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 X20 Balance
One device can have multiple reports in different modes and with different a suite of tests.
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 of xDuoo X20 Balance as AMP mode
The maximum level of voltage from the musical power
General results
General results
xDuoo X20 Balance
xDuoo X20 Balance
Channel
Center/Summary
Average variation in FR in the band 40 Hz to 15 kHz, dB
-0,06, 0,03
Average value of impedance band in 40 Hz to 15 kHz, ohm
1,0
Max voltage output
VRMS
dBV
Maximum current output at loaded
ohm
mA
Max power output
ohm
mW
dBm
The table shows a most important technical characteristics of xDuoo X20 Balance
*Center channel is received by data averaging between the left and right channels
Test conditions
- For record of test signals RAA was used ADC: E-MU 1616m
- The difference between maximum levels output unloaded xDuoo X20 Balance and input level 0 dBFS E-MU1616m is -7,76 dB (value level for left and right channels)
- The signal was played to the amplifier with DAC: Internal DAC
- The signal was tested with output: Jack
- Was exposed to the level of the signal: Maximum level
- The bit size/format of the test signal: PCM 24 bit
- The source of the test signal: Internal software player
- During tests RAA software-hardware measuring complex was used galvanic isolated power transformer and was excluded the effect of ground loop in the spectra
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Detailed measurements report of technical characteristics
Report content
- Frequency response
- Frequency response with loaded resistors
- | Variation in frequency response dependence of load dynamic type headphones
- Frequency response vs load balance armature headphone type (one driver) | Variation in frequency response vs load balance armature headphone type (one driver)
- Crosstalk
- Impedance
- Maximum level:
- voltage from the musical power for the amplifier output
- voltage output level vs load of sine
- current output level vs load of sine
- power output level vs load of sine
- THD vs load vs output voltage
Spectra vs Amplitude
- Harmonic distortion spectrum vs amplitude vs loaded
- Not loaded
- Loaded 15,8 ohm
- Loaded 24,5 ohm
- Loaded 30,5 ohm
- Loaded 62,4 ohm
- Loaded 100 ohm
- Loaded 198,9 ohm
- Loaded 300 ohm
- Loaded 763 ohm
- Spectrum of IMD SMPTE vs Level
- Not loaded
- Loaded 15,8 ohm
- Loaded 24,5 ohm
- Loaded 30,5 ohm
- Loaded 62,4 ohm
- Loaded 100 ohm
- Loaded 198,9 ohm
- Loaded 300 ohm
- Loaded 763 ohm
- Spectrum of IMD CCIF vs Level
- Not loaded
- Loaded 15,8 ohm
- Loaded 24,5 ohm
- Loaded 30,5 ohm
- Loaded 62,4 ohm
- Loaded 100 ohm
- Loaded 198,9 ohm
- Loaded 300 ohm
- Loaded 763 ohm
- Spectrum of Multitone Distortion vs Level vs Load
Graphics setting view
Range, dB:
Channel:
Table
Frequency response xDuoo X20 Balance
Channel
Left
Right
Variation in frequency response in band from 100 Hz to 10 kHz, dB
-0,06, 0,03
-0,06, 0,03
Graphics setting view
Channel:
Table
Impedance xDuoo X20 Balance
Channel
Left
Right
Impedance average in band from 40 Hz to 15 kHz, ohm
1,0
1,1
Resistance at 500 Hz, ohm
1,0
1,1
Resistance at 1000 Hz, ohm
1,0
1,1
The minimum value in band from 40 Hz to 15 kHz at frequency, Hz
5940,0
5940,0
The minimum value in band from 40 Hz to 15 kHz, ohm
1,0
1,1
The maximum value in band from 40 Hz to 15 kHz at frequency, Hz
7910,5
7910,5
The maximum value in band from 40 Hz to 15 kHz, ohm
1,0
1,1
Comparison of the parameters by on-line services
Comparison of basic characteristics the
Impedance. Voltage, Current and Impedance
Graphics setting view
Range, dB:
Channel:
Load, ohm:
Table
Graphics setting view
Range, dB:
Channel:
Table
Frequency response of amplifier headphone amplifier xDuoo X20 Balance
with resistive load
with resistive load
Channel
Center/Summary
Variation in frequency response in band 40 Hz to 15 kHz loaded 16 ohm, dB
0,01
Variation in frequency response in band 40 Hz to 15 kHz loaded 32 ohm, dB
0,00
Variation in frequency response in band 40 Hz to 15 kHz loaded 50 ohm, dB
0,00
Variation in frequency response in band 40 Hz to 15 kHz loaded 100 ohm, dB
0,00
Variation in frequency response in band 40 Hz to 15 kHz loaded 250 ohm, dB
0,00
Variation in frequency response in band 40 Hz to 15 kHz loaded 600 ohm, dB
0,00
*Center channel is received by data averaging between the left and right channels
Comparison of the parameters by on-line services
Compare the frequency response of a bundle of headphones and amplifiers
How the frequency response of xDuoo X20 Balance changes when connected to different headphones? In the example the xDuoo X20 Balance and headphones Sennheiser CX 5.00, Sunrise Dragon Default, Audio-Technica ATH-E40, Apple EarPods, Enigma Acoustics & Lotoo Dharma D200 ). You can choose and compare bundles with other headphones .
Graphics setting view
Range, dB:
Channel:
Table
Frequency response of the headphone amplifier xDuoo X20 Balance
loaded dynamic headphone type
loaded dynamic headphone type
Channel
Center/Summary
Variation in frequency response in band 40 Hz to 15 kHz load the dynamic type, dB
0,18
*Center channel is received by data averaging between the left and right channels
Comparison of the parameters by on-line services
Compare the frequency response of a bundle of headphones and amplifiers
How the frequency response of xDuoo X20 Balance changes when connected to different headphones? In the example the xDuoo X20 Balance and headphones Grado eGrado, VE Monk Plus, Jays v-Jays Small ). You can choose and compare bundles with other headphones .
Graphics setting view
Range, dB:
Channel:
Table
Frequency response of amplifier xDuoo X20 Balance
loaded dynamic headphone type
loaded dynamic headphone type
Channel
Center/Summary
Variation in frequency response in band 40 Hz to 15 kHz load the dynamic type, dB
0,11
*Center channel is received by data averaging between the left and right channels
Comparison of the parameters by on-line services
Compare the frequency response of a bundle of headphones and amplifiers
How the frequency response of xDuoo X20 Balance changes when connected to different headphones? In the example the xDuoo X20 Balance and headphones Grado eGrado, VE Monk Plus, Jays v-Jays Small ). You can choose and compare bundles with other headphones .
Frequency response of xDuoo X20 Balance loaded type balance armature headphone type (one driver) as AMP mode
Graphics setting view
Range, dB:
Channel:
Table
Frequency response of amplifier xDuoo X20 Balance
loaded type balanced armature
loaded type balanced armature
Channel
Center/Summary
Variation in frequency response in band 40 Hz to 15 kHz loaded type balanced armature, dB
0,45
*Center channel is received by data averaging between the left and right channels
Comparison of the parameters by on-line services
Compare the frequency response of a bundle of headphones and amplifiers
How the frequency response of xDuoo X20 Balance changes when connected to different headphones? In the example the xDuoo X20 Balance and headphones Sony XBA-Z5, Creative In-Ear 3, Phiaton PS 320, Dunu DN-2002, iBasso IT03, Dunu DN 900, Oriolus Mellianus ). You can choose and compare bundles with other headphones .
Deviation of frequency response of xDuoo X20 Balance loaded type balance armature headphone type (one driver) as AMP mode
Graphics setting view
Range, dB:
Channel:
Table
Frequency response of amplifier xDuoo X20 Balance
loaded type balanced armature
loaded type balanced armature
Channel
Center/Summary
Variation in frequency response in band 40 Hz to 15 kHz loaded type balanced armature, dB
0,48
*Center channel is received by data averaging between the left and right channels
Comparison of the parameters by on-line services
Compare the frequency response of a bundle of headphones and amplifiers
How the frequency response of xDuoo X20 Balance changes when connected to different headphones? In the example the xDuoo X20 Balance and headphones Sony XBA-Z5, Creative In-Ear 3, Phiaton PS 320, Dunu DN-2002, iBasso IT03, Dunu DN 900, Oriolus Mellianus ). You can choose and compare bundles with other headphones .
