Measurement's report Sennheiser HD 25 II test and graphs - Reference Audio Analyzer

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Sennheiser HD 25 II (report for a pro)



Test report - general data of Sennheiser HD 25 II headphone

Frequency response, Impedance, Frequency response with standard AMPs


Graphics setting view
Stands:
Range, dB:

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


General results
General results Sennheiser HD 25 II
Channel
Center/Summary
Sensitivity average in band from 100 Hz to 10 kHz, dB/V
108,3
Impedance average in band from 40 Hz to 15 kHz, ohm
75,0
For 94,0 dB SPL need, VRMS
0,194
For 94,0 dB SPL need, mW
0,499

The table shows a most important technical characteristics of Sennheiser HD 25 II

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



Test conditions
  • Type of headphones: On-ear
  • Measurements were performed on the stands:
    • with on the simulator of human head with ears HDM1
    • with soft flat stand SF1
  • Table's data are based on the results from the test stand HDM1



Sensitivity of Sennheiser HD 25 II headphone


Graphics setting view
Stands:
Channel:




Table of measured characteristics
Sensitivity Sennheiser HD 25 II
Channel
Left
Right
Sensitivity average in band from 100 Hz to 10 kHz, dB/V
108,3
108,2
Sensitivity at 500 Hz at 1 V, dB
112,1
113,5
Sensitivity at 500 Hz at 1 mW, dB
97,7
98,5
Sensitivity at 1000 Hz at 1 V, dB
110,5
111,8
Sensitivity at 1000 Hz at 1 mW, dB
97,8
98,1

The sensitivity was calculated by data from the measuring stand HDM1


Frequency response of Sennheiser HD 25 II headphone


Graphics setting view
Stands:
Range, dB:
Channel:




Table of measured characteristics
Frequency response Sennheiser HD 25 II
Channel
Left
Right
Variation in frequency response in band from 100 Hz to 10 kHz, dB
-5,37, 5,58
-4,41, 4,06


The RMS variation between the right and left channels
Sennheiser HD 25 II from stand SF1
Deviation between channels in band 40 Hz to 15 kHz, dB
0,7
Deviation between channels in low-frequency range 40 Hz to 200Гц, дБ
0,4
Deviation between channels in mid-frequency range 200 Hz to 2 kHz, dB
0,5
Deviation between channels in hi-frequency range 2 kHz 15 kHz, dB
0,3

Impedance of Sennheiser HD 25 II headphone


Graphics setting view
Channel:




Table of measured characteristics
Impedance Sennheiser HD 25 II
Channel
Left
Right
Impedance average in band from 40 Hz to 15 kHz, ohm
76,1
74,0
Resistance at 500 Hz, ohm
75,6
73,6
Resistance at 1000 Hz, ohm
73,9
72,1
The minimum value in band from 40 Hz to 15 kHz at frequency, Hz
4655,7
4508,9
The minimum value in band from 40 Hz to 15 kHz, ohm
72,0
70,2
The maximum value in band from 40 Hz to 15 kHz at frequency, Hz
104,5
111,5
The maximum value in band from 40 Hz to 15 kHz, ohm
82,9
79,6

Electric phase of Sennheiser HD 25 II headphone


Graphics setting view
Range, degree:
Channel:




Table of measured characteristics
Electric phase Sennheiser HD 25 II
Channel
Left
Right
Average variation in phase response in band from 20 Hz to 20 kHz, degree
2,5
2,6
The minimum value in band from 20 Hz to 20 kHz at frequency, Hz
331,3
300,9
The minimum value in band from 20 Hz to 20 kHz, degree
-2,7
-2,4
The maximum value in band from 20 Hz to 20 kHz at frequency, Hz
19682,2
19682,2
The maximum value in band from 20 Hz to 20 kHz, degree
16,1
16,9

Frequency response of Sennheiser HD 25 II headphone when connected to amplifiers with constant output impedance


Graphics setting view
Stands:
Range, dB:
Channel:




Table of measured characteristics
Frequency response of headphone Sennheiser HD 25 II with amplifier with a constant impedance
Channel
Left
Right
Variation in FR from AMP 0 ohm in band 100 Hz to 10 kHz, dB
-5,20, +6,72
-10,02, +9,18
Variation in FR from AMP 10 ohm in band 100 Hz to 10 kHz, dB
-5,15, +6,70
-9,94, +9,16
Variation in FR from AMP 20 ohm in band 100 Hz to 10 kHz, dB
-5,12, +6,68
-9,88, +9,15
Variation in FR from AMP 50 ohm in band 100 Hz to 10 kHz, dB
-5,04, +6,65
-9,75, +9,12
Variation in FR from AMP 100 ohm in band 100 Hz to 10 kHz, dB
-4,97, +6,62
-9,63, +9,09
Variation in FR from AMP 300 ohm in band 100 Hz to 10 kHz, dB
-4,89, +6,58
-9,47, +9,06

Deviation of frequency response of Sennheiser HD 25 II headphone when connected to amplifiers with constant output impedance


Graphics setting view
Stands:
Range, dB:
Channel:




Table of measured characteristics
Variation in frequency response with amplifiers with constant output resistance from Sennheiser HD 25 II
Channel
Center/Summary
With amplifier impedance at 10 ohm in band 20 Hz to 20 kHz, dB
0,1
With amplifier impedance at 20 ohm in band 20 Hz to 20 kHz, dB
0,3
With amplifier impedance at 50 ohm in band 20 Hz to 20 kHz, dB
0,5
With amplifier impedance at 100 ohm in band 20 Hz to 20 kHz, dB
0,7
With amplifier impedance at 300 ohm in band 20 Hz to 20 kHz, dB
1,0

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


Frequency response of Sennheiser HD 25 II headphone when connected to an amplifier with zero output impedance and raising of output impedanse in low frequencies


Graphics setting view
Stands:
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 Sennheiser HD 25 II
Channel
Left
Right
Variation in frequency response in band from 100 Hz to 10 kHz, dB
-5,37, 5,38
-4,41, 3,85

Deviation of frequency response of Sennheiser HD 25 II headphone when connected to an amplifier with zero output impedance and raising of output impedanse in low frequencies


Graphics setting view
Stands:
Range, dB:
Channel:




Table of measured characteristics
Variance of frequency response Sennheiser HD 25 II 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
-2,7
Variance frequency response at the frequency 20 Hz, dB
-2,7
Variance frequency response at the frequency 40 Hz, dB
-1,0
Variance frequency response at the frequency 40 Hz, dB
-1,0
Variance frequency response at the frequency 80 Hz, dB
-0,3
Variance frequency response at the frequency 80 Hz, dB
-0,3

Perception of headphone frequency response curves of equal loudness ISO 226-2009 of Sennheiser HD 25 II headphone


Graphics setting view
Stands:
Channel:




Table of measured characteristics
Perception of headphone frequency response curves of equal loudness ISO 226-2009 from Sennheiser HD 25 II
Channel
Center/Summary
From level 48 dB at 72 dB SPL in band 100 Hz to 10 kHz, dB
-5,7, +7,6
From level 36 dB at 72 dB SPL in band 100 Hz to 10 kHz, dB
-4,6, +7,5
From level 24 dB at 72 dB SPL in band 100 Hz to 10 kHz, dB
-3,6, +7,6
From level 12 dB at 72 dB SPL in band 100 Hz to 10 kHz, dB
-4,9, +7,7
From level 0 dB at 72 dB SPL in band 100 Hz to 10 kHz, dB
-7,4, +7,9
From level -12 dB at 72 dB SPL in band 100 Hz to 10 kHz, dB
-10,4, +8,2
From level -24 dB at 72 dB SPL in band 100 Hz to 10 kHz, dB
-13,3, +8,5
From level -36 dB at 72 dB SPL in band 100 Hz to 10 kHz, dB
-16,0, +8,8

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

Table's data are based on the results from the test stand HDM1



On-line comparison and selection services for Sennheiser HD 25 II

Compare the sensitivity and impedance Sennheiser HD 25 II versus other models.

The automatic selection of the optimal AMP models from Sennheiser HD 25 II from the measured power parameters of the amplifying part and the measured parameters of the headphones for different purpose of use.

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Measurements of Sennheiser HD 25 II were carried out by Roman Kuznetsov on the hardware-software complex RAA.

The Sennheiser HD 25 II 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




Sennheiser HD 25 II is available in reports and services. You are in a professional report.

Service and suite of tests

Information for all

Comparison of on-line graphs

Information for professionals

report for a pro

Comparison of on-line graphs






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