Reference Audio Analyzer

FiiO X1 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: FiiO X1

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General Graph Display Options
Show title of devices:

Location of names:

Parameters for displaying the graphics of the amplifier/s

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

Characteristics of the amplifier part from FiiO X1

Output Impedance 1.82 ohm
Power characteristics of the Voltage Current
VRMS dBV mA dB(mA)
Equivalent class A F.A.Q. 1.32 2.43 1.36 2.65
Equivalent class AB F.A.Q. 1.48 3.43 66.76 36.49
Equivalent class B F.A.Q. 1.48 3.43 66.76 36.49
Maximum mode F.A.Q. 1.48 3.43 66.76 36.49

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
Apple EarPods 118.0 42.2
Dunu DN-2002 133.5 5.9
Enigma Acoustics & Lotoo Dharma D200 125.0 30.2
Sunrise Dragon Default 122.2 119.5
Sunrise Feeling 2 123.8 18.2
xDuoo EP1 131.8 16.9


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
FiiO X1 -15.2 2.9 2.9 2.9 2.9



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

Apple EarPods + FiiO X1

With the measured characteristics of the Apple EarPods, the sensitivity of 118.0 dB/VRMS and the impedance of 42.2 ohms, with the FiiO X1 the average volume on the music signal of 90 дБ SPL in pure mode (equivalent Class A mode) will not be provided. This requires an amplifier with a voltage of -8.0 dBV and a current of 7.5 dB(mA).

FiiO X1 can provide voltages up to 2.1 dBV and up to a current of 2.7 dB(mA). Due to the current limit, the maximum voltage with a headphone impedance of 42.2 Ohm in pure mode will be -12.8 dBV.

FiiO X1 with EarPods will provide the best sound quality in the volume range from 65.1 to 85.2 dB SPL. Thus, relative the level of 90dB SPL there is no any margin by the volume up. In the lower quality mode, the FiiO X1 provides up to 101.1 dB SPL, which gives a margin of 11.1 dB.

Dunu DN-2002 + FiiO X1

With the measured characteristics of the Dunu DN-2002, the sensitivity of 133.5 dB/VRMS and the impedance of 5.9 ohms, with the FiiO X1 the average volume on the music signal of 90 дБ SPL in pure mode (equivalent Class A mode) will not be provided. This requires an amplifier with a voltage of -23.5 dBV and a current of 9.1 dB(mA).

FiiO X1 can provide voltages up to 0.1 dBV and up to a current of 2.7 dB(mA). Due to the current limit, the maximum voltage with a headphone impedance of 5.9 Ohm in pure mode will be -29.9 dBV.

FiiO X1 with DN-2002 will provide the best sound quality in the volume range from 78.6 to 83.6 dB SPL. Thus, relative the level of 90dB SPL there is no any margin by the volume up. In the lower quality mode, the FiiO X1 provides up to 114.6 dB SPL, which gives a margin of 24.6 dB.

Enigma Acoustics & Lotoo Dharma D200 + FiiO X1

With the measured characteristics of the Enigma Acoustics & Lotoo Dharma D200, the sensitivity of 125.0 dB/VRMS and the impedance of 30.2 ohms, with the FiiO X1 the average volume on the music signal of 90 дБ SPL in pure mode (equivalent Class A mode) will not be provided. This requires an amplifier with a voltage of -15.0 dBV and a current of 3.3 dB(mA).

FiiO X1 can provide voltages up to 1.9 dBV and up to a current of 2.7 dB(mA). Due to the current limit, the maximum voltage with a headphone impedance of 30.2 Ohm in pure mode will be -15.7 dBV.

FiiO X1 with Dharma D200 will provide the best sound quality in the volume range from 72.0 to 89.3 dB SPL. Thus, relative the level of 90dB SPL there is no any margin by the volume up. In the lower quality mode, the FiiO X1 provides up to 108.0 dB SPL, which gives a margin of 18.0 dB.

Sunrise Dragon Default + FiiO X1

With the measured characteristics of the Sunrise Dragon Default, the sensitivity of 122.2 dB/VRMS and the impedance of 119.5 ohms, with the FiiO X1 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 -12.2 dBV and a current of -5.7 dB(mA).

FiiO X1 can provide voltages up to 2.3 dBV and up to a current of 2.7 dB(mA). Due to the current limit, the maximum voltage with a headphone impedance of 119.5 Ohm in pure mode will be -3.8 dBV.

FiiO X1 with Dragon will provide the best sound quality in the volume range from 69.5 to 98.4 dB SPL. Thus, relative the level of 90 dB SPL there is a margin of 8.4 dB above by the volume and 20.5 dB below.

Sunrise Feeling 2 + FiiO X1

With the measured characteristics of the Sunrise Feeling 2, the sensitivity of 123.8 dB/VRMS and the impedance of 18.2 ohms, with the FiiO X1 the average volume on the music signal of 90 дБ SPL in pure mode (equivalent Class A mode) will not be provided. This requires an amplifier with a voltage of -13.8 dBV and a current of 9.0 dB(mA).

FiiO X1 can provide voltages up to 1.6 dBV and up to a current of 2.7 dB(mA). Due to the current limit, the maximum voltage with a headphone impedance of 18.2 Ohm in pure mode will be -20.2 dBV.

FiiO X1 with Feeling 2 will provide the best sound quality in the volume range from 70.4 to 83.7 dB SPL. Thus, relative the level of 90dB SPL there is no any margin by the volume up. In the lower quality mode, the FiiO X1 provides up to 106.4 dB SPL, which gives a margin of 16.4 dB.

xDuoo EP1 + FiiO X1

With the measured characteristics of the xDuoo EP1, the sensitivity of 131.8 dB/VRMS and the impedance of 16.9 ohms, with the FiiO X1 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 -21.8 dBV and a current of 1.6 dB(mA).

FiiO X1 can provide voltages up to 1.5 dBV and up to a current of 2.7 dB(mA). Due to the current limit, the maximum voltage with a headphone impedance of 16.9 Ohm in pure mode will be -20.8 dBV.

FiiO X1 with EP1 will provide the best sound quality in the volume range from 78.3 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 11.7 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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FiiO X1 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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