Measurement's report (16) AKG K 540 test and graphs (17) - Reference Audio Analyzer
AKG K 540



Reports (746) / AKG / K 540 / report for a pro (465)

(430) AKG K 540 (report for a pro (465) )



About this report (693)
This is a headphone report for professionals. (705)
You can see a simple report for "dummies" with explanations of the main characteristics for (691) AKG K 540

One device can have multiple reports in different modes and with different a suite of tests. (701)



Test report - general data (19) of AKG K 540 headphone (172)

Frequency response, Impedance, Frequency response with standard AMPs (20)


Graphics setting view (253)
Range, dB: (258)

Perception of headphone frequency response curves of equal loudness ISO 226-2009 (209)


General results (44)
General results (44) AKG K 540
Channel (37)
Center/Summary (38)
Sensitivity average in band from (171) 100 Hz to (290) 10 kHz, dB/V (284)
113,8
Impedance average in band from (283) 40 Hz to (290) 15 kHz, ohm (285)
37,9
For (286) 94,0 dB SPL need, VRMS (287)
0,103
For (286) 94,0 dB SPL need, mW (288)
0,279

The table shows a most important technical characteristics of (280) AKG K 540

*Center channel headphone is received by averaging between left and right channels (281)

*impedance value in the table for (282) Left (42) channel (30)



Test conditions (24)
  • Type of headphones (57) : Over-ear (56)
  • Measurements were performed on the stand: (89)
    • with on the simulator of human head with ears (94) HDM1
  • Headphone's impedance has been tested only with (29) Left (42) channel (30)


The tags (specifications) for this report are: (688)
Type of device (599) :
Headphones tested in (647) :
Headphones tested on (650) :
Type of headphones (57) :
The type of acoustic design (35) :


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Information for Authors. You can freely use the graphics in your articles with a link to us. If there are difficulties with the interpretation of the graphs, you can ask questions in the feedback or facebook.

Sensitivity (98) of AKG K 540 headphone (172)


Graphics setting view (253)
Channel: (259)


Brief information (819)
The sensitivity of the headphones F.A.Q. is determined by the amplitude-frequency response curve F.A.Q. with the specified sound pressure dB SPL of 1 VRMS. For 0 dB, 20 μPa is assumed.

By the sensitivity of the headphones, you can predict the volume level developed by the headphones at any chosen frequency with the known supply voltage to the headphones from the amplifier. Three-wave smoothing F.A.Q. is used to eliminate the interference of waves due to the use of a "point" microphone.

The frequency response in RAA is obtained through the reproduction and analysis of a special noise signal with the subsequent generation of an impulse response. The frequency response plot is constructed from the spectrum of the impulse response.

The difference in amplitudes of 6 dB is equivalent to a twofold ratio of signal levels.

Original text in Russian report. You can help with translation via the forum or feedback.


Table of measured characteristics (820)
Sensitivity (316) AKG K 540
Channel (37)
Left (39)
Right (40)
Sensitivity average in band from (171) 100 Hz to (290) 10 kHz, dB/V (284)
113,6
113,9
Sensitivity at (252) 500 Hz at 1 V, dB (317)
112,3
111,6
Sensitivity at (252) 500 Hz at 1 mW, dB (318)
98,0
-бесконечность
Sensitivity at (252) 1000 Hz at 1 V, dB (317)
109,1
110,6
Sensitivity at (252) 1000 Hz at 1 mW, dB (318)
94,7
-бесконечность

The sensitivity was calculated by data from the measuring stand (319) HDM1


Frequency response (22) of AKG K 540 headphone (172)


Graphics setting view (253)
Range, dB: (258)
Channel: (259)


Brief information (819)
Graph of frequency response F.A.Q. the shows the balance of the frequency of the headphones (reproduced frequency spectrum) in dB. 0 dB is the average of the amplitude.

The frequency response of the headphones can be represented as the selected equalizer setting in the player, applicable to headphones with a flat sound. Subjective "flatness" is perceived differently from external conditions: the volume level F.A.Q. of the external noise and noise isolation headphones. When connected to an amplifier, the frequency response can change F.A.Q..

The frequency response in RAA is obtained through the reproduction and analysis of a special noise signal with the subsequent generation of an impulse response. The frequency response plot is constructed from the spectrum of the impulse response.

According to the frequency response curve, it is possible to calculate the width of the frequency range F.A.Q..

The difference in amplitudes of 6 dB is equivalent to a twofold ratio of signal levels.

Original text in Russian report. You can help with translation via the forum or feedback.


Table of measured characteristics (820)
Frequency response (22) AKG K 540
Channel (37)
Left (39)
Right (40)
Variation in frequency response in band from (251) 100 Hz to (290) 10 kHz, dB (289)
-6,99, 6,05
-5,82, 4,89


Comparison of the parameters by on-line services (821)

Comparison the frequency response of (763) AKG K 540 versus other models (755)

How much frequency response of the (764) AKG K 540 different from other models? (752)
Comparison the frequency response of (763)


Impedance (23) of AKG K 540 headphone (172)



Brief information (819)
Impedance indicates the resistance of the earphone, depending on the frequency.

The vertical scale of resistance is presented on a logarithmic scale.

The impedance of the headphones affects the current consumption from the amplifier, changes in frequency response when connected to an amplifier F.A.Q. and indirectly on the sensitivity of the headphones F.A.Q. to the voltage.

Original text in Russian report. You can help with translation via the forum or feedback.


Table of measured characteristics (820)
Impedance (23) AKG K 540
Channel (37)
Left (39)
Impedance average in band from (283) 40 Hz to (290) 15 kHz, ohm (285)
37,9
Resistance at (320) 500 Hz, ohm (321)
36,7
Resistance at (320) 1000 Hz, ohm (321)
36,6
The minimum value in band from (322) 40 Hz to (290) 15 kHz at frequency, Hz (324)
4399,6
The minimum value in band from (322) 40 Hz to (290) 15 kHz, ohm (285)
36,6
The maximum value in band from (323) 40 Hz to (290) 15 kHz at frequency, Hz (324)
54,1
The maximum value in band from (323) 40 Hz to (290) 15 kHz, ohm (285)
40,4


Comparison of the parameters by on-line services (821)

Comparison of the impedance of (762) AKG K 540 versus other models (755)

How much are the characteristics of (756) AKG K 540 different from other models? (752)
This can be compared for all measured headphone models (757)


Electric phase (100) of AKG K 540 headphone (172)


Graphics setting view (253)
Range, degree: (257)


Brief information (819)
The electrical phase determines the "lightness of the load" for the amplifier.

Original text in Russian report. You can help with translation via the forum or feedback.


Table of measured characteristics (820)
Electric phase (100) AKG K 540
Channel (37)
Left (39)
Average variation in phase response in band from (326) 20 Hz to (290) 20 kHz, degree (327)
3,0
The minimum value in band from (322) 20 Hz to (290) 20 kHz at frequency, Hz (324)
126,7
The minimum value in band from (322) 20 Hz to (290) 20 kHz, degree (327)
-2,6
The maximum value in band from (323) 20 Hz to (290) 20 kHz at frequency, Hz (324)
19713,6
The maximum value in band from (323) 20 Hz to (290) 20 kHz, degree (327)
21,7

Frequency response (22) of AKG K 540 headphone (172) when connected to amplifiers with constant output impedance (870)


Graphics setting view (253)
Range, dB: (258)
Channel: (259)


Brief information (819)
The test shows the frequency response of the headphones when connected to amplifiersF.A.Q., whose output impedance is constantly operating frequency range.



For the analysis, the choice of amplifiers with resistances: 10, 20, 50, 100 and 300 Ohms.

Original text in Russian report. You can help with translation via the forum or feedback.


Table of measured characteristics (820)
Frequency response of headphone (350) AKG K 540 with amplifier with a constant impedance (351)
Channel (37)
Left (39)
Right (40)
Variation in FR from AMP (352) 0 ohm in band (353) 100 Hz to (290) 10 kHz, dB (289)
-6,99, +6,05
-5,82, +4,89
Variation in FR from AMP (352) 10 ohm in band (353) 100 Hz to (290) 10 kHz, dB (289)
-7,02, +6,08
-5,86, +4,95
Variation in FR from AMP (352) 20 ohm in band (353) 100 Hz to (290) 10 kHz, dB (289)
-7,04, +6,10
-5,88, +4,98
Variation in FR from AMP (352) 50 ohm in band (353) 100 Hz to (290) 10 kHz, dB (289)
-7,08, +6,13
-5,92, +5,05
Variation in FR from AMP (352) 100 ohm in band (353) 100 Hz to (290) 10 kHz, dB (289)
-7,11, +6,15
-5,95, +5,09
Variation in FR from AMP (352) 300 ohm in band (353) 100 Hz to (290) 10 kHz, dB (289)
-7,13, +6,17
-5,97, +5,14

The impedance was tested only (107) Left (42) channel data variance for (108) Right (43) channel generated by the data (109) Left (42) channel (30)



Deviation of frequency response (110) of AKG K 540 headphone (172) when connected to amplifiers with constant output impedance (870)


Graphics setting view (253)
Range, dB: (258)
Channel: (259)


Brief information (819)
The test shows only the change frequency response headphones F.A.Q. when connected to amplifiers, whose output impedance is constant in the operating frequency range.

At the amplifier the impedance can be of different sizes and when agreed with the impedance of the headphones, change in the frequency response F.A.Q. to varying degrees. The lower the output impedance of the amplifier and the higher the resistance of the headphones, the smaller the change.

Original text in Russian report. You can help with translation via the forum or feedback.


Table of measured characteristics (820)
Variation in frequency response with amplifiers with constant output resistance (206) from (380) AKG K 540
Channel (37)
Center/Summary (38)
With amplifier impedance at (348) 10 ohm in band (353) 20 Hz to (290) 20 kHz, dB (289)
0,2
With amplifier impedance at (348) 20 ohm in band (353) 20 Hz to (290) 20 kHz, dB (289)
0,4
With amplifier impedance at (348) 50 ohm in band (353) 20 Hz to (290) 20 kHz, dB (289)
0,6
With amplifier impedance at (348) 100 ohm in band (353) 20 Hz to (290) 20 kHz, dB (289)
0,8
With amplifier impedance at (348) 300 ohm in band (353) 20 Hz to (290) 20 kHz, dB (289)
0,9

*Center channel is received by data averaging between the left and right channels (279)

The impedance was tested only (107) Left (42) channel data variance for (108) Right (43) channel generated by the data (109) Left (42) channel (30)



Frequency response (22) of AKG K 540 headphone (172) when connected to an amplifier with zero output impedance and raising of output impedanse in low frequencies (871)


Graphics setting view (253)
Range, dB: (258)
Channel: (259)


Brief information (819)
The test shows the frequency response of the headphones when connected to amplifiersF.A.Q., whose output impedance is close to zero in the mid and high frequency range, but increases in the low frequency range.



An amplifier of this type was chosen for the analysis.

Original text in Russian report. You can help with translation via the forum or feedback.


Table of measured characteristics (820)
Frequency response with an amplifier with zero output resistance and raising of output resistance in low frequencies (207) from (380) AKG K 540
Channel (37)
Left (39)
Right (40)
Variation in frequency response in band from (251) 100 Hz to (290) 10 kHz, dB (289)
-6,93, 6,12
-5,77, 4,96

The impedance was tested only (107) Left (42) channel data variance for (108) Right (43) channel generated by the data (109) Left (42) channel (30)



Deviation of frequency response (110) of AKG K 540 headphone (172) when connected to an amplifier with zero output impedance and raising of output impedanse in low frequencies (871)


Graphics setting view (253)
Range, dB: (258)
Channel: (259)


Brief information (819)
The test shows only the change frequency response headphones F.A.Q. when connected to amplifiers, whose output impedance is constant in the operating frequency range.

The lower the impedance of headphones in the low-frequency range, the stronger the low frequencies are weakened. With high-impedance headphones, there is no noticeable change in the frequency response F.A.Q.. Original text in Russian report. You can help with translation via the forum or feedback.


Table of measured characteristics (820)
Variance of frequency response (346) AKG K 540 depending on the total output resistance of the amplifier with zero resistance and a rise of resistance at low frequencies (356)
Variance frequency response at the frequency (357) 20 Hz, dB (358)
-4,4
Variance frequency response at the frequency (357) 40 Hz, dB (358)
-1,8
Variance frequency response at the frequency (357) 80 Hz, dB (358)
-0,7

The impedance was tested only (107) Left (42) channel data variance for (108) Right (43) channel generated by the data (109) Left (42) channel (30)



Perception of headphone frequency response curves of equal loudness ISO 226-2009 (209) of AKG K 540 headphone (172)


Graphics setting view (253)
Channel: (259)


Brief information (819)
Brief information (819)
The graph shows the change in the perception of the frequency responseF.A.Q. of the headphones when listening to music with a different loudness relative to the natural level. When listening to headphones at a low volume, the perception of recoil in the low frequency range decreases, and when you listen to it at a high volume, it increases.

According to this graph, you can estimate at what volume the headphones will be perceived more flat.

The perception of the number of low frequencies depends on the volume according to the curves of equal loudness. (ISO 226-2009 Acoustics. Normal equal-loudness-level contours). For the base level, 72 dB SPL (live performance of several instruments with vocals without amplifiers with acoustics) is selected.When you select another base level, the dependence varies slightly and is suitable for almost all levels.

Examples of graphics application in practice F.A.Q..

Original text in Russian report. You can help with translation via the forum or feedback.


Table of measured characteristics (820)
Perception of headphone frequency response curves of equal loudness ISO 226-2009 (209) from (380) AKG K 540
Channel (37)
Center/Summary (38)
From level (381) 48 dB at (382) 72 dB SPL in band (383) 100 Hz to (290) 10 kHz, dB (289)
-8,9, +11,8
From level (381) 36 dB at (382) 72 dB SPL in band (383) 100 Hz to (290) 10 kHz, dB (289)
-8,3, +8,7
From level (381) 24 dB at (382) 72 dB SPL in band (383) 100 Hz to (290) 10 kHz, dB (289)
-7,6, +5,6
From level (381) 12 dB at (382) 72 dB SPL in band (383) 100 Hz to (290) 10 kHz, dB (289)
-7,0, +5,0
From level (381) 0 dB at (382) 72 dB SPL in band (383) 100 Hz to (290) 10 kHz, dB (289)
-6,4, +4,8
From level (381) -12 dB at (382) 72 dB SPL in band (383) 100 Hz to (290) 10 kHz, dB (289)
-5,8, +5,2
From level (381) -24 dB at (382) 72 dB SPL in band (383) 100 Hz to (290) 10 kHz, dB (289)
-6,4, +6,3
From level (381) -36 dB at (382) 72 dB SPL in band (383) 100 Hz to (290) 10 kHz, dB (289)
-9,1, +7,4

*Center channel is received by data averaging between the left and right channels (279)



On-line comparison and selection services for (769) AKG K 540

Comparison the frequency response (770) .
The (771) AKG K 540 was tested for a long time at the stands of the last generation and does not participate in comparison (772) . If possible, we will re-test the (773) AKG K 540 on modern stands (774) .
Compare the frequency response of a bundle of headphones and amplifiers (777) .
The (771) AKG K 540 was tested for a long time at the stands of the last generation and does not participate in comparison (772) . If possible, we will re-test the (773) AKG K 540 on modern stands (774) .

Compare the sensitivity and impedance (778) AKG K 540 versus other models (755) .

The automatic selection of the optimal AMP models (789) from (380) AKG K 540 from the measured power parameters of the amplifying part and the measured parameters of the headphones for different purpose of use (795) .

Сравнение АЧХ и звукового давления AKG K 540 в зависимости от подаваемого напряжения и импеданса усилителя.


Information for Authors. You can freely use the graphics in your articles with a link to us. If there are difficulties with the interpretation of the graphs, you can ask questions in the feedback or facebook.



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