Measurement's report 64 Audio U4 Close Vent Outside test and graphs - Reference Audio Analyzer

Reports / 64 Audio / U4 / Close Vent Outside / report for a pro

64 Audio U4: Close Vent Outside (report for a pro)



Test report - general data of 64 Audio U4 Close Vent Outside headphone

Frequency response, Impedance, Frequency response with standard AMPs


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

Perception of headphone frequency response curves of equal loudness ISO 226-2009


General results
General results 64 Audio U4 Close Vent Outside
Channel
Center/Summary
Sensitivity average in band from 100 Hz to 10 kHz, dB/V
137,4
Impedance average in band from 40 Hz to 15 kHz, ohm
10,8
For 94,0 dB SPL need, VRMS
0,007
For 94,0 dB SPL need, mW
0,004

The table shows a most important technical characteristics of 64 Audio U4 Close Vent Outside

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



Test conditions
  • Type of headphones: In-Ear or Tablet
  • Measurements were performed on the stand:
    • Solid simulator-bushing SIEC (emulation of auditory channel)



Sensitivity of 64 Audio U4 Close Vent Outside headphone


Graphics setting view
Frequency band, Hz:
Channel:




Table of measured characteristics
Sensitivity 64 Audio U4 Close Vent Outside
Channel
Left
Right
Sensitivity average in band from 100 Hz to 10 kHz, dB/V
137,2
137,5
Sensitivity at 500 Hz at 1 V, dB
137,3
137,5
Sensitivity at 500 Hz at 1 mW, dB
116,9
117,1
Sensitivity at 1000 Hz at 1 V, dB
134,8
135,5
Sensitivity at 1000 Hz at 1 mW, dB
115,9
116,6

The sensitivity was calculated by data from the measuring stand SIEC


Frequency response of 64 Audio U4 Close Vent Outside headphone


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




Table of measured characteristics
Frequency response 64 Audio U4 Close Vent Outside
Channel
Left
Right
Variation in frequency response in band from 100 Hz to 10 kHz, dB
-8,64, 5,36
-10,04, 4,90


The RMS variation between the right and left channels
64 Audio U4 Close Vent Outside from stand SIEC
Deviation between channels in band 40 Hz to 15 kHz, dB
0,6
Deviation between channels in low-frequency range 40 Hz to 200Гц, дБ
0,2
Deviation between channels in mid-frequency range 200 Hz to 2 kHz, dB
0,3
Deviation between channels in hi-frequency range 2 kHz 15 kHz, dB
1,0

Impedance of 64 Audio U4 Close Vent Outside headphone


Graphics setting view
Frequency band, Hz:
Channel:




Table of measured characteristics
Impedance 64 Audio U4 Close Vent Outside
Channel
Left
Right
Impedance average in band from 40 Hz to 15 kHz, ohm
10,9
10,7
Resistance at 500 Hz, ohm
9,1
9,0
Resistance at 1000 Hz, ohm
12,9
12,8
The minimum value in band from 40 Hz to 15 kHz at frequency, Hz
40,7
41,4
The minimum value in band from 40 Hz to 15 kHz, ohm
7,2
7,1
The maximum value in band from 40 Hz to 15 kHz at frequency, Hz
14986,4
14986,4
The maximum value in band from 40 Hz to 15 kHz, ohm
22,9
22,2

Electric phase of 64 Audio U4 Close Vent Outside headphone


Graphics setting view
Frequency band, Hz:
Range, degree:
Channel:




Table of measured characteristics
Electric phase 64 Audio U4 Close Vent Outside
Channel
Left
Right
Average variation in phase response in band from 20 Hz to 20 kHz, degree
18,7
18,5
The minimum value in band from 20 Hz to 20 kHz at frequency, Hz
2542,4
2631,6
The minimum value in band from 20 Hz to 20 kHz, degree
-8,8
-4,8
The maximum value in band from 20 Hz to 20 kHz at frequency, Hz
18747,3
17803,2
The maximum value in band from 20 Hz to 20 kHz, degree
58,9
58,8

Frequency response of 64 Audio U4 Close Vent Outside headphone when connected to amplifiers with constant output impedance


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




Table of measured characteristics
Frequency response of headphone 64 Audio U4 Close Vent Outside with amplifier with a constant impedance
Channel
Left
Right
Variation in FR from AMP 0 ohm in band 100 Hz to 10 kHz, dB
-8,64, +5,36
-10,04, +4,90
Variation in FR from AMP 10 ohm in band 100 Hz to 10 kHz, dB
-7,03, +3,80
-8,43, +4,01
Variation in FR from AMP 20 ohm in band 100 Hz to 10 kHz, dB
-6,45, +3,91
-7,85, +4,54
Variation in FR from AMP 50 ohm in band 100 Hz to 10 kHz, dB
-5,85, +4,53
-7,23, +5,10
Variation in FR from AMP 100 ohm in band 100 Hz to 10 kHz, dB
-5,57, +4,83
-6,93, +5,37
Variation in FR from AMP 300 ohm in band 100 Hz to 10 kHz, dB
-5,34, +5,07
-6,70, +5,58

Deviation of frequency response of 64 Audio U4 Close Vent Outside headphone when connected to amplifiers with constant output impedance


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




Table of measured characteristics
Variation in frequency response with amplifiers with constant output resistance from 64 Audio U4 Close Vent Outside
Channel
Center/Summary
With amplifier impedance at 10 ohm in band 20 Hz to 20 kHz, dB
5,0
With amplifier impedance at 20 ohm in band 20 Hz to 20 kHz, dB
7,0
With amplifier impedance at 50 ohm in band 20 Hz to 20 kHz, dB
9,3
With amplifier impedance at 100 ohm in band 20 Hz to 20 kHz, dB
10,5
With amplifier impedance at 300 ohm in band 20 Hz to 20 kHz, dB
11,5

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


Frequency response of 64 Audio U4 Close Vent Outside headphone when connected to an amplifier with zero output impedance and raising of output impedanse in low frequencies


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




Table of measured characteristics
Frequency response with an amplifier with zero output resistance and raising of output resistance in low frequencies from 64 Audio U4 Close Vent Outside
Channel
Left
Right
Variation in frequency response in band from 100 Hz to 10 kHz, dB
-8,29, 3,35
-9,69, 3,47

Deviation of frequency response of 64 Audio U4 Close Vent Outside headphone when connected to an amplifier with zero output impedance and raising of output impedanse in low frequencies


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




Table of measured characteristics
Variance of frequency response 64 Audio U4 Close Vent Outside depending on the total output resistance of the amplifier with zero resistance and a rise of resistance at low frequencies
Variance frequency response at the frequency 20 Hz, dB
-13,3
Variance frequency response at the frequency 40 Hz, dB
-7,1
Variance frequency response at the frequency 80 Hz, dB
-3,1

Perception of headphone frequency response curves of equal loudness ISO 226-2009 of 64 Audio U4 Close Vent Outside headphone


Graphics setting view
Channel:




Table of measured characteristics
Perception of headphone frequency response curves of equal loudness ISO 226-2009 from 64 Audio U4 Close Vent Outside
Channel
Center/Summary
From level 48 dB at 72 dB SPL in band 100 Hz to 10 kHz, dB
-9,8, +17,3
From level 36 dB at 72 dB SPL in band 100 Hz to 10 kHz, dB
-8,9, +14,3
From level 24 dB at 72 dB SPL in band 100 Hz to 10 kHz, dB
-9,1, +11,2
From level 12 dB at 72 dB SPL in band 100 Hz to 10 kHz, dB
-9,2, +8,2
From level 0 dB at 72 dB SPL in band 100 Hz to 10 kHz, dB
-9,3, +5,1
From level -12 dB at 72 dB SPL in band 100 Hz to 10 kHz, dB
-9,4, +4,0
From level -24 dB at 72 dB SPL in band 100 Hz to 10 kHz, dB
-9,5, +5,1
From level -36 dB at 72 dB SPL in band 100 Hz to 10 kHz, dB
-9,6, +6,1

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


Impulse response of 64 Audio U4 Close Vent Outside headphone


Graphics setting view
Time, ms:
Channel:



Impulse Response Envelope (ETC - Energy Time Curve) of 64 Audio U4 Close Vent Outside headphone


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Time, ms:
Range, dB:
Channel:



Step response of 64 Audio U4 Close Vent Outside headphone


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Time, ms:
Channel:





Square wave of 64 Audio U4 Close Vent Outside headphone

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