Astell&Kern AK380 AMP 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)

The automatic selection of the optimal AMP models

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Review

Versus of characteristics

Information for professionals

reports for a pro(Headphone amplifier)

Unbalanced Norm

Comparison of on-line graphs

Astell&Kern AK380 AMP 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)

The automatic selection of the optimal AMP models

Information for all

Review

Versus of characteristics

Information for professionals

reports for a pro(Headphone amplifier)

Unbalanced Norm

Comparison of on-line graphs

Voltage and Sensitivity - Direct comparison of graphs

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 A / Maximum or before clipping level

Menu	Delete	Close	Color	Style	Name	Voltage, dBV/V_RMS	Current, dB(mA)/mA	Output Impedance, ohm

					Astell&Kern AK380 AMP Balanced Hi	14.78 / 5.48 15.78 / 6.15	21.16 / 11.43 35.31 / 58.25	1.50
					Astell&Kern AK380 AMP Balanced Norm	3.36 / 1.47 5.36 / 1.85	14.14 / 5.10 35.57 / 60.05	2.11
					Astell&Kern AK380 AMP Unbalanced Hi	8.79 / 2.75 9.79 / 3.09	19.20 / 9.12 32.63 / 42.80	0.65
					Astell&Kern AK380 AMP Unbalanced Norm	5.32 / 1.85 5.32 / 1.85	19.28 / 9.21 35.15 / 57.21	0.65

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

Menu	Delete	Close	Color	Style	Close	Sensitivity of voltage , dB/V SPL	Impedance , ohm

					Apple EarPods	118.0	42.2
					Dunu DN-2002	133.5	6.0
					Enigma Acoustics & Lotoo Dharma D200	125.0	30.2
					Sunrise Dragon Default	122.1	119.5
					Sunrise Feeling 2	123.8	18.2
					xDuoo EP1	131.8	16.9

Display headphones at specified limits

	Voltage, dBV	Current, dB(mA)	Output Impedance, ohm
РќРёР¶РЅСЏСЏ РіСЂР°РЅРёС†Р°
Lower limit

How to change the color of graphs?

Saving and switching to other services

Go to other services with the selected headphones from this service:

Compare sensitivities and impedances of headphones (All)
Compare sensitivities and impedances of headphones (Only visible headphones in the list)
Comparison of basic characteristics AMPs
Compare the frequency response of headphones (All)
Compare the frequency response of headphones (Only visible headphones in the list)
Comparison of the frequency response/SPL of the bundles of headphones and amplifiers (All) - Headphones + Astell&Kern AK380 AMP Balanced Hi
Comparison of the frequency response/SPL of the bundles of headphones and amplifiers (Only visible headphones in the list) - Headphones + Astell&Kern AK380 AMP Balanced Hi
Comparison of amplifiers by loudness (Volume Level)
Frequency response and SPL depending on the parameters of the amplifier (0 dBV, 30 ohm )
Comparison of the optimal range of volume control
Impulse, Envelope, Step responses and Square wave
Impedance (All)
Electric phase (All)
QSD / Watterfall (All)
Spectra (All)
Harmonic Distortion vs Level (All)
Harmonic Distortion vs Level (All | All Loads)
Harmonic Distortion vs Level (All | Harmonics separately (H2~H20))
Crosstalk (All)
Crosstalk (All | All Loads)
Crosstalk Phase (All)
Crosstalk Phase (All | All Loads)

Available only to registered users with Pro account

Save selected devices to the group (Only visible headphones in the list):

List and setting of Groups

Save to the new group:

Amplifiers and Headphones by parameters

Custom AMP

Delete	Close	Color	Style	Name	Voltage, dBV	Current, dB(mA)	Output Impedance, ohm

Headphones

Delete	Close	Color	Style	Name	Sensitivity of voltage , dB/V SPL	Impedance , ohm

Graph of Sensitivity

Delete	Close	Color	Style	Name	Sensitivity	Type

How to change the color of graphs?

Maximum level of the load

Loaded impedance headphones ohm

Marker:

Equivalent power class	Equiv. class A	Equiv. class AB	Equiv. class B	Max	No Current limit
	dBV V_RMS	dBV V_RMS	dBV V_RMS	dBV V_RMS	dBV V_RMS
Astell&Kern AK380 AMP Balanced Hi	-8.7 0.4	0.0 1.0	3.2 1.4	5.4 1.9	15.4 5.9
Astell&Kern AK380 AMP Balanced Norm	-15.8 0.2	-0.7 0.9	2.2 1.3	4.8 1.7	4.8 1.7
Astell&Kern AK380 AMP Unbalanced Hi	-10.7 0.3	-0.0 1.0	2.7 1.4	2.7 1.4	9.6 3.0
Astell&Kern AK380 AMP Unbalanced Norm	-10.6 0.3	-0.6 0.9	2.4 1.3	5.1 1.8	5.1 1.8

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 for every AMP.

Рекомендации совместимости наушников c усилителями на основе технических характеристик

Apple EarPods + Astell&Kern AK380 AMP Balanced Hi

With the measured characteristics of the Apple EarPods, the sensitivity of 118.0 dB/V_RMS and the impedance of 42.2 ohms, with the Astell&Kern AK380 AMP Balanced 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 -19.0 dBV and a current of 8.5 dB(mA).

Astell&Kern AK380 AMP Balanced Hi can provide voltages up to 14.5 dBV and up to a current of 21.2 dB(mA). Due to the current limit, the maximum voltage with a headphone impedance of 42.2 Ohm in pure mode will be -6.3 dBV.

Astell&Kern AK380 AMP Balanced Hi with EarPods will provide the best sound quality in the volume range from 88.4 to 102.6 dB SPL. Thus, relative the level of 90 dB SPL there is a margin of 12.6 dB above by the volume and 1.6 dB below.

Dunu DN-2002 + Astell&Kern AK380 AMP Balanced Hi

With the measured characteristics of the Dunu DN-2002, the sensitivity of 133.5 dB/V_RMS and the impedance of 6.0 ohms, with the Astell&Kern AK380 AMP Balanced 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 -34.5 dBV and a current of 10.0 dB(mA).

Astell&Kern AK380 AMP Balanced Hi can provide voltages up to 12.8 dBV and up to a current of 21.2 dB(mA). Due to the current limit, the maximum voltage with a headphone impedance of 6.0 Ohm in pure mode will be -23.3 dBV.

Astell&Kern AK380 AMP Balanced Hi with DN-2002 will provide the best sound quality in the volume range from 102.3 to 101.1 dB SPL.

Enigma Acoustics & Lotoo Dharma D200 + Astell&Kern AK380 AMP Balanced Hi

With the measured characteristics of the Enigma Acoustics & Lotoo Dharma D200, the sensitivity of 125.0 dB/V_RMS and the impedance of 30.2 ohms, with the Astell&Kern AK380 AMP Balanced 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 -26.0 dBV and a current of 4.4 dB(mA).

Astell&Kern AK380 AMP Balanced Hi can provide voltages up to 14.4 dBV and up to a current of 21.2 dB(mA). Due to the current limit, the maximum voltage with a headphone impedance of 30.2 Ohm in pure mode will be -9.2 dBV.

Astell&Kern AK380 AMP Balanced Hi with Dharma D200 will provide the best sound quality in the volume range from 95.4 to 106.8 dB SPL.

Sunrise Dragon Default + Astell&Kern AK380 AMP Balanced Hi

With the measured characteristics of the Sunrise Dragon Default, the sensitivity of 122.1 dB/V_RMS and the impedance of 119.5 ohms, with the Astell&Kern AK380 AMP Balanced 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 -23.1 dBV and a current of -4.7 dB(mA).

Astell&Kern AK380 AMP Balanced Hi can provide voltages up to 14.7 dBV and up to a current of 21.2 dB(mA). Due to the current limit, the maximum voltage with a headphone impedance of 119.5 Ohm in pure mode will be 2.7 dBV.

Astell&Kern AK380 AMP Balanced Hi with Dragon will provide the best sound quality in the volume range from 92.8 to 115.8 dB SPL.

Sunrise Feeling 2 + Astell&Kern AK380 AMP Balanced Hi

With the measured characteristics of the Sunrise Feeling 2, the sensitivity of 123.8 dB/V_RMS and the impedance of 18.2 ohms, with the Astell&Kern AK380 AMP Balanced 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 -24.8 dBV and a current of 10.0 dB(mA).

Astell&Kern AK380 AMP Balanced Hi can provide voltages up to 14.1 dBV and up to a current of 21.2 dB(mA). Due to the current limit, the maximum voltage with a headphone impedance of 18.2 Ohm in pure mode will be -13.6 dBV.

Astell&Kern AK380 AMP Balanced Hi with Feeling 2 will provide the best sound quality in the volume range from 93.9 to 101.1 dB SPL.

xDuoo EP1 + Astell&Kern AK380 AMP Balanced Hi

With the measured characteristics of the xDuoo EP1, the sensitivity of 131.8 dB/V_RMS and the impedance of 16.9 ohms, with the Astell&Kern AK380 AMP Balanced 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 -32.8 dBV and a current of 2.6 dB(mA).

Astell&Kern AK380 AMP Balanced Hi can provide voltages up to 14.0 dBV and up to a current of 21.2 dB(mA). Due to the current limit, the maximum voltage with a headphone impedance of 16.9 Ohm in pure mode will be -14.3 dBV.

Astell&Kern AK380 AMP Balanced Hi with EP1 will provide the best sound quality in the volume range from 101.8 to 108.5 dB SPL.

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 9 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.