Measurement's report Violectric HPA V281 test and graphs - Reference Audio Analyzer
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Test report Violectric HPA V281

Test report - general data headphone amplifier Violectric HPA V281

Frequency response, Impedance and Frequency response with standard headphones


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Range, dB:

Devices categories
Violectric HPA V281
Channel
Summary (Right + 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
0,2
Max voltage output (unloaded), VRMS/dBV
16,71/24,5
Maximum current output at loaded 24,5 ohm, mA
217,121
Maximum power level at 62,4 ohm, mW/dBm
1913,4/32,8

The table shows a most important technical characteristics of Violectric HPA V281

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

Calculate sound pressure level in headphones with online calculator with data entered from the table for Violectric HPA V281

Test conditions




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Detailed measurements report of technical characteristics

Frequency response headphone amplifier Violectric HPA V281


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Range, dB:
Channel:

Frequency response Violectric HPA V281
Channel
Left
Right
Variation in frequency response in band from 100 Hz to 10 kHz, dB
-0,02, 0,01
-0,02, 0,01

Impedance headphone amplifier Violectric HPA V281


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Channel:

Impedance Violectric HPA V281
Channel
Left
Right
Impedance average in band from 40 Hz to 15 kHz, ohm
0,3
0,2
Resistance at 500 Hz, ohm
0,3
0,2
Resistance at 1000 Hz, ohm
0,3
0,2
The minimum value in band from 40 Hz to 15 kHz at frequency, Hz
600,5
293,4
The minimum value in band from 40 Hz to 15 kHz, ohm
0,3
0,2
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
0,3
0,2

Crosstalk headphone amplifier Violectric HPA V281


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Range, dB:
Channel:
Load, ohm:




Frequency response with loaded resistors from Violectric HPA V281


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Channel:

Frequency response of amplifier headphone amplifier Violectric HPA V281
with resistive load
Channel
Summary (Right + Left)
Variation in frequency response in band 40 Hz to 15 kHz loaded 16 ohm, dB
0,00
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




Frequency response headphone amplifier Violectric HPA V281 loaded dynamic headphone type


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Range, dB:
Channel:

Frequency response of the headphone amplifier Violectric HPA V281
loaded dynamic headphone type
Channel
Summary (Right + Left)
Variation in frequency response in band 40 Hz to 15 kHz load the dynamic type, dB
0,05

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




Deviation of frequency response headphone amplifier Violectric HPA V281 loaded dynamic headphone type


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Range, dB:
Channel:

Frequency response of amplifier Violectric HPA V281
loaded dynamic headphone type
Channel
Summary (Right + Left)
Variation in frequency response in band 40 Hz to 15 kHz load the dynamic type, dB
0,03

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




Frequency response headphone amplifier Violectric HPA V281 loaded type balance armature headphone type


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Range, dB:
Channel:

Frequency response of amplifier Violectric HPA V281
loaded type balanced armature
Channel
Summary (Right + Left)
Variation in frequency response in band 40 Hz to 15 kHz loaded type balanced armature, dB
0,15

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




Deviation of frequency response headphone amplifier Violectric HPA V281 loaded type balance armature headphone type


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Range, dB:
Channel:

Frequency response of amplifier Violectric HPA V281
loaded type balanced armature
Channel
Summary (Right + Left)
Variation in frequency response in band 40 Hz to 15 kHz loaded type balanced armature, dB
0,11

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




Maximum voltage output level vs load Violectric HPA V281


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Channel:



Maximum voltage output level vs load Violectric HPA V281 (the source data for the spectra)
Limit
Pure
Optimal
Hard
Level
VRMS
dBV
VRMS
dBV
VRMS
dBV
loaded 16 ohm
N/А
N/А
N/А
N/А
3,09
9,81
loaded 25 ohm
N/А
N/А
N/А
N/А
5,32
14,52
loaded 31 ohm
N/А
N/А
N/А
N/А
6,12
15,73
loaded 62 ohm
N/А
N/А
N/А
N/А
10,93
20,77
loaded 100 ohm
N/А
N/А
N/А
N/А
12,92
22,22
loaded 199 ohm
N/А
N/А
N/А
N/А
14,38
23,15
loaded 300 ohm
N/А
N/А
N/А
N/А
15,16
23,62
loaded 763 ohm
N/А
N/А
N/А
N/А
16,03
24,10
Not loaded
N/А
N/А
N/А
N/А
16,71
24,46


Calculate sound pressure level in headphones with online calculator with data entered from the table for Violectric HPA V281




Maximum current level output vs load Violectric HPA V281


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Channel:



Maximum current level output vs load Violectric HPA V281 (the source data for the spectra)
Limit
Pure
mA
Optimal
mA
Hard
mA
loaded 16 ohm
N/А
N/А
195,83
loaded 25 ohm
N/А
N/А
217,12
loaded 31 ohm
N/А
N/А
200,51
loaded 62 ohm
N/А
N/А
175,11
loaded 100 ohm
N/А
N/А
129,19
loaded 199 ohm
N/А
N/А
72,28
loaded 300 ohm
N/А
N/А
50,54
loaded 763 ohm
N/А
N/А
21,01
Not loaded
N/А
N/А
0,33






Maximum power level output level vs load Violectric HPA V281


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Channel:



Maximum power level output level vs load Violectric HPA V281 (the source data for the spectra)
Limit
Pure
Optimal
Hard
Level
mW
dBm
mW
dBm
mW
dBm
loaded 16 ohm
N/А
N/А
N/А
N/А
605,93
27,82
loaded 25 ohm
N/А
N/А
N/А
N/А
1154,96
30,63
loaded 31 ohm
N/А
N/А
N/А
N/А
1226,21
30,89
loaded 62 ohm
N/А
N/А
N/А
N/А
1913,40
32,82
loaded 100 ohm
N/А
N/А
N/А
N/А
1669,12
32,22
loaded 199 ohm
N/А
N/А
N/А
N/А
1039,17
30,17
loaded 300 ohm
N/А
N/А
N/А
N/А
766,36
28,84
loaded 763 ohm
N/А
N/А
N/А
N/А
336,74
25,27
Not loaded
N/А
N/А
N/А
N/А
5,59
7,47






THD vs load vs output voltage Violectric HPA V281


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Channel:
Load, ohm:
Type test:




Spectrum of Total Harmonic Distortion vs Level headphone amplifier Violectric HPA V281

Not loaded


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Channel:
Level, dBV:

Loaded 15,8 ohm


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Channel:
Level, dBV/dBm:

Loaded 24,5 ohm


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Channel:
Level, dBV/dBm:

Loaded 30,5 ohm


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Channel:
Level, dBV/dBm:

Loaded 62,4 ohm


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Channel:
Level, dBV/dBm:

Loaded 100 ohm


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Channel:
Level, dBV/dBm:

Loaded 198,9 ohm


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Channel:
Level, dBV/dBm:

Loaded 300 ohm


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Channel:
Level, dBV/dBm:

Loaded 763 ohm


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Channel:
Level, dBV/dBm:


Spectrum of IMD SMPTE vs Level headphone amplifier Violectric HPA V281

Not loaded


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Frequency band, Hz:
Channel:
Level, dBV:

Loaded 15,8 ohm


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Frequency band, Hz:
Channel:
Level, dBV/dBm:

Loaded 24,5 ohm


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Frequency band, Hz:
Channel:
Level, dBV/dBm:

Loaded 30,5 ohm


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Frequency band, Hz:
Channel:
Level, dBV/dBm:

Loaded 62,4 ohm


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Frequency band, Hz:
Channel:
Level, dBV/dBm:

Loaded 100 ohm


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Frequency band, Hz:
Channel:
Level, dBV/dBm:

Loaded 198,9 ohm


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Frequency band, Hz:
Channel:
Level, dBV/dBm:

Loaded 300 ohm


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Frequency band, Hz:
Channel:
Level, dBV/dBm:

Loaded 763 ohm


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Frequency band, Hz:
Channel:
Level, dBV/dBm:


Spectrum of IMD CCIF vs Level headphone amplifier Violectric HPA V281

Not loaded


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Channel:
Level, dBV:

Loaded 15,8 ohm


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Channel:
Level, dBV/dBm:

Loaded 24,5 ohm


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Channel:
Level, dBV/dBm:

Loaded 30,5 ohm


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Channel:
Level, dBV/dBm:

Loaded 62,4 ohm


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Channel:
Level, dBV/dBm:

Loaded 100 ohm


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Channel:
Level, dBV/dBm:

Loaded 198,9 ohm


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Channel:
Level, dBV/dBm:

Loaded 300 ohm


Graphics setting view
Channel:
Level, dBV/dBm:

Loaded 763 ohm


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Channel:
Level, dBV/dBm:


Spectrum of Multitone Distortion vs Level vs Load headphone amplifier Violectric HPA V281

Not loaded


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Channel:
Level, dBV:
Type test:

Loaded 15,8 ohm


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Channel:
Level, dBV/dBm:
Type test:

Loaded 24,5 ohm


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Channel:
Level, dBV/dBm:
Type test:

Loaded 30,5 ohm


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Channel:
Level, dBV/dBm:
Type test:

Loaded 62,4 ohm


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Channel:
Level, dBV/dBm:
Type test:

Loaded 100 ohm


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Channel:
Level, dBV/dBm:
Type test:

Loaded 198,9 ohm


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Channel:
Level, dBV/dBm:
Type test:

Loaded 300 ohm


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Channel:
Level, dBV/dBm:
Type test:

Loaded 763 ohm


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Channel:
Level, dBV/dBm:
Type test:


Spectrum of Noise Distortion vs Level vs Load headphone amplifier Violectric HPA V281

Not loaded


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Channel:
Level, dBV:

Loaded 15,8 ohm


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Channel:
Level, dBV/dBm:

Loaded 24,5 ohm


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Channel:
Level, dBV/dBm:

Loaded 30,5 ohm


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Channel:
Level, dBV/dBm:

Loaded 62,4 ohm


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Channel:
Level, dBV/dBm:

Loaded 100 ohm


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Channel:
Level, dBV/dBm:

Loaded 198,9 ohm


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Channel:
Level, dBV/dBm:

Loaded 300 ohm


Graphics setting view
Channel:
Level, dBV/dBm:

Loaded 763 ohm


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Channel:
Level, dBV/dBm: