Measurement's report Xiaomi Redmi Note 4X Android 6 24 bit - Reference Audio Analyzer

Xiaomi Redmi Note 4X

Android 6 24 bit
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 Xiaomi Redmi Note 4X Android 6 24 bit

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 Xiaomi Redmi Note 4X (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 kHz0.8ohm
Voltage:
Linear Mode / Maximum or before clipping level
-88.9/-4.7dBV
0.0/0.6VRMS
Current:
Linear Mode / Maximum or before clipping level
-53.3/30.9dB(mA)
0.0/34.9mA





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Frequency response Xiaomi Redmi Note 4X Android 6 24 bit (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 Xiaomi Redmi Note 4X Android 6 24 bit (as headphone amplifier)

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Channel:LeftRight
Impedance average in band from 40 Hz - 15 kHz0.8 0.8ohm
The minimum value in band from 40 Hz - 15 kHz0.8 0.7ohm
The maximum value in band from 40 Hz - 15 kHz0.8 0.8ohm


Comparison of basic characteristics AMPs


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Crosstalk Xiaomi Redmi Note 4X Android 6 24 bit (as headphone amplifier)

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Channel

Range

Load

Channel:LeftRight
Crosstalk @ 1 kHz @ 15.8 ohm -51.5 -51.5dB
Crosstalk @ 1 kHz @ 24.5 ohm -55.3 -55.2dB
Crosstalk @ 1 kHz @ 30.5 ohm -57.2 -57.2dB
Crosstalk @ 1 kHz @ 62.4 ohm -64.0 -64.1dB
Crosstalk @ 1 kHz @ 100.0 ohm -68.4 -68.3dB
Crosstalk @ 1 kHz @ 198.9 ohm -75.5 -75.5dB
Crosstalk @ 1 kHz @ 300.0 ohm -80.5 -80.6dB
Crosstalk @ 1 kHz @ 763.0 ohm -99.6 -96.7dB
Crosstalk @ 1 kHz @ Not loaded-86.9 -87.0dB



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Crosstalk Phase Xiaomi Redmi Note 4X Android 6 24 bit (as headphone amplifier)

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Load




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Frequency response Xiaomi Redmi Note 4X Android 6 24 bit with resistive load

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Frequency response of amplifier with resistive load @ 40 Hz - 15 kHz
Channel:LeftRight
TEST 16 ? + Xiaomi Redmi Note 4X Android 6 24 bit 0.00.0dB
TEST 32 ? + Xiaomi Redmi Note 4X Android 6 24 bit 0.00.0dB
TEST 64 ? + Xiaomi Redmi Note 4X Android 6 24 bit 0.00.0dB
TEST 126 ? + Xiaomi Redmi Note 4X Android 6 24 bit 0.00.0dB
TEST 256 ? + Xiaomi Redmi Note 4X Android 6 24 bit 0.00.0dB
TEST 512 ? + Xiaomi Redmi Note 4X Android 6 24 bit 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 Xiaomi Redmi Note 4X Android 6 24 bit 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 ? + Xiaomi Redmi Note 4X Android 6 24 bit 0.00.0dB
Grado GH4 Limited Edition + Xiaomi Redmi Note 4X Android 6 24 bit 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 Xiaomi Redmi Note 4X Android 6 24 bit 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 ? + Xiaomi Redmi Note 4X Android 6 24 bit 0.00.0dB
Campfire Audio Andromeda + Xiaomi Redmi Note 4X Android 6 24 bit 1.41.3dB
Fearless Audio S8F Freedom + Xiaomi Redmi Note 4X Android 6 24 bit 1.11.0dB



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



THD vs load vs output voltage Xiaomi Redmi Note 4X Android 6 24 bit

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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 Xiaomi Redmi Note 4X Android 6 24 bit

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RAW coordinates

Power characteristics of the Voltage Current
dBVVRMSdB(mA)mA
Equivalent class A -88.90.0-53.30.0
Equivalent class AB -4.70.617.97.9
Equivalent class B -4.70.621.511.8
Maximum mode -4.70.630.934.9


Volume Control TypeDigital
Optimal range of volume control31.0dB
Signal/Noise / Maximum101.0/-4.7dB/dBV
Signal/Noise @ -14.9 dBV 32 ohm (1 mW)91.00dB
Signal/Noise @ -5.2 dBV 300 ohm (1 mW)100.53dB


Comparison Xiaomi Redmi Note 4X Android 6 24 bit and another amplifiers by loudness (Volume Level)

Main characteristics of the Xiaomi Redmi Note 4X Android 6 24 bit


Brief information

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Maximum voltage output level vs load Xiaomi Redmi Note 4X Android 6 24 bit

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RAW coordinates

Maximum Amplifier Voltage Level
Load Pure or equal class AOptimal or equal class ABHard or equal class BMax, before clipping
dBVVRMSdBVVRMSdBVVRMSdBVVRMS
15.8 ohm -89.30.0-17.20.0-14.20.0-5.20.0
24.5 ohm -89.10.0-14.00.0-10.00.0-5.00.0
30.5 ohm -89.10.0-14.00.0-10.00.0-5.00.0
62.4 ohm -89.00.0-5.90.0-4.90.0-4.90.0
100 ohm -88.90.0-4.80.0-4.80.0-4.80.0
198.9 ohm -88.90.0-4.80.0-4.80.0-4.80.0
300 ohm -88.90.0-4.80.0-4.80.0-4.80.0
763 ohm -88.90.0-4.80.0-4.80.0-4.80.0
Not loaded-88.90.0-4.70.0-4.70.0-4.70.0



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 -53.30.018.88.821.812.430.834.9
24.5 ohm -56.90.018.28.122.212.927.222.9
30.5 ohm -58.80.016.36.620.310.425.318.5
62.4 ohm -64.90.018.28.219.29.219.29.2
100 ohm -68.90.015.25.715.25.715.25.7
198.9 ohm -74.90.09.22.99.22.99.22.9
300 ohm -78.40.05.71.95.71.95.71.9
763 ohm -86.50.0-2.40.8-2.40.8-2.40.8


Power
Load Pure or equal class AOptimal or equal class ABHard or equal class BMax, before clipping
dBmmWdBmmWdBmmWdBmmW
15.8 ohm -71.30.00.81.23.82.412.819.2
24.5 ohm -73.00.02.11.66.14.111.112.8
30.5 ohm -73.90.01.21.35.23.310.210.4
62.4 ohm -76.90.06.24.27.25.27.25.2
100 ohm -78.90.05.23.35.23.35.23.3
198.9 ohm -81.90.02.21.72.21.72.21.7
300 ohm -83.70.00.51.10.51.10.51.1
763 ohm -87.70.0-3.60.4-3.60.4-3.60.4



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Spectrum of Total Harmonic Distortion vs Level Xiaomi Redmi Note 4X Android 6 24 bit (as headphone amplifier)

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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 Xiaomi Redmi Note 4X Android 6 24 bit (as headphone amplifier)

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Level

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dBm

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dBV

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Spectrum of IMD SMPTE vs Level Xiaomi Redmi Note 4X Android 6 24 bit (as headphone amplifier)

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Level

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Level

Range

Range

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Range

dBm

Range

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dBV

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Spectrum of IMD CCIF vs Level Xiaomi Redmi Note 4X Android 6 24 bit (as headphone amplifier)

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Level

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Level

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dBm

Range

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dBV

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More detailed

Measurements of Xiaomi Redmi Note 4X Android 6 24 bit were carried out by Roman Kuznetsov on the hardware-software complex RAA.

The Xiaomi Redmi Note 4X Android 6 24 bit 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.




Xiaomi Redmi Note 4X is available in reports and services. You are in a professional report.

Information for entry level users

    reports for a newbie (Headphone amplifier)
    The automatic selection of the optimal AMP models









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