Reference Audio Analyzer

Creative Sound Blaster X7 LE is available in reports and services. You are on the headphone sensitivity and amplifier output voltage comparison page.



Information for entry level users

reports for a newbie (Headphone amplifier)


Power and Sensitivity: Creative Sound Blaster X7 LE Hi

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General Graph Display Options
Show title of devices:

Location of names:

Parameters for displaying the graphics of the amplifier/s

Operating mode of the amplifiers F.A.Q.:

Graph Display Type:

RAW coordinates:

Graph Display Options of Headphones

Selected headphones

Location of names:

Display the info of main device (No select) :





Other parameter
Correction for the energy density of a musical signal:
dB
Peak factor in the unevenness of the music volume:
dB
Desired SPL sound pressure level when listening to music:
dB SPL




Parameters of the axis of the graph
Loaded impedance headphones:
- ohm

Range of Voltage:
- dBV
Display impedance value in dB(ohm) :





Link to this page with the selected parameters



Custom AMP
Custom AMP

Name:

Color:

Voltage:
dBV
Current:
dB(mA)
Output Impedance:
ohm

How to change the color of graphs?



Graph of Sensitivity
Graph of Sensitivity:

Color:

Sensitivity:



How to change the color of graphs?


Display headphones at specified limits
Нижняя граница
Voltage:
dBV
Current:
dB(mA)
Output Impedance:
ohm
Lower limit
Voltage:
dBV
Current:
dB(mA)
Output Impedance:
ohm




Graph display options (display, color, menu, delete) and the main characteristics of the selected devices

Selected amplifiers, characteristics (for plotting graphics) Class: Pure or equal class AF.A.Q.

Menu Delete Close Color Name Output Impedance Voltage VRMS/dBV Current mA/dB(mA)
Creative Sound Blaster X7 LE Hi 0.79 5.41 / 14.66 102.33 / 40.20
Creative Sound Blaster X7 LE 4 Ohm Low 0.00 1.00 / 0.00 1.00 / 0.00
Creative Sound Blaster X7 LE 4 Ohm 0.00 1.00 / 0.00 1.00 / 0.00
Creative Sound Blaster X7 LE 8 Ohm 0.00 1.00 / 0.00 1.00 / 0.00
Creative Sound Blaster X7 LE Low 0.00 1.00 / 0.00 1.00 / 0.00

Graph display options (display, color, menu, delete) and the main characteristics of the selected headphones

Menu Delete Close Color Close Sensitivity of voltage , dB/V SPL Impedance , ohm
AKG K 712 96.4 68.5
Audeze LCD-3 Fazor 105.4 111.2
Kennerton Thror 109.0 43.0
Monster Elements Wireless Over-Ear Analog wire 123.4 18.2
Sennheiser HD 800s 105.2 442.8
Sony MDR-MA 900 112.7 15.8


How to change the color of graphs?




Maximum level of the load
Loaded impedance headphones ohm

Equivalent power class F.A.Q. Equiv. class A Equiv. class AB Equiv. class B Max No Current limit
dBV dBV dBV dBV dBV
Creative Sound Blaster X7 LE Hi 14.4 15.4 15.4 15.4 15.4
Creative Sound Blaster X7 LE 4 Ohm Low -17.9 -17.9 -17.9 -17.9 0.0
Creative Sound Blaster X7 LE 4 Ohm -17.9 -17.9 -17.9 -17.9 0.0
Creative Sound Blaster X7 LE 8 Ohm -17.9 -17.9 -17.9 -17.9 0.0
Creative Sound Blaster X7 LE Low -17.9 -17.9 -17.9 -17.9 0.0



About maximum voltage levels of the load

To compare the amplifiers for loudness from the impedance, set the required impedance value.

Why is the "volume" expressed in dBV

When you compare amplifiers by loudness, the voltage value, expressed in dBV, should be used. The difference in voltage will show the difference in decibel (dB) between the amplifiers.

The power values in regular mW do not convenient to direct comparison.

The direct comparison by power is only suitable for speaker amplifiers operating with an ultra-low-ohm load. This does not apply to headphone amplifiers where the headphone resistance is higher than 8-16 ohms.

Because of the higher resistance of the headphones, when compare the volume of a musical signal it is necessary to simultaneously take into account the current and voltage limits. The speaker amplifier have limit by current. For the exact difference between the amplifiers in decibel, the power value must be converted into voltage in units of dBV, taking into account the margin by current for the music signal to 12 dB.

If made a comparison simply by power, then the error will reach up to 12 dB. When sorting by volume comparison, you can see that at the same volume values in dBV, the power values in mW will be different.



Рекомендации совместимости наушников c усилителями на основе технических характеристик

AKG K 712 + Creative Sound Blaster X7 LE Hi

With the measured characteristics of the AKG K 712, the sensitivity of 96.4 dB/VRMS and the impedance of 68.5 ohms, with the Creative Sound Blaster X7 LE Hi the average volume on the music signal of 90 дБ SPL in pure mode (equivalent Class A mode) will be provided. This requires an amplifier with a voltage of 13.6 dBV and a current of 24.8 dB(mA).

Creative Sound Blaster X7 LE Hi can provide voltages up to 14.6 dBV and up to a current of 40.2 dB(mA).

Creative Sound Blaster X7 LE Hi with K 712 will provide the best sound quality in the volume range from 56.0 to 91.0 dB SPL. Thus, relative the level of 90 dB SPL there is a margin of 1.0 dB above by the volume and 34.0 dB below.

Audeze LCD-3 Fazor + Creative Sound Blaster X7 LE Hi

With the measured characteristics of the Audeze LCD-3 Fazor, the sensitivity of 105.4 dB/VRMS and the impedance of 111.2 ohms, with the Creative Sound Blaster X7 LE Hi the average volume on the music signal of 90 дБ SPL in pure mode (equivalent Class A mode) will be provided. This requires an amplifier with a voltage of 4.6 dBV and a current of 11.7 dB(mA).

Creative Sound Blaster X7 LE Hi can provide voltages up to 14.6 dBV and up to a current of 40.2 dB(mA).

Creative Sound Blaster X7 LE Hi with LCD-3 Fazor will provide the best sound quality in the volume range from 65.0 to 100.0 dB SPL. Thus, relative the level of 90 dB SPL there is a margin of 10.0 dB above by the volume and 25.0 dB below.

Kennerton Thror + Creative Sound Blaster X7 LE Hi

With the measured characteristics of the Kennerton Thror, the sensitivity of 109.0 dB/VRMS and the impedance of 43.0 ohms, with the Creative Sound Blaster X7 LE Hi the average volume on the music signal of 90 дБ SPL in pure mode (equivalent Class A mode) will be provided. This requires an amplifier with a voltage of 1.0 dBV and a current of 16.4 dB(mA).

Creative Sound Blaster X7 LE Hi can provide voltages up to 14.5 dBV and up to a current of 40.2 dB(mA).

Creative Sound Blaster X7 LE Hi with Thror will provide the best sound quality in the volume range from 68.5 to 103.5 dB SPL. Thus, relative the level of 90 dB SPL there is a margin of 13.5 dB above by the volume and 21.5 dB below.

Monster Elements Wireless Over-Ear Analog wire + Creative Sound Blaster X7 LE Hi

With the measured characteristics of the Monster Elements Wireless Over-Ear Analog wire, the sensitivity of 123.4 dB/VRMS and the impedance of 18.2 ohms, with the Creative Sound Blaster X7 LE Hi the average volume on the music signal of 90 дБ SPL in pure mode (equivalent Class A mode) will be provided. This requires an amplifier with a voltage of -13.4 dBV and a current of 9.4 dB(mA).

Creative Sound Blaster X7 LE Hi can provide voltages up to 14.3 dBV and up to a current of 40.2 dB(mA).

Creative Sound Blaster X7 LE Hi with Elements Wireless Over-Ear will provide the best sound quality in the volume range from 82.7 to 117.7 dB SPL. Thus, relative the level of 90 dB SPL there is a margin of 27.7 dB above by the volume and 7.3 dB below.

Sennheiser HD 800s + Creative Sound Blaster X7 LE Hi

With the measured characteristics of the Sennheiser HD 800s, the sensitivity of 105.2 dB/VRMS and the impedance of 442.8 ohms, with the Creative Sound Blaster X7 LE Hi the average volume on the music signal of 90 дБ SPL in pure mode (equivalent Class A mode) will be provided. This requires an amplifier with a voltage of 4.8 dBV and a current of -0.1 dB(mA).

Creative Sound Blaster X7 LE Hi can provide voltages up to 14.6 dBV and up to a current of 40.2 dB(mA).

Creative Sound Blaster X7 LE Hi with HD 800s will provide the best sound quality in the volume range from 64.8 to 99.8 dB SPL. Thus, relative the level of 90 dB SPL there is a margin of 9.8 dB above by the volume and 25.2 dB below.

Sony MDR-MA 900 + Creative Sound Blaster X7 LE Hi

With the measured characteristics of the Sony MDR-MA 900, the sensitivity of 112.7 dB/VRMS and the impedance of 15.8 ohms, with the Creative Sound Blaster X7 LE Hi the average volume on the music signal of 90 дБ SPL in pure mode (equivalent Class A mode) will be provided. This requires an amplifier with a voltage of -2.7 dBV and a current of 21.4 dB(mA).

Creative Sound Blaster X7 LE Hi can provide voltages up to 14.2 dBV and up to a current of 40.2 dB(mA).

Creative Sound Blaster X7 LE Hi with MDR-MA 900 will provide the best sound quality in the volume range from 71.9 to 106.9 dB SPL. Thus, relative the level of 90 dB SPL there is a margin of 16.9 dB above by the volume and 18.1 dB below.


О рекомендациях


Рекомендации составлены для среднего уровня громкости при прослушивании музыки в 90 дБ SPL c учетом неравномерности громкости по музыкальному треку в виде пик-фактора в 20 дБ. Если Вам нужен анализ для другого звукового давления, или для определенной музыки с иным пик-фактором, задайте в настройках альтернативные значения для "Desired SPL sound pressure level when listening to music" и "Peak factor in the unevenness of the music volume". По умолчанию параметры не учитывают окружающую обстановку или шумоизоляцию наушников, предполагая, что прослушивание производится днем качественной не перекомпрессированной музыки. При анализе прослушивания музыки ночью в спокойной обстановке, стоит уменьшить звуковое давление на 12-15 дБ.

Выше на графике показаны зоны напряжения от нагрузки. Для наушников высчитывается необходимое напряжение, которое должно быть на выходе усилителя и оценивается с тем напряжением, которое может усилитель выдать. Если усилитель способен выдать большее напряжение, то высчитывается дополнительный запас по прибавке громкости или указывается, насколько громкости может не хватить. Аналогично считается и запас по регулировке громкости вниз. В большинстве случаев, при снижении громкости снижается и параметр сигнал/шум, из-за чего становится слышимым фоновый шум. При использовании аналоговых регуляторов в минимальных положениях часто наблюдается дисбаланс каналов. Диапазон регулировки громкости установлен как дБ. Если Вам известно, что устройство обладает более высокими соотношением сигнал-шум, или использует качественную реализацию регулировки громкости через реле, то увеличьте в настройках параметр "Optimal range of volume control".


Рекомендации описывают график. На графике по горизонтали отображена ось сопротивлений подключаемых наушников. По вертикали ось напряжения на выходе усилителя в единицах dBV. Точками на графике отображается необходимое напряжение для наушников для заданного звукового давления. В самом лучшем случае точка должна быть в середине по вертикали голубой зоны.

Голубая зона является наиболее качественным режимом усилителя.





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Creative Sound Blaster X7 LE is available in reports and services. You are on the headphone sensitivity and amplifier output voltage comparison page.



Information for entry level users

reports for a newbie (Headphone amplifier)



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Comments

Commentary view:





exmash
2019-02-18 00:10:02

Комментарий к сервису Voltage and Sensitivity : Beyerdynamic DT 880 Pro Default
Привильно ли понимаю, что для HD650 этого плеера хватит, а для DT880 нет?
Reply


romanrex
2019-02-18 00:56:26

Комментарий к сервису Voltage and Sensitivity : Beyerdynamic DT 880 Pro Default

exmash 2019-02-18 00:10:02
Комментарий к сервису Voltage and Sensitivity : Beyerdynamic DT 880 Pro Default
Привильно ли понимаю, что для HD650 этого плеера хватит, а для DT880 нет?


График показывает, что для общего случая C4 Pro хватит для HD650 без запаса по громкости, а для DT 880 Pro желателен источник на 2.5 дБ громче.

Но для своего случая надо выбрать знакомые наушники со знакомым источником и выяснить, какая для себя громкость является оптимальной или достаточной. И эту громкость уже сопоставить с HD650/DT 880 Pro и C4 Pro.
Reply


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