Test report - general data of xDuoo D3 nano as AMP mode
The maximum level of voltage from the musical power
General results
General results
xDuoo D3 nano
xDuoo D3 nano
Channel
Center/Summary
Average variation in FR in the band 40 Hz to 15 kHz, dB
-0,05, 0,02
Average value of impedance band in 40 Hz to 15 kHz, ohm
0,1
Max voltage output
VRMS
dBV
Pure or equal class A
1,42
3,03
Optimal or equal class AB
1,42
3,03
Hard or equal class B
1,42
3,03
Max, before clipping
1,42
3,03
Maximum current output at loaded
ohm
mA
Pure or equal class A
24,5
5,12
Optimal or equal class AB
15,8
79,17
Hard or equal class B
15,8
79,17
Max, before clipping
15,8
79,17
Max power output
ohm
mW
dBm
Pure or equal class A
300,0
2,66
4,25
Optimal or equal class AB
15,8
99,03
19,96
Hard or equal class B
15,8
99,03
19,96
Max, before clipping
15,8
99,03
19,96
The table shows a most important technical characteristics of xDuoo D3 nano
*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 D3 nano and input level 0 dBFS E-MU1616m is -15,03 dB (value level for left and right channels)
- The signal was played to the amplifier with DAC: Internal DAC
- 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
Detailed measurements report of technical characteristics
Report content
- Frequency response
- Frequency response with loaded resistors
- Frequency response vs load dynamic type headphones | 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 of measured characteristics
Frequency response xDuoo D3 nano
Channel
Left
Right
Variation in frequency response in band from 100 Hz to 10 kHz, dB
-0,05, 0,02
-0,05, 0,02
Graphics setting view
Channel:
Table of measured characteristics
Impedance xDuoo D3 nano
Channel
Left
Right
Impedance average in band from 40 Hz to 15 kHz, ohm
0,1
0,1
Resistance at 500 Hz, ohm
0,1
0,1
Resistance at 1000 Hz, ohm
0,1
0,1
The minimum value in band from 40 Hz to 15 kHz at frequency, Hz
9128,7
9128,7
The minimum value in band from 40 Hz to 15 kHz, ohm
0,1
0,1
The maximum value in band from 40 Hz to 15 kHz at frequency, Hz
14028,9
14028,9
The maximum value in band from 40 Hz to 15 kHz, ohm
0,1
0,1
Graphics setting view
Range, dB:
Channel:
Load, ohm:
Table of measured characteristics
Graphics setting view
Channel:
Load, ohm:
Graphics setting view
Range, dB:
Channel:
Table of measured characteristics
Frequency response of amplifier headphone amplifier xDuoo D3 nano
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
Graphics setting view
Range, dB:
Channel:
Table of measured characteristics
Frequency response of the headphone amplifier xDuoo D3 nano
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
0,09
*Center channel is received by data averaging between the left and right channels
Graphics setting view
Range, dB:
Channel:
Table of measured characteristics
Frequency response of amplifier xDuoo D3 nano
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
0,01
*Center channel is received by data averaging between the left and right channels
Frequency response of xDuoo D3 nano loaded type balance armature headphone type (one driver) as AMP mode
Graphics setting view
Range, dB:
Channel:
Table of measured characteristics
Frequency response of amplifier xDuoo D3 nano
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
0,09
*Center channel is received by data averaging between the left and right channels
Deviation of frequency response of xDuoo D3 nano loaded type balance armature headphone type (one driver) as AMP mode
Graphics setting view
Range, dB:
Channel:
Table of measured characteristics
Frequency response of amplifier xDuoo D3 nano
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
0,06
*Center channel is received by data averaging between the left and right channels
Graphics setting view
Channel:
Table of measured characteristics
Maximum voltage output level vs load xDuoo D3 nano (the source data for the spectra)
Limit
Pure or equal class A
Optimal or equal class AB
Hard or equal class B
Max, before clipping
Level
VRMS
dBV
VRMS
dBV
VRMS
dBV
VRMS
dBV
loaded 16 ohm
0,08
-22,05
1,25
1,94
1,25
1,94
1,25
1,94
loaded 25 ohm
0,13
-18,02
1,26
1,97
1,26
1,97
1,26
1,97
loaded 31 ohm
0,13
-18,01
1,26
1,99
1,26
1,99
1,26
1,99
loaded 62 ohm
0,25
-11,99
1,41
3,01
1,41
3,01
1,41
3,01
loaded 100 ohm
0,36
-8,98
1,26
2,02
1,26
2,02
1,26
2,02
loaded 199 ohm
0,50
-5,98
1,42
3,02
1,42
3,02
1,42
3,02
loaded 300 ohm
0,89
-0,98
1,42
3,02
1,42
3,02
1,42
3,02
loaded 763 ohm
1,26
2,03
1,42
3,03
1,42
3,03
1,42
3,03
Not loaded
1,42
3,03
1,42
3,03
1,42
3,03
1,42
3,03
Table of measured characteristics
Recommended impedances for headphones for xDuoo D3 nano
Recommended impedance for headphones from the range
8 - 1008 Ом для режима работы усилителя
8 - 1008 Ом для режима работы усилителя
Equivalent class A
Max, before clipping
For In-Ear Headphones
103 - 819 ohm
8 - 819 ohm
For Over-Ear Headphones
No recommendation, Amp is too quiet
8 - 41 ohm
Table of measured characteristics
xDuoo D3 nano
Output Impedance
0.12 ohm
Power characteristics of the
Voltage
Current
Equivalent class A
1.42 VRMS
3.03 dBV
3.03 dBV
4.33 mA
12.74 dB(mA)
12.74 dB(mA)
Equivalent class AB
1.42 VRMS
3.03 dBV
3.03 dBV
79.36 mA
37.99 dB(mA)
37.99 dB(mA)
Equivalent class B
1.42 VRMS
3.03 dBV
3.03 dBV
79.36 mA
37.99 dB(mA)
37.99 dB(mA)
Maximum mode
1.42 VRMS
3.03 dBV
3.03 dBV
79.36 mA
37.99 dB(mA)
37.99 dB(mA)
Graphics setting view
Channel:
Table of measured characteristics
Maximum current level output vs load xDuoo D3 nano (the source data for the spectra)
Level, mA
Pure or equal class A
Optimal or equal class AB
Hard or equal class B
Max, before clipping
Level
mA
dB(mA)
mA
dB(mA)
mA
dB(mA)
mA
dB(mA)
loaded 16 ohm
5,00
13,98
79,17
37,97
79,17
37,97
79,17
37,97
loaded 25 ohm
5,12
14,19
51,23
34,19
51,23
34,19
51,23
34,19
loaded 31 ohm
4,12
12,30
41,21
32,30
41,21
32,30
41,21
32,30
loaded 62 ohm
4,03
12,11
22,65
27,10
22,65
27,10
22,65
27,10
loaded 100 ohm
3,55
11,02
12,61
22,02
12,61
22,02
12,61
22,02
loaded 199 ohm
2,53
8,05
7,12
17,05
7,12
17,05
7,12
17,05
loaded 300 ohm
2,98
9,48
4,72
13,48
4,72
13,48
4,72
13,48
loaded 763 ohm
1,66
4,38
1,86
5,38
1,86
5,38
1,86
5,38
Not loaded
0,03
-30,95
0,03
-30,95
0,03
-30,95
0,03
-30,95
Graphics setting view
Channel:
Table of measured characteristics
Maximum power level output level vs load xDuoo D3 nano (the source data for the spectra)
Limit
Pure or equal class A
Optimal or equal class AB
Hard or equal class B
Max, before clipping
Level
mW
dBm
mW
dBm
mW
dBm
mW
dBm
loaded 16 ohm
0,39
-4,04
99,03
19,96
99,03
19,96
99,03
19,96
loaded 25 ohm
0,64
-1,92
64,31
18,08
64,31
18,08
64,31
18,08
loaded 31 ohm
0,52
-2,86
51,79
17,14
51,79
17,14
51,79
17,14
loaded 62 ohm
1,01
0,06
32,01
15,05
32,01
15,05
32,01
15,05
loaded 100 ohm
1,26
1,02
15,90
12,02
15,90
12,02
15,90
12,02
loaded 199 ohm
1,27
1,04
10,08
10,03
10,08
10,03
10,08
10,03
loaded 300 ohm
2,66
4,25
6,69
8,25
6,69
8,25
6,69
8,25
loaded 763 ohm
2,09
3,20
2,63
4,20
2,63
4,20
2,63
4,20
Not loaded
0,04
-13,96
0,04
-13,96
0,04
-13,96
0,04
-13,96
Graphics setting view
Channel:
Load, ohm:
Type test:
Table of measured characteristics
On-line comparison and selection services for xDuoo D3 nano
Comparison of basic characteristics xDuoo D3 nano versus other models.
Voltage, Current and Impedance
Voltage, Current and Impedance
Comparison of the power characteristics of xDuoo D3 nano and interaction headphones.
Additional headphone compatibility analytics.
Additional headphone compatibility analytics.
The automatic selection of the optimal AMP models from xDuoo D3 nano .
from the measured power parameters of the amplifying part and the measured parameters of the headphones for different purpose of use.
from the measured power parameters of the amplifying part and the measured parameters of the headphones for different purpose of use.
Close ⊗
Measurements of xDuoo D3 nano were carried out by Roman Kuznetsov on the hardware-software complex RAA.
The xDuoo D3 nano 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
xDuoo D3 nano is available in reports and services. You are in a professional report.
Information for entry level users
reports for a newbie (Headphone amplifier)
reports for a newbie (Headphone amplifier)
Information for all
Versus of characteristics
Versus of characteristics
Information for professionals
reports for a pro (Headphone amplifier)
(DAC Line Out)
Comparison of on-line graphs
reports for a pro (Headphone amplifier)
(DAC Line Out)
Comparison of on-line graphs
- Comparison of basic characteristics
- Comparison of the frequency response/SPL of the bundles of headphones and amplifiers
- Voltage and Sensitivity
