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 / DAC Line Out / report for a pro

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






Test report - general data of OPPO HA-2 as Line Out mode

Frequency response


Graphics setting view
Frequency band, Hz:
Range, dB:

Spectrum of Total Harmonic Distortion (THD)

Spectrum of Jitter



General results
General results OPPO HA-2
Channel
Center/Summary
Variation in frequency response in band from 100 Hz to 10 kHz, dB
-0,02, 0,06
Max voltage output at 0 dBFS, VRMS
1,05
Max voltage output at 0 dBFS, dBV
0,43
Max voltage output at 0 dBFS, dBu
2,64
Harmonic distortion at 0,0 dBFS @ 1 kHz, dB
-106,9
Total harmonic distortion at 0,0 dBFS @ 1 kHz, %
0,000449
Harmonic distortion at -3,0 dBFS @ 1 kHz, dB
-109,8
Total harmonic distortion at -3,0 dBFS @ 1 kHz, %
0,000324

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

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



Test conditions



Frequency response of OPPO HA-2 as Line Out mode


Graphics setting view
Frequency band, Hz:
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, 0,06
-0,02, 0,06

THD vs output voltage of line out of OPPO HA-2 as Line Out mode


Graphics setting view
Channel:
Type test:




Table of measured characteristics
THD vs output voltage of line out OPPO HA-2
Max voltage output at 0 dBFS, VRMS
1,05
Max voltage output at 0 dBFS, dBV
0,43
Max voltage output at 0 dBFS, dBu
2,64


Total Harmonic Distortion vs Level (dBFS) of OPPO HA-2 as Line Out mode


Graphics setting view
Channel:
Type test:



Impulse response of OPPO HA-2 as Line Out mode


Graphics setting view
Time, ms:
Channel:



Impulse Response Envelope (ETC - Energy Time Curve) of OPPO HA-2 as Line Out mode


Graphics setting view
Time, ms:
Range, dB:
Channel:



Step response of OPPO HA-2 as Line Out mode


Graphics setting view
Time, ms:
Channel:





Spectra of high resolution

Noise floor spectrum of OPPO HA-2 (High resolution graph) as Line Out mode


Graphics setting view
Range, dB:
Channel:
Scale:



Spectrum of Total Harmonic Distortion (THD) of OPPO HA-2 (High resolution graph) as Line Out mode


Graphics setting view
Range, dB:
Channel:
Level, dBFS:
Scale:




Table of measured characteristics
Harmonic distortion
OPPO HA-2
Harmonic distortion at 0,0 dBFS @ 1 kHz, dB
-106,9
Total harmonic distortion at 0,0 dBFS @ 1 kHz, %
0,000449
Harmonic distortion at -3,0 dBFS @ 1 kHz, dB
-109,8
Total harmonic distortion at -3,0 dBFS @ 1 kHz, %
0,000324




Table of measured characteristics
The levels of harmonics when applying signal 1 kHz 0 dBFS
OPPO HA-2
Harmonic, number
1
2
3
4
5
6
7
8
9
10
The level of harmonics, dB
0,0
-109,3
-112,0
-133,5
-121,5
-125,9
-120,9
-135,2
-128,5
-149,1
Harmonic, number
11
12
13
14
15
16
17
18
19
20
The level of harmonics, dB
-137,6
-131,5
-138,7
-137,2
-134,9
-138,0
-134,2
-143,2
-139,4
-136,9


The levels of harmonics when applying signal 1 kHz -3 dBFS
OPPO HA-2
Harmonic, number
1
2
3
4
5
6
7
8
9
10
The level of harmonics, dB
-3,0
-114,0
-134,1
-132,6
-124,1
-134,9
-122,9
-133,0
-129,3
-155,4
Harmonic, number
11
12
13
14
15
16
17
18
19
20
The level of harmonics, dB
-141,2
-153,0
-135,8
-146,3
-135,2
-145,0
-146,2
-143,0
-139,3
-136,9
The data in the tables correspond to by average value of left and right channels

Spectrum of Dynamic Range (-60 dBFS) of OPPO HA-2 (High resolution graph) as Line Out mode


Graphics setting view
Range, dB:
Channel:
Scale:



Sine low ammplitude spectrum -90 dBFS of OPPO HA-2 (High resolution graph) as Line Out mode


Graphics setting view
Range, dB:
Channel:
Scale:



Spectrum of Intermodulation Distortion (IMD) - SMPTE of OPPO HA-2 (High resolution graph) as Line Out mode


Graphics setting view
Frequency band, Hz:
Range, dB:
Channel:
Level, dBFS:
Scale:



Spectrum of Intermodulation Distortion (IMD) - CCIF of OPPO HA-2 (High resolution graph) as Line Out mode


Graphics setting view
Range, dB:
Channel:
Level, dBFS:



Spectrum of Jitter of OPPO HA-2 (High resolution graph) as Line Out mode


Graphics setting view
Frequency band, Hz:
Range, dB:
Channel:
Type test:




Table of measured characteristics
The accuracy of the playback speed OPPO HA-2
Fundamental tone 11025 Hz, Hz
11025,1682
Variance from 11025 Hz, Hz
0,1682

Spectra vs Amplitude

Total Harmonic Distortion vs Level (dBFS) of OPPO HA-2 as Line Out mode


Graphics setting view
Channel:
Level, dBFS:



Close

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.



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






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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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