST 256 ? + Apple A2155 USB-C to 3.5 mm Headphone Jack Adapter Neutron 44 0.00.0dB
TEST 512 ? + Apple A2155 USB-C to 3.5 mm Headphone Jack Adapter Neutron 44 0.00.0dB



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 Apple A2155 USB-C to 3.5 mm Headphone Jack Adapter Neutron 44 loaded dynamic headphone type

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Channel

Range

Frequency response of amplifier loaded dynamic headphone type @ 40 Hz - 15 kHz
Channel:LeftRight
TEST 10000 ? + Apple A2155 USB-C to 3.5 mm Headphone Jack Adapter Neutron 44 0.00.0dB
Grado GH4 Limited Edition + Apple A2155 USB-C to 3.5 mm Headphone Jack Adapter Neutron 44 0.10.0dB



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 Apple A2155 USB-C to 3.5 mm Headphone Jack Adapter Neutron 44 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
TEST 10000 ? + Apple A2155 USB-C to 3.5 mm Headphone Jack Adapter Neutron 44 0.00.0dB
Campfire Audio Andromeda + Apple A2155 USB-C to 3.5 mm Headphone Jack Adapter Neutron 44 0.70.5dB
Fearless Audio S8F Freedom + Apple A2155 USB-C to 3.5 mm Headphone Jack Adapter Neutron 44 0.60.4dB



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 Apple A2155 USB-C to 3.5 mm Headphone Jack Adapter Neutron 44

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Channel

Load

Harmonic, number

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Load

Harmonic, number

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Channel

Load


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Maximum voltage output level vs load Apple A2155 USB-C to 3.5 mm Headphone Jack Adapter Neutron 44

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RAW coordinates

Power characteristics of the Voltage Current
dBVVRMSdB(mA)mA
Equivalent class A -5.70.520.810.9
Equivalent class AB -6.70.530.132.1
Equivalent class B -6.70.530.132.1
Maximum mode -6.70.530.132.1


Volume Control TypeDigital
Optimal range of volume control36.0dB
Signal/Noise / Maximum106.0/-6.7dB/dBV
Signal/Noise @ -14.9 dBV 32 ohm (1 mW)97.84dB
Signal/Noise @ -5.2 dBV 300 ohm (1 mW)LowdB


Comparison Apple A2155 USB-C to 3.5 mm Headphone Jack Adapter Neutron 44 and another amplifiers by loudness (Volume Level)

Main characteristics of the Apple A2155 USB-C to 3.5 mm Headphone Jack Adapter Neutron 44


Brief information

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Maximum voltage output level vs load Apple A2155 USB-C to 3.5 mm Headphone Jack Adapter Neutron 44

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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 -14.80.2-5.90.2-5.90.2-5.90.2
24.5 ohm -10.80.3-5.80.3-5.80.3-5.80.3
30.5 ohm -10.70.3-5.80.3-5.80.3-5.80.3
62.4 ohm -7.70.4-5.70.4-5.70.4-5.70.4
100 ohm -6.70.5-5.70.5-5.70.5-5.70.5
198.9 ohm -6.70.5-5.70.5-5.70.5-5.70.5
300 ohm -5.70.5-5.70.5-5.70.5-5.70.5
763 ohm -5.70.5-5.70.5-5.70.5-5.70.5
Not loaded-5.70.5-6.70.5-6.70.5-6.70.5



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 21.211.530.132.130.132.130.132.1
24.5 ohm 21.411.826.420.926.420.926.420.9
30.5 ohm 19.69.524.516.824.516.824.516.8
62.4 ohm 16.46.618.48.318.48.318.48.3
100 ohm 13.34.614.35.214.35.214.35.2
198.9 ohm 7.32.38.32.68.32.68.32.6
300 ohm 4.81.74.81.74.81.74.81.7
763 ohm -3.40.7-3.40.7-3.40.7-3.40.7


Power
Load Pure or equal class AOptimal or equal class ABHard or equal class BMax, before clipping
dBmmWdBmmWdBmmWdBmmW
15.8 ohm 3.22.112.116.312.116.312.116.3
24.5 ohm 5.33.410.310.710.310.710.310.7
30.5 ohm 4.42.89.48.69.48.69.48.6
62.4 ohm 4.32.76.34.36.34.36.34.3
100 ohm 3.32.14.32.74.32.74.32.7
198.9 ohm 0.31.11.31.41.31.41.31.4
300 ohm -0.50.9-0.50.9-0.50.9-0.50.9
763 ohm -4.50.4-4.50.4-4.50.4-4.50.4



Brief information

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Spectrum of Total Harmonic Distortion vs Level Apple A2155 USB-C to 3.5 mm Headphone Jack Adapter Neutron 44 (as headphone amplifier)

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Channel

Level

Range

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Channel

Level

Range

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Shift

dBm

Range

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dBV

Range




Brief information

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Spectrum of Multitone Distortion vs Level vs Load Apple A2155 USB-C to 3.5 mm Headphone Jack Adapter Neutron 44 (as headphone amplifier)

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Channel

Level

Range

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Level

Range

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dBm

Range

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dBV

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Brief information

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



   

Spectrum of IMD SMPTE vs Level Apple A2155 USB-C to 3.5 mm Headphone Jack Adapter Neutron 44 (as headphone amplifier)

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Channel

Level

Range

Range

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Channel

Level

Range

Range

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Shift

Range

dBm

Range

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Shift

Range

dBV

Range


Brief information

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Spectrum of IMD CCIF vs Level Apple A2155 USB-C to 3.5 mm Headphone Jack Adapter Neutron 44 (as headphone amplifier)

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Channel

Level

Range

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Channel

Level

Range

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Shift

dBm

Range

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dBV

Range


Brief information

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





More detailed

Measurements of Apple A2155 USB-C to 3.5 mm Headphone Jack Adapter Neutron 44 were carried out by Roman Kuznetsov on the hardware-software complex RAA.

The Apple A2155 USB-C to 3.5 mm Headphone Jack Adapter Neutron 44 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



Information for Authors. You can freely use the graphics in your articles with a link to us.












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Comments

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romanrex
Изображения, медиа и смайлы доступны в исходном чате.
2019-10-17 13:42:25

Комментарий к профессиональному отчету Apple A2155 USB-C to 3.5 mm Headphone Jack Adapter Neutron 44
Этот "переходник" предназначен для НЕApple мобильников (т.е. конкурентов) и возможно по этой причине он специально в два раза тише по громкости. Хочешь от Apple громкий звук - покупай iPhone и A1749 Lightning Audio Adapter.
Reply


Justaway
Изображения, медиа и смайлы доступны в исходном чате.
2020-07-11 02:53:04



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