Available
to listen to
in the RAA showroom
Availableto listen to
in the RAA showroom
Test report - general data of Musatoff HA-4 as AMP mode
The maximum level of voltage from the musical power
General results
General results
Musatoff HA-4
Musatoff HA-4
Channel
Center/Summary
Average variation in FR in the band 40 Hz to 15 kHz, dB
-0,05, 0,01
Average value of impedance band in 40 Hz to 15 kHz, ohm
0,0
Max voltage output
VRMS
dBV
Pure or equal class A
5,47
14,75
Optimal or equal class AB
5,47
14,75
Hard or equal class B
5,47
14,75
Max, before clipping
5,47
14,75
Maximum current output at loaded
ohm
mA
Pure or equal class A
100,0
37,90
Optimal or equal class AB
62,4
38,48
Hard or equal class B
62,4
38,48
Max, before clipping
62,4
43,18
Max power output
ohm
mW
dBm
Pure or equal class A
198,9
150,09
21,76
Optimal or equal class AB
198,9
150,09
21,76
Hard or equal class B
198,9
150,09
21,76
Max, before clipping
100,0
180,86
22,57
The table shows a most important technical characteristics of Musatoff HA-4
*Center channel is received by data averaging between the left and right channels
Test conditions
- For record of test signals RAA was used ADC: E-MU 1616m
- The difference between maximum levels output unloaded Musatoff HA-4 and input level 0 dBFS E-MU1616m is -3,03 dB (value level for left and right channels)
- The signal was played to the amplifier with DAC: Audiolab M-DAC
- Was exposed to the level of the signal: Optimal (none maximum) level
- The bit size/format of the test signal: PCM 24 bit
- During tests RAA software-hardware measuring complex was used galvanic isolated power transformer and was excluded the effect of ground loop in the spectra
Detailed measurements report of technical characteristics
Report content
- Frequency response
- Frequency response with loaded resistors
- Frequency response vs load dynamic type headphones | Variation in frequency response dependence of load dynamic type headphones
- Frequency response vs load balance armature headphone type (one driver) | Variation in frequency response vs load balance armature headphone type (one driver)
- Crosstalk
- Impedance
- Maximum level:
- voltage from the musical power for the amplifier output
- voltage output level vs load of sine
- current output level vs load of sine
- power output level vs load of sine
- THD vs load vs output voltage
Spectra vs Amplitude
- Harmonic distortion spectrum vs amplitude vs loaded
- Not loaded
- Loaded 15,8 ohm
- Loaded 24,5 ohm
- Loaded 30,5 ohm
- Loaded 62,4 ohm
- Loaded 100 ohm
- Loaded 198,9 ohm
- Loaded 300 ohm
- Loaded 763 ohm
- Spectrum of IMD SMPTE vs Level
- Not loaded
- Loaded 15,8 ohm
- Loaded 24,5 ohm
- Loaded 30,5 ohm
- Loaded 62,4 ohm
- Loaded 100 ohm
- Loaded 198,9 ohm
- Loaded 300 ohm
- Loaded 763 ohm
- Spectrum of IMD CCIF vs Level
- Not loaded
- Loaded 15,8 ohm
- Loaded 24,5 ohm
- Loaded 30,5 ohm
- Loaded 62,4 ohm
- Loaded 100 ohm
- Loaded 198,9 ohm
- Loaded 300 ohm
- Loaded 763 ohm
- Spectrum of Multitone Distortion vs Level vs Load
- Not loaded
- Loaded 15,8 ohm
- Loaded 24,5 ohm
- Loaded 30,5 ohm
- Loaded 62,4 ohm
- Loaded 100 ohm
- Loaded 198,9 ohm
- Loaded 300 ohm
- Loaded 763 ohm
- Spectrum of Noise Distortion vs Level vs Load
Graphics setting view
Range, dB:
Channel:
Table of measured characteristics
Frequency response Musatoff HA-4
Channel
Left
Right
Variation in frequency response in band from 100 Hz to 10 kHz, dB
-0,02, 0,00
-0,02, 0,00
Graphics setting view
Channel:
Table of measured characteristics
Impedance Musatoff HA-4
Channel
Left
Right
Impedance average in band from 40 Hz to 15 kHz, ohm
0,0
0,0
Resistance at 500 Hz, ohm
0,0
0,0
Resistance at 1000 Hz, ohm
0,0
0,0
The minimum value in band from 40 Hz to 15 kHz at frequency, Hz
45,6
45,6
The minimum value in band from 40 Hz to 15 kHz, ohm
0,0
0,0
The maximum value in band from 40 Hz to 15 kHz at frequency, Hz
45,6
45,6
The maximum value in band from 40 Hz to 15 kHz, ohm
0,0
0,0
Graphics setting view
Range, dB:
Channel:
Load, ohm:
Table of measured characteristics
Graphics setting view
Range, dB:
Channel:
Table of measured characteristics
Frequency response of amplifier headphone amplifier Musatoff HA-4
with resistive load
with resistive load
Channel
Center/Summary
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
Graphics setting view
Range, dB:
Channel:
Table of measured characteristics
Frequency response of the headphone amplifier Musatoff HA-4
loaded dynamic headphone type
loaded dynamic headphone type
Channel
Center/Summary
Variation in frequency response in band 40 Hz to 15 kHz load the dynamic type, dB
0,07
*Center channel is received by data averaging between the left and right channels
Graphics setting view
Range, dB:
Channel:
Table of measured characteristics
Frequency response of amplifier Musatoff HA-4
loaded dynamic headphone type
loaded dynamic headphone type
Channel
Center/Summary
Variation in frequency response in band 40 Hz to 15 kHz load the dynamic type, dB
0,00
*Center channel is received by data averaging between the left and right channels
Frequency response of Musatoff HA-4 loaded type balance armature headphone type (one driver) as AMP mode
Graphics setting view
Range, dB:
Channel:
Table of measured characteristics
Frequency response of amplifier Musatoff HA-4
loaded type balanced armature
loaded type balanced armature
Channel
Center/Summary
Variation in frequency response in band 40 Hz to 15 kHz loaded type balanced armature, dB
0,07
*Center channel is received by data averaging between the left and right channels
Deviation of frequency response of Musatoff HA-4 loaded type balance armature headphone type (one driver) as AMP mode
Graphics setting view
Range, dB:
Channel:
Table of measured characteristics
Frequency response of amplifier Musatoff HA-4
loaded type balanced armature
loaded type balanced armature
Channel
Center/Summary
Variation in frequency response in band 40 Hz to 15 kHz loaded type balanced armature, dB
0,00
*Center channel is received by data averaging between the left and right channels
Graphics setting view
Channel:
Table of measured characteristics
Maximum voltage output level vs load Musatoff HA-4 (the source data for the spectra)
Limit
Pure or equal class A
Optimal or equal class AB
Hard or equal class B
Max, before clipping
Level
VRMS
dBV
VRMS
dBV
VRMS
dBV
VRMS
dBV
loaded 16 ohm
0,54
-5,40
0,60
-4,39
0,60
-4,39
0,68
-3,39
loaded 25 ohm
0,83
-1,59
0,93
-0,59
0,93
-0,59
1,05
0,41
loaded 31 ohm
1,04
0,31
1,16
1,31
1,16
1,31
1,30
2,31
loaded 62 ohm
2,14
6,61
2,40
7,61
2,40
7,61
2,69
8,61
loaded 100 ohm
3,79
11,57
3,79
11,57
3,79
11,57
4,25
12,57
loaded 199 ohm
5,46
14,75
5,46
14,75
5,46
14,75
5,46
14,75
loaded 300 ohm
5,46
14,75
5,46
14,75
5,46
14,75
5,46
14,75
loaded 763 ohm
5,47
14,75
5,47
14,75
5,47
14,75
5,47
14,75
Not loaded
5,47
14,75
5,47
14,75
5,47
14,75
5,47
14,75
Table of measured characteristics
Recommended impedances for headphones for Musatoff HA-4
Recommended impedance for headphones from the range
8 - 1008 Ом для режима работы усилителя
8 - 1008 Ом для режима работы усилителя
Equivalent class A
Max, before clipping
For In-Ear Headphones
8 - 1007 ohm
8 - 1007 ohm
For Over-Ear Headphones
32 - 607 ohm
21 - 607 ohm
Table of measured characteristics
Musatoff HA-4
Output Impedance
0.01 ohm
Power characteristics of the
Voltage
Current
Equivalent class A
5.46 VRMS
14.75 dBV
14.75 dBV
34.79 mA
30.83 dB(mA)
30.83 dB(mA)
Equivalent class AB
5.46 VRMS
14.75 dBV
14.75 dBV
38.15 mA
31.63 dB(mA)
31.63 dB(mA)
Equivalent class B
5.46 VRMS
14.75 dBV
14.75 dBV
38.15 mA
31.63 dB(mA)
31.63 dB(mA)
Maximum mode
5.46 VRMS
14.75 dBV
14.75 dBV
42.81 mA
32.63 dB(mA)
32.63 dB(mA)
Graphics setting view
Channel:
Table of measured characteristics
Maximum current level output vs load Musatoff HA-4 (the source data for the spectra)
Level, mA
Pure or equal class A
Optimal or equal class AB
Hard or equal class B
Max, before clipping
Level
mA
dB(mA)
mA
dB(mA)
mA
dB(mA)
mA
dB(mA)
loaded 16 ohm
34,01
30,63
38,16
31,63
38,16
31,63
42,82
32,63
loaded 25 ohm
33,97
30,62
38,12
31,62
38,12
31,62
42,78
32,62
loaded 31 ohm
33,96
30,62
38,11
31,62
38,11
31,62
42,76
32,62
loaded 62 ohm
34,30
30,71
38,48
31,71
38,48
31,71
43,18
32,71
loaded 100 ohm
37,90
31,57
37,90
31,57
37,90
31,57
42,53
32,57
loaded 199 ohm
27,47
28,78
27,47
28,78
27,47
28,78
27,47
28,78
loaded 300 ohm
18,22
25,21
18,22
25,21
18,22
25,21
18,22
25,21
loaded 763 ohm
7,16
17,10
7,16
17,10
7,16
17,10
7,16
17,10
Not loaded
0,11
-19,23
0,11
-19,23
0,11
-19,23
0,11
-19,23
Graphics setting view
Channel:
Table of measured characteristics
Maximum power level output level vs load Musatoff HA-4 (the source data for the spectra)
Limit
Pure or equal class A
Optimal or equal class AB
Hard or equal class B
Max, before clipping
Level
mW
dBm
mW
dBm
mW
dBm
mW
dBm
loaded 16 ohm
18,27
12,62
23,01
13,62
23,01
13,62
28,97
14,62
loaded 25 ohm
28,28
14,51
35,60
15,52
35,60
15,52
44,83
16,52
loaded 31 ohm
35,18
15,46
44,29
16,46
44,29
16,46
55,76
17,46
loaded 62 ohm
73,41
18,66
92,42
19,66
92,42
19,66
116,35
20,66
loaded 100 ohm
143,65
21,57
143,65
21,57
143,65
21,57
180,86
22,57
loaded 199 ohm
150,09
21,76
150,09
21,76
150,09
21,76
150,09
21,76
loaded 300 ohm
99,54
19,98
99,54
19,98
99,54
19,98
99,54
19,98
loaded 763 ohm
39,16
15,93
39,16
15,93
39,16
15,93
39,16
15,93
Not loaded
0,60
-2,24
0,60
-2,24
0,60
-2,24
0,60
-2,24
Graphics setting view
Channel:
Load, ohm:
Type test:
Table of measured characteristics
On-line comparison and selection services for Musatoff HA-4
Comparison of basic characteristics Musatoff HA-4 versus other models.
Voltage, Current and Impedance
Voltage, Current and Impedance
Comparison of the power characteristics of Musatoff HA-4 and interaction headphones.
Additional headphone compatibility analytics.
Additional headphone compatibility analytics.
The automatic selection of the optimal AMP models from Musatoff HA-4 .
from the measured power parameters of the amplifying part and the measured parameters of the headphones for different purpose of use.
from the measured power parameters of the amplifying part and the measured parameters of the headphones for different purpose of use.
Close ⊗
Measurements of Musatoff HA-4 were carried out by Roman Kuznetsov on the hardware-software complex RAA.
The Musatoff HA-4 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.
I believe that it is important to do not make an absolute assessment of the device, but an aggregate assessment when working together with a headphones and taking into account external factors. This allows you to effectively reveal the potential of the entire set of devices or to make a more optimal choice of components.
Kuznetsov Roman
Founder of RAA
Musatoff HA-4 is available in reports and services. You are in a professional report.
Information for entry level users
Information for all
Versus of characteristics
Versus of characteristics
Information for professionals
Comparison of on-line graphs
Comparison of on-line graphs
- Comparison of basic characteristics
- Comparison of the frequency response/SPL of the bundles of headphones and amplifiers
- Voltage and Sensitivity
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