Measurement's report QLS Quloos QA390 Balance Super Hi - Hi test and graphs - Reference Audio Analyzer

Reports / QLS / Quloos QA390 / Balance Super Hi - Hi / A set of device tests as a headphone amplifier - report for a pro

Test report QLS Quloos QA390: Balance Super Hi - Hi (report for a pro)






Test report - general data of QLS Quloos QA390 Balance Super Hi - Hi as AMP mode

Frequency response, Impedance and Frequency response with standard headphones


Graphics setting view
Range, dB:

The maximum level of voltage from the musical power


General results
General results
QLS Quloos QA390 Balance Super Hi - Hi
Channel
Center/Summary
Average variation in FR in the band 40 Hz to 15 kHz, dB
-0,15, 0,04
Average value of impedance band in 40 Hz to 15 kHz, ohm
0,4
Max voltage output
VRMS
dBV
Pure or equal class A
13,38
22,53
Optimal or equal class AB
18,90
25,53
Hard or equal class B
18,90
25,53
Max, before clipping
18,90
25,53
Maximum current output at loaded
ohm
mA
Pure or equal class A
15,8
198,50
Optimal or equal class AB
15,8
222,72
Hard or equal class B
15,8
222,72
Max, before clipping
15,8
222,72
Max power output
ohm
mW
dBm
Pure or equal class A
62,4
1588,83
32,01
Optimal or equal class AB
62,4
2518,03
34,01
Hard or equal class B
62,4
2518,03
34,01
Max, before clipping
62,4
2518,03
34,01

The table shows a most important technical characteristics of QLS Quloos QA390 Balance Super Hi - Hi

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



Test conditions



Frequency response of QLS Quloos QA390 Balance Super Hi - Hi as AMP mode


Graphics setting view
Range, dB:
Channel:




Table of measured characteristics
Frequency response QLS Quloos QA390 Balance Super Hi - Hi
Channel
Left
Right
Variation in frequency response in band from 100 Hz to 10 kHz, dB
-0,09, 0,04
-0,09, 0,04

Impedance of QLS Quloos QA390 Balance Super Hi - Hi as AMP mode


Graphics setting view
Channel:




Table of measured characteristics
Impedance QLS Quloos QA390 Balance Super Hi - Hi
Channel
Left
Right
Impedance average in band from 40 Hz to 15 kHz, ohm
0,4
0,3
Resistance at 500 Hz, ohm
0,4
0,3
Resistance at 1000 Hz, ohm
0,4
0,3
The minimum value in band from 40 Hz to 15 kHz at frequency, Hz
3349,4
3349,4
The minimum value in band from 40 Hz to 15 kHz, ohm
0,4
0,3
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
0,4
0,3

Crosstalk of QLS Quloos QA390 Balance Super Hi - Hi as AMP mode


Graphics setting view
Range, dB:
Channel:
Load, ohm:




Table of measured characteristics

Crosstalk Phase of QLS Quloos QA390 Balance Super Hi - Hi as AMP mode


Graphics setting view
Channel:
Load, ohm:



Frequency response of QLS Quloos QA390 Balance Super Hi - Hi with loaded resistors as AMP mode


Graphics setting view
Range, dB:
Channel:




Table of measured characteristics
Frequency response of amplifier headphone amplifier QLS Quloos QA390 Balance Super Hi - Hi
with resistive load
Channel
Center/Summary
Variation in frequency response in band 40 Hz to 15 kHz loaded 16 ohm, dB
0,01
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 of QLS Quloos QA390 Balance Super Hi - Hi loaded dynamic headphone type as AMP mode


Graphics setting view
Range, dB:
Channel:




Table of measured characteristics
Frequency response of the headphone amplifier QLS Quloos QA390 Balance Super Hi - Hi
loaded dynamic headphone type
Channel
Center/Summary
Variation in frequency response in band 40 Hz to 15 kHz load the dynamic type, dB
0,25

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


Deviation of frequency response of QLS Quloos QA390 Balance Super Hi - Hi loaded dynamic headphone type as AMP mode


Graphics setting view
Range, dB:
Channel:




Table of measured characteristics
Frequency response of amplifier QLS Quloos QA390 Balance Super Hi - Hi
loaded dynamic headphone type
Channel
Center/Summary
Variation in frequency response in band 40 Hz to 15 kHz load the dynamic type, dB
0,04

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


Frequency response of QLS Quloos QA390 Balance Super Hi - Hi 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 QLS Quloos QA390 Balance Super Hi - Hi
loaded type balanced armature
Channel
Center/Summary
Variation in frequency response in band 40 Hz to 15 kHz loaded type balanced armature, dB
0,17

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


Deviation of frequency response of QLS Quloos QA390 Balance Super Hi - Hi 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 QLS Quloos QA390 Balance Super Hi - Hi
loaded type balanced armature
Channel
Center/Summary
Variation in frequency response in band 40 Hz to 15 kHz loaded type balanced armature, dB
0,17

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




Maximum voltage output level vs load of QLS Quloos QA390 Balance Super Hi - Hi as AMP mode


Graphics setting view
Channel:




Table of measured characteristics
Maximum voltage output level vs load QLS Quloos QA390 Balance Super Hi - Hi (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
3,14
9,93
3,52
10,93
3,52
10,93
3,52
10,93
loaded 25 ohm
3,76
11,50
4,22
12,50
4,22
12,50
4,22
12,50
loaded 31 ohm
5,60
14,97
6,29
15,97
6,29
15,97
6,29
15,97
loaded 62 ohm
9,96
19,96
12,53
21,96
12,53
21,96
12,53
21,96
loaded 100 ohm
12,57
21,98
14,10
22,99
14,10
22,99
14,10
22,99
loaded 199 ohm
13,34
22,51
16,80
24,51
16,80
24,51
16,80
24,51
loaded 300 ohm
13,35
22,51
16,81
24,51
16,81
24,51
16,81
24,51
loaded 763 ohm
13,37
22,52
18,88
25,52
18,88
25,52
18,88
25,52
Not loaded
13,38
22,53
18,90
25,53
18,90
25,53
18,90
25,53





The maximum level of voltage from the musical power of QLS Quloos QA390 Balance Super Hi - Hi as AMP mode




Brief information


Table of measured characteristics
Recommended impedances for headphones for QLS Quloos QA390 Balance Super Hi - Hi
Recommended impedance for headphones from the range
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
8 - 1007 ohm
8 - 1007 ohm


Table of measured characteristics
QLS Quloos QA390 Balance Super Hi - Hi
Output Impedance
0.36 ohm
Power characteristics of the
Voltage
Current
Equivalent class A
13.38 VRMS
22.53 dBV
172.95 mA
44.76 dB(mA)
Equivalent class AB
18.90 VRMS
25.53 dBV
199.72 mA
46.01 dB(mA)
Equivalent class B
18.90 VRMS
25.53 dBV
199.72 mA
46.01 dB(mA)
Maximum mode
18.90 VRMS
25.53 dBV
199.72 mA
46.01 dB(mA)

Maximum current level output vs load of QLS Quloos QA390 Balance Super Hi - Hi as AMP mode


Graphics setting view
Channel:




Table of measured characteristics
Maximum current level output vs load QLS Quloos QA390 Balance Super Hi - Hi (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
198,50
45,96
222,72
46,96
222,72
46,96
222,72
46,96
loaded 25 ohm
153,44
43,72
172,16
44,72
172,16
44,72
172,16
44,72
loaded 31 ohm
183,75
45,28
206,22
46,29
206,22
46,29
206,22
46,29
loaded 62 ohm
159,57
44,06
200,88
46,06
200,88
46,06
200,88
46,06
loaded 100 ohm
125,67
41,98
141,01
42,99
141,01
42,99
141,01
42,99
loaded 199 ohm
67,09
36,53
84,46
38,53
84,46
38,53
84,46
38,53
loaded 300 ohm
44,51
32,97
56,04
34,97
56,04
34,97
56,04
34,97
loaded 763 ohm
17,52
24,87
24,75
27,87
24,75
27,87
24,75
27,87
Not loaded
0,27
-11,45
0,38
-8,45
0,38
-8,45
0,38
-8,45



Maximum power level output level vs load of QLS Quloos QA390 Balance Super Hi - Hi as AMP mode


Graphics setting view
Channel:




Table of measured characteristics
Maximum power level output level vs load QLS Quloos QA390 Balance Super Hi - Hi (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
622,56
27,94
783,75
28,94
783,75
28,94
783,75
28,94
loaded 25 ohm
576,79
27,61
726,16
28,61
726,16
28,61
726,16
28,61
loaded 31 ohm
1029,83
30,13
1297,12
31,13
1297,12
31,13
1297,12
31,13
loaded 62 ohm
1588,83
32,01
2518,03
34,01
2518,03
34,01
2518,03
34,01
loaded 100 ohm
1579,41
31,98
1988,43
32,99
1988,43
32,99
1988,43
32,99
loaded 199 ohm
895,18
29,52
1418,86
31,52
1418,86
31,52
1418,86
31,52
loaded 300 ohm
594,41
27,74
942,13
29,74
942,13
29,74
942,13
29,74
loaded 763 ohm
234,15
23,69
467,21
26,70
467,21
26,70
467,21
26,70
Not loaded
3,58
5,54
7,14
8,54
7,14
8,54
7,14
8,54





THD vs load vs output voltage of QLS Quloos QA390 Balance Super Hi - Hi as AMP mode


Graphics setting view
Channel:
Load, ohm:
Type test:




Table of measured characteristics

Spectrum of Total Harmonic Distortion vs Level of QLS Quloos QA390 Balance Super Hi - Hi as AMP mode

Not loaded


Graphics setting view
Channel:
Level, dBV:

Loaded 15,8 ohm


Graphics setting view
Channel:
Level, dBV/dBm:

Loaded 24,5 ohm


Graphics setting view
Channel:
Level, dBV/dBm:

Loaded 30,5 ohm


Graphics setting view
Channel:
Level, dBV/dBm:

Loaded 62,4 ohm


Graphics setting view
Channel:
Level, dBV/dBm:

Loaded 100 ohm


Graphics setting view
Channel:
Level, dBV/dBm:

Loaded 198,9 ohm


Graphics setting view
Channel:
Level, dBV/dBm:

Loaded 300 ohm


Graphics setting view
Channel:
Level, dBV/dBm:

Loaded 763 ohm


Graphics setting view
Channel:
Level, dBV/dBm:



Spectrum of IMD SMPTE vs Level of QLS Quloos QA390 Balance Super Hi - Hi as AMP mode

Not loaded


Graphics setting view
Frequency band, Hz:
Channel:
Level, dBV:

Loaded 15,8 ohm


Graphics setting view
Frequency band, Hz:
Channel:
Level, dBV/dBm:

Loaded 24,5 ohm


Graphics setting view
Frequency band, Hz:
Channel:
Level, dBV/dBm:

Loaded 30,5 ohm


Graphics setting view
Frequency band, Hz:
Channel:
Level, dBV/dBm:

Loaded 62,4 ohm


Graphics setting view
Frequency band, Hz:
Channel:
Level, dBV/dBm:

Loaded 100 ohm


Graphics setting view
Frequency band, Hz:
Channel:
Level, dBV/dBm:

Loaded 198,9 ohm


Graphics setting view
Frequency band, Hz:
Channel:
Level, dBV/dBm:

Loaded 300 ohm


Graphics setting view
Frequency band, Hz:
Channel:
Level, dBV/dBm:

Loaded 763 ohm


Graphics setting view
Frequency band, Hz:
Channel:
Level, dBV/dBm:



Spectrum of IMD CCIF vs Level of QLS Quloos QA390 Balance Super Hi - Hi as AMP mode

Not loaded


Graphics setting view
Channel:
Level, dBV:

Loaded 15,8 ohm


Graphics setting view
Channel:
Level, dBV/dBm:

Loaded 24,5 ohm


Graphics setting view
Channel:
Level, dBV/dBm:

Loaded 30,5 ohm


Graphics setting view
Channel:
Level, dBV/dBm:

Loaded 62,4 ohm


Graphics setting view
Channel:
Level, dBV/dBm:

Loaded 100 ohm


Graphics setting view
Channel:
Level, dBV/dBm:

Loaded 198,9 ohm


Graphics setting view
Channel:
Level, dBV/dBm:

Loaded 300 ohm


Graphics setting view
Channel:
Level, dBV/dBm:

Loaded 763 ohm


Graphics setting view
Channel:
Level, dBV/dBm:



Spectrum of Multitone Distortion vs Level vs Load of QLS Quloos QA390 Balance Super Hi - Hi as AMP mode

Not loaded


Graphics setting view
Channel:
Level, dBV:

Loaded 15,8 ohm


Graphics setting view
Channel:
Level, dBV/dBm:

Loaded 24,5 ohm


Graphics setting view
Channel:
Level, dBV/dBm:

Loaded 30,5 ohm


Graphics setting view
Channel:
Level, dBV/dBm:

Loaded 62,4 ohm


Graphics setting view
Channel:
Level, dBV/dBm:

Loaded 100 ohm


Graphics setting view
Channel:
Level, dBV/dBm:

Loaded 198,9 ohm


Graphics setting view
Channel:
Level, dBV/dBm:

Loaded 300 ohm


Graphics setting view
Channel:
Level, dBV/dBm:

Loaded 763 ohm


Graphics setting view
Channel:
Level, dBV/dBm:




On-line comparison and selection services for QLS Quloos QA390

Comparison of basic characteristics: Voltage, Current and Impedance

Compare a changed frequency response the bundles of Quloos QA390 and headphones.

Comparison of amplifiers by loudness (Volume Level).

Comparison of the power characteristics of AMPs and interaction headphones. Additional headphone compatibility analytics.

Comparison of the optimal range of volume control

The automatic selection of the optimal AMP models.


Close

Measurements of QLS Quloos QA390 Balance Super Hi - Hi were carried out by Roman Kuznetsov on the hardware-software complex RAA.

The QLS Quloos QA390 Balance Super Hi - Hi 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



Known by the nickname romanrex
Аuthor of articles iXBT.com



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