Measurement's report E-MU 0204 USB test and graphs - Reference Audio Analyzer

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Reports / E-MU / 0204 USB / Amplifier path / report for a pro

Conducted technical work on updating the report. Charts may temporarily not be displayed at the time of the work.

Test report E-MU 0204 USB (report for a pro)






Test report - general data of E-MU 0204 USB as AMP mode

Frequency response, Impedance and Frequency response with standard headphones


Graphics setting view
Range, dB:


General results
General results
E-MU 0204 USB
Channel
Left
Average variation in FR in the band 40 Hz to 15 kHz, dB
-0,03, 0,02
Average value of impedance band in 40 Hz to 15 kHz, ohm
23,4
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 E-MU 0204 USB



Test conditions
  • For record of test signals RAA was used ADC: E-MU 1616m
  • During tests RAA software-hardware measuring complex was used galvanic isolated power transformer and was excluded the effect of ground loop in the spectra



Frequency response of E-MU 0204 USB as AMP mode


Graphics setting view
Range, dB:




Table of measured characteristics
Frequency response E-MU 0204 USB
Channel
Left
Variation in frequency response in band from 100 Hz to 10 kHz, dB
-0,02, 0,02

Impedance of E-MU 0204 USB as AMP mode





Table of measured characteristics
Impedance E-MU 0204 USB
Channel
Left
Impedance average in band from 40 Hz to 15 kHz, ohm
23,4
Resistance at 500 Hz, ohm
23,3
Resistance at 1000 Hz, ohm
23,4
The minimum value in band from 40 Hz to 15 kHz at frequency, Hz
40,4
The minimum value in band from 40 Hz to 15 kHz, ohm
23,3
The maximum value in band from 40 Hz to 15 kHz at frequency, Hz
119,6
The maximum value in band from 40 Hz to 15 kHz, ohm
23,4

Frequency response of E-MU 0204 USB with loaded resistors as AMP mode


Graphics setting view
Range, dB:




Table of measured characteristics
Frequency response of amplifier headphone amplifier E-MU 0204 USB
with resistive load
Channel
Left
Variation in frequency response in band 40 Hz to 15 kHz loaded 16 ohm, dB
0,03
Variation in frequency response in band 40 Hz to 15 kHz loaded 32 ohm, dB
0,02
Variation in frequency response in band 40 Hz to 15 kHz loaded 50 ohm, dB
0,02
Variation in frequency response in band 40 Hz to 15 kHz loaded 100 ohm, dB
0,01
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

Frequency response of E-MU 0204 USB loaded dynamic headphone type as AMP mode


Graphics setting view
Range, dB:




Table of measured characteristics
Frequency response of the headphone amplifier E-MU 0204 USB
loaded dynamic headphone type
Channel
Left
Variation in frequency response in band 40 Hz to 15 kHz load the dynamic type, dB
2,02

Deviation of frequency response of E-MU 0204 USB loaded dynamic headphone type as AMP mode


Graphics setting view
Range, dB:




Table of measured characteristics
Frequency response of amplifier E-MU 0204 USB
loaded dynamic headphone type
Channel
Left
Variation in frequency response in band 40 Hz to 15 kHz load the dynamic type, dB
2,02

Frequency response of E-MU 0204 USB loaded type balance armature headphone type (one driver) as AMP mode


Graphics setting view
Range, dB:




Table of measured characteristics
Frequency response of amplifier E-MU 0204 USB
loaded type balanced armature
Channel
Left
Variation in frequency response in band 40 Hz to 15 kHz loaded type balanced armature, dB
6,58

Deviation of frequency response of E-MU 0204 USB loaded type balance armature headphone type (one driver) as AMP mode


Graphics setting view
Range, dB:




Table of measured characteristics
Frequency response of amplifier E-MU 0204 USB
loaded type balanced armature
Channel
Left
Variation in frequency response in band 40 Hz to 15 kHz loaded type balanced armature, dB
6,57



Maximum voltage output level vs load of E-MU 0204 USB as AMP mode





Table of measured characteristics

The device was tested for a long time, a method of constructing the graph and table were outdated and not suitable for direct comparison of values between different devices. The current data are the closest to "Before hard overload" as the maximum level before clipping. The latest version of the methodology uses to build on the characters of the spectra and divided into "Pure power @ class A", "Optimal power @ class AB", "Hard power @ B class" and "Before hard overload".

Now the original data to update the graph and table no. Require re-testing of the device. Re-test will be conducted only in the presence of the device in a test lab RAA.

CloseMore detailed
Reports and testing methodology is gradually updated. We try to generate the report in such a way that it would have been a single kind of report for all devices, convenient for direct comparison.

We constantly introduce new tests and improving the options for displaying graphs and parameters. It introduces different changes in reports. Because reports are generated automatically, the updates do not take much time.

In the development and implementation of new tests, new reports are more complete. To update some charts and tables may require additional time to process the raw data separately for each device.

Some devices require re-testing.



The maximum voltage level load before overload or the certain level of distortion E-MU 0204 USB
(the values of the maximum current and voltage)
Limit
Pure
Optimal
Hard
Level
VRMS
dBV
VRMS
dBV
VRMS
dBV
loaded 16 ohm
N/А
N/А
N/А
N/А
0,53
-5,56
loaded 24 ohm
N/А
N/А
N/А
N/А
0,79
-2,06
loaded 30 ohm
N/А
N/А
N/А
N/А
0,99
-0,06
loaded 50 ohm
N/А
N/А
N/А
N/А
1,26
1,99
loaded 100 ohm
N/А
N/А
N/А
N/А
1,49
3,49
loaded 200 ohm
N/А
N/А
N/А
N/А
1,65
4,35
loaded 300 ohm
N/А
N/А
N/А
N/А
1,71
4,67
loaded 600 ohm
N/А
N/А
N/А
N/А
1,78
4,98
loaded 750 ohm
N/А
N/А
N/А
N/А
1,79
5,05





Maximum current level output vs load of E-MU 0204 USB as AMP mode





Table of measured characteristics

The device was tested for a long time, a method of constructing the graph and table were outdated and not suitable for direct comparison of values between different devices. The current data are the closest to "Before hard overload" as the maximum level before clipping. The latest version of the methodology uses to build on the characters of the spectra and divided into "Pure power @ class A", "Optimal power @ class AB", "Hard power @ B class" and "Before hard overload".

Now the original data to update the graph and table no. Require re-testing of the device. Re-test will be conducted only in the presence of the device in a test lab RAA.

CloseMore detailed
Reports and testing methodology is gradually updated. We try to generate the report in such a way that it would have been a single kind of report for all devices, convenient for direct comparison.

We constantly introduce new tests and improving the options for displaying graphs and parameters. It introduces different changes in reports. Because reports are generated automatically, the updates do not take much time.

In the development and implementation of new tests, new reports are more complete. To update some charts and tables may require additional time to process the raw data separately for each device.

Some devices require re-testing.



Maximum output current level vs load at overload or achive the certain level of distortion E-MU 0204 USB
(the values of the maximum current and voltage)
Limit
Pure
mA
Optimal
mA
Hard
mA
loaded 16 ohm
N/А
N/А
32,96
loaded 24 ohm
N/А
N/А
32,96
loaded 30 ohm
N/А
N/А
32,96
loaded 50 ohm
N/А
N/А
25,08
loaded 100 ohm
N/А
N/А
14,94
loaded 200 ohm
N/А
N/А
8,27
loaded 300 ohm
N/А
N/А
5,68
loaded 600 ohm
N/А
N/А
2,95
loaded 750 ohm
N/А
N/А
2,38



Maximum power level output level vs load of E-MU 0204 USB as AMP mode





Table of measured characteristics

The device was tested for a long time, a method of constructing the graph and table were outdated and not suitable for direct comparison of values between different devices. The current data are the closest to "Before hard overload" as the maximum level before clipping. The latest version of the methodology uses to build on the characters of the spectra and divided into "Pure power @ class A", "Optimal power @ class AB", "Hard power @ B class" and "Before hard overload".

Now the original data to update the graph and table no. Require re-testing of the device. Re-test will be conducted only in the presence of the device in a test lab RAA.

CloseMore detailed
Reports and testing methodology is gradually updated. We try to generate the report in such a way that it would have been a single kind of report for all devices, convenient for direct comparison.

We constantly introduce new tests and improving the options for displaying graphs and parameters. It introduces different changes in reports. Because reports are generated automatically, the updates do not take much time.

In the development and implementation of new tests, new reports are more complete. To update some charts and tables may require additional time to process the raw data separately for each device.

Some devices require re-testing.



Maximum output power level vs load at overload or achive the certain level of distortion E-MU 0204 USB
(the values of the maximum current and voltage)
Limit
Pure
Optimal
Hard
Level
mW
dBm
mW
dBm
mW
dBm
loaded 16 ohm
N/А
N/А
N/А
N/А
0,02
-35,20
loaded 24 ohm
N/А
N/А
N/А
N/А
0,03
-31,70
loaded 30 ohm
N/А
N/А
N/А
N/А
0,03
-29,70
loaded 50 ohm
N/А
N/А
N/А
N/А
0,03
-30,03
loaded 100 ohm
N/А
N/А
N/А
N/А
0,02
-33,02
loaded 200 ohm
N/А
N/А
N/А
N/А
0,01
-37,30
loaded 300 ohm
N/А
N/А
N/А
N/А
0,01
-40,25
loaded 600 ohm
N/А
N/А
N/А
N/А
0,01
-45,61
loaded 750 ohm
N/А
N/А
N/А
N/А
0,00
-47,40





THD vs load vs output voltage of E-MU 0204 USB as AMP mode


Graphics setting view
Load, ohm:




Table of measured characteristics





Измерения E-MU 0204 USB проведены Романом Кузнецовым на программно-аппаратном комплексе RAA.

Тест E-MU 0204 USB проведен как черного ящика, без учета стоимости и престижа. Это главный принцип измерений и разработки тестов в RAA.

Считаю, что важно делать не абсолютную оценку устройства, а совокупную оценку при совместной работе с наушниками и учетом внешних факторов. Это позволяет эффективно раскрывать потенциал всей связки устройств или делать более оптимальный подбор компонентов.




Kuznetsov Roman
Founder of RAA



Known by the nickname romanrex
Аuthor of articles iXBT.com




E-MU 0204 USB 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

Information for all






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