Measurement's report OPPO HA-2 test and graphs - Reference Audio Analyzer

OPPO HA-2 is available in reports and services. You are in a professional report.

Service and suite of tests

Information for entry level users

report for a newbie
(Headphone amplifier)

General recommendations

The automatic selection of the optimal AMP models

Information for all

Comparison of on-line graphs


Reports / OPPO / HA-2 / Amplifier path / report for a pro

Test report OPPO HA-2 (report for a pro)






Test report - general data of OPPO HA-2 as AMP mode

Frequency response, Impedance and Frequency response with standard headphones


Graphics setting view
Range, dB:

The maximum level of voltage from the musical power



General results
General results
OPPO HA-2
Channel
Center/Summary
Average variation in FR in the band 40 Hz to 15 kHz, dB
-0,02, 0,07
Average value of impedance band in 40 Hz to 15 kHz, ohm
1,3
Max voltage output
VRMS
dBV
Pure or equal class AF.A.Q.
2,39
7,55
Optimal or equal class ABF.A.Q.
2,68
8,55
Hard or equal class BF.A.Q.
2,68
8,55
Max, before clippingF.A.Q.
2,68
8,55
Maximum current output at loaded
ohm
mA
Pure or equal class AF.A.Q.
24,5
37,25
Optimal or equal class ABF.A.Q.
15,8
100,38
Hard or equal class BF.A.Q.
15,8
126,35
Max, before clippingF.A.Q.
15,8
126,35
Max power output
ohm
mW
dBm
Pure or equal class AF.A.Q.
62,4
55,80
17,47
Optimal or equal class ABF.A.Q.
30,5
175,18
22,43
Hard or equal class BF.A.Q.
15,8
252,23
24,02
Max, before clippingF.A.Q.
15,8
252,23
24,02

The table shows a most important technical characteristics of OPPO HA-2

*Center channel is received by data averaging between the left and right channels



Test conditions



Frequency response of OPPO HA-2 as AMP mode


Graphics setting view
Range, dB:
Channel:




Table of measured characteristics
Frequency response OPPO HA-2
Channel
Left
Right
Variation in frequency response in band from 100 Hz to 10 kHz, dB
-0,02, 0,08
-0,01, 0,05

Impedance of OPPO HA-2 as AMP mode


Graphics setting view
Channel:




Table of measured characteristics
Impedance OPPO HA-2
Channel
Left
Right
Impedance average in band from 40 Hz to 15 kHz, ohm
1,3
1,3
Resistance at 500 Hz, ohm
1,3
1,3
Resistance at 1000 Hz, ohm
1,3
1,3
The minimum value in band from 40 Hz to 15 kHz at frequency, Hz
46,9
117,2
The minimum value in band from 40 Hz to 15 kHz, ohm
1,2
1,3
The maximum value in band from 40 Hz to 15 kHz at frequency, Hz
210,9
164,1
The maximum value in band from 40 Hz to 15 kHz, ohm
1,3
1,3

Frequency response of OPPO HA-2 with loaded resistors as AMP mode


Graphics setting view
Range, dB:
Channel:




Table of measured characteristics
Frequency response of amplifier headphone amplifier OPPO HA-2
with resistive load
Channel
Center/Summary
Variation in frequency response in band 40 Hz to 15 kHz loaded 16 ohm, dB
0,02
Variation in frequency response in band 40 Hz to 15 kHz loaded 32 ohm, dB
0,01
Variation in frequency response in band 40 Hz to 15 kHz loaded 50 ohm, dB
0,01
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


Frequency response of OPPO HA-2 loaded dynamic headphone type as AMP mode


Graphics setting view
Range, dB:
Channel:




Table of measured characteristics
Frequency response of the headphone amplifier OPPO HA-2
loaded dynamic headphone type
Channel
Center/Summary
Variation in frequency response in band 40 Hz to 15 kHz load the dynamic type, dB
0,19

*Center channel is received by data averaging between the left and right channels


Deviation of frequency response of OPPO HA-2 loaded dynamic headphone type as AMP mode


Graphics setting view
Range, dB:
Channel:




Table of measured characteristics
Frequency response of amplifier OPPO HA-2
loaded dynamic headphone type
Channel
Center/Summary
Variation in frequency response in band 40 Hz to 15 kHz load the dynamic type, dB
0,14

*Center channel is received by data averaging between the left and right channels


Frequency response of OPPO HA-2 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 OPPO HA-2
loaded type balanced armature
Channel
Center/Summary
Variation in frequency response in band 40 Hz to 15 kHz loaded type balanced armature, dB
0,56

*Center channel is received by data averaging between the left and right channels


Deviation of frequency response of OPPO HA-2 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 OPPO HA-2
loaded type balanced armature
Channel
Center/Summary
Variation in frequency response in band 40 Hz to 15 kHz loaded type balanced armature, dB
0,60

*Center channel is received by data averaging between the left and right channels




Maximum voltage output level vs load of OPPO HA-2 as AMP mode


Graphics setting view
Channel:




Table of measured characteristics
Maximum voltage output level vs load OPPO HA-2 (the source data for the spectra)
Limit
Pure or equal class AF.A.Q.
Optimal or equal class ABF.A.Q.
Hard or equal class BF.A.Q.
Max, before clippingF.A.Q.
Level
VRMS
dBV
VRMS
dBV
VRMS
dBV
VRMS
dBV
loaded 16 ohm
0,45
-6,99
1,59
4,01
2,00
6,00
2,00
6,00
loaded 25 ohm
0,91
-0,80
2,04
6,20
2,29
7,20
2,29
7,21
loaded 31 ohm
0,92
-0,72
2,31
7,28
2,31
7,28
2,31
7,28
loaded 62 ohm
1,87
5,42
2,64
8,42
2,64
8,42
2,64
8,42
loaded 100 ohm
1,88
5,47
2,65
8,47
2,65
8,47
2,65
8,47
loaded 199 ohm
2,12
6,51
2,66
8,51
2,66
8,51
2,66
8,51
loaded 300 ohm
2,38
7,53
2,67
8,53
2,67
8,53
2,67
8,53
loaded 763 ohm
2,38
7,54
2,67
8,54
2,67
8,54
2,67
8,54
Not loaded
2,39
7,55
2,68
8,55
2,68
8,55
2,68
8,55





The maximum level of voltage from the musical power of OPPO HA-2 as AMP mode

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Brief information


Table of measured characteristics
Recommended impedances for headphones for OPPO HA-2
Recommended impedance for headphones from the range
8 - 1008 Ом для режима работы усилителя
Equivalent class A F.A.Q.
Max, before clippingF.A.Q.
For In-Ear Headphones
8 - 1007 ohm
8 - 1007 ohm
For Over-Ear Headphones
8 - 142 ohm
8 - 181 ohm


Table of measured characteristics
OPPO HA-2
Output Impedance
1.28 ohm
Power characteristics of the
Voltage
Current
Equivalent class A F.A.Q.
2.39 VRMS
7.55 dBV
31.22 mA
29.89 dB(mA)
Equivalent class AB F.A.Q.
2.68 VRMS
8.55 dBV
100.35 mA
40.03 dB(mA)
Equivalent class B F.A.Q.
2.68 VRMS
8.55 dBV
126.33 mA
42.03 dB(mA)
Maximum mode F.A.Q.
2.68 VRMS
8.55 dBV
126.33 mA
42.03 dB(mA)

Maximum current level output vs load of OPPO HA-2 as AMP mode


Graphics setting view
Channel:




Table of measured characteristics
Maximum current level output vs load OPPO HA-2 (the source data for the spectra)
Level, mA
Pure or equal class AF.A.Q.
Optimal or equal class ABF.A.Q.
Hard or equal class BF.A.Q.
Max, before clippingF.A.Q.
Level
mA
dB(mA)
mA
dB(mA)
mA
dB(mA)
mA
dB(mA)
loaded 16 ohm
28,31
29,04
100,38
40,03
126,35
42,03
126,35
42,03
loaded 25 ohm
37,25
31,42
83,38
38,42
93,56
39,42
93,59
39,42
loaded 31 ohm
30,17
29,59
75,79
37,59
75,79
37,59
75,79
37,59
loaded 62 ohm
29,90
29,51
42,24
32,51
42,24
32,51
42,24
32,51
loaded 100 ohm
18,77
25,47
26,51
28,47
26,51
28,47
26,51
28,47
loaded 199 ohm
10,64
20,54
13,40
22,54
13,40
22,54
13,40
22,54
loaded 300 ohm
7,93
17,98
8,89
18,98
8,89
18,98
8,89
18,98
loaded 763 ohm
3,12
9,89
3,50
10,89
3,50
10,89
3,50
10,89
Not loaded
0,05
-26,42
0,05
-25,42
0,05
-25,42
0,05
-25,42



Maximum power level output level vs load of OPPO HA-2 as AMP mode


Graphics setting view
Channel:




Table of measured characteristics
Maximum power level output level vs load OPPO HA-2 (the source data for the spectra)
Limit
Pure or equal class AF.A.Q.
Optimal or equal class ABF.A.Q.
Hard or equal class BF.A.Q.
Max, before clippingF.A.Q.
Level
mW
dBm
mW
dBm
mW
dBm
mW
dBm
loaded 16 ohm
12,66
11,02
159,20
22,02
252,23
24,02
252,23
24,02
loaded 25 ohm
33,99
15,31
170,33
22,31
214,44
23,31
214,58
23,32
loaded 31 ohm
27,77
14,44
175,18
22,43
175,18
22,43
175,18
22,43
loaded 62 ohm
55,80
17,47
111,34
20,47
111,34
20,47
111,34
20,47
loaded 100 ohm
35,24
15,47
70,30
18,47
70,30
18,47
70,30
18,47
loaded 199 ohm
22,52
13,53
35,69
15,53
35,69
15,53
35,69
15,53
loaded 300 ohm
18,85
12,75
23,74
13,75
23,74
13,75
23,74
13,75
loaded 763 ohm
7,44
8,72
9,37
9,72
9,37
9,72
9,37
9,72
Not loaded
0,11
-9,43
0,14
-8,43
0,14
-8,43
0,14
-8,43





THD vs load vs output voltage of OPPO HA-2 as AMP mode


Graphics setting view
Channel:
Load, ohm:
Type test:




Table of measured characteristics

Spectrum of Total Harmonic Distortion vs Level of OPPO HA-2 as AMP mode

Not loaded


Graphics setting view
Channel:
Level, dBV:

Loaded 15,8 ohm


Graphics setting view
Channel:
Level, dBV/dBm:

Loaded 24,5 ohm


Graphics setting view
Channel:
Level, dBV/dBm:

Loaded 30,5 ohm


Graphics setting view
Channel:
Level, dBV/dBm:

Loaded 62,4 ohm


Graphics setting view
Channel:
Level, dBV/dBm:

Loaded 100 ohm


Graphics setting view
Channel:
Level, dBV/dBm:

Loaded 198,9 ohm


Graphics setting view
Channel:
Level, dBV/dBm:

Loaded 300 ohm


Graphics setting view
Channel:
Level, dBV/dBm:

Loaded 763 ohm


Graphics setting view
Channel:
Level, dBV/dBm:




On-line comparison and selection services for OPPO HA-2

The automatic selection of the optimal AMP models from OPPO HA-2 .
from the measured power parameters of the amplifying part and the measured parameters of the headphones for different purpose of use.


скрыть

Measurements of OPPO HA-2 were carried out by Roman Kuznetsov on the hardware-software complex RAA.

The OPPO HA-2 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




OPPO HA-2 is available in reports and services. You are in a professional report.

Service and suite of tests

Information for entry level users

report for a newbie
(Headphone amplifier)

General recommendations

The automatic selection of the optimal AMP models

Information for all

Comparison of on-line graphs






Original text in Russian page. Translation page is not yet ready

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Comments

Commentary view:





ANDREY L.
2019-05-05 13:02:32

Комментарий к оглавлению отчетов OPPO HA-2
Добрый день Роман. Скажите пожалуйста как можно узнать какой микшер громкости установлен в данном ЦАПусь, аналоговый или цифровой?
Reply


romanrex
2019-05-05 13:30:52

Комментарий к оглавлению отчетов OPPO HA-2

ANDREY L. 2019-05-05 13:02:32
Комментарий к оглавлению отчетов OPPO HA-2
Добрый день Роман. Скажите пожалуйста как можно узнать какой микшер громкости установлен в данном ЦАПусь, аналоговый или цифровой?


Раз регулятор громкости безупорный, значит цифровой.

В редких случаях делают безупорные регуляторы с управлением матрицы резисторов на реле и там об этом отдельно сообщают (и цена сильно подскакивает).
Reply


ANDREY L.
2019-05-05 13:54:41

Комментарий к оглавлению отчетов OPPO HA-2

romanrex 2019-05-05 13:30:52
Комментарий к оглавлению отчетов OPPO HA-2
Раз регулятор громкости безупорный, значит цифровой.

В редких случаях делают безупорные регуляторы с управлением матрицы резисторов на реле и там об этом отдельно сообщают (и цена сильно подскакивает).


А на данном ЦАПусь какой регулятор, с упором или без упора? Просто в руках не держал а в характеристиках на разных профильных сайтах про это ни слово не говорится. Кстати у Вас в описании тоже это не указывается )))).
Reply


ANDREY L.
2019-05-05 14:11:12

Комментарий к оглавлению отчетов OPPO HA-2
Встретил вот такое описание более новой модели этого усилителя НА-2SE.
" Какого-либо DSP у HA-2SE, как и у предшественника, нет, а соответственно нет и цифровых обработок, которые только портят звук. Регулировка громкости встроена в чип ЦАПа, а потенциометр со стальной «крутилкой» лишь вводит в него данные".
Получается, что регулятор громкости цифровой?
Reply


romanrex
2019-05-05 15:24:45

Комментарий к оглавлению отчетов OPPO HA-2
Да, цифровой в самой микросхеме ЦАП.
Reply


ANDREY L.
2019-05-06 05:50:55



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