Reference Audio Analyzer

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(Headphone amplifier)

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Comparison of volume gain AMPs


Why is the "volume" expressed in dBV
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, you can see that at the same volume values in dBV, the power values in mW will be different.


What and how to compare with the characteristics provided by manufacturers
The value of the high quality mode power is equivalent to class A. Typically, manufacturers for this power indicate the percentage of distortion, which should be no more than 1%.

Simply the Maximum power, this is the power level above, which the amplifier is already "wheezing" or the volume control is already at its maximum level. Usually indicated without a percentage of distortion, because high quality for this volume level is not implied.

Определить напряжение в dBV по данным производителей можно в специальном калькуляторе (в разработке)


Выходная мощность и сопротивление наушников
Так как мощность зависит от тока, напряжения и сопротивления усилителя, то для разных сопротивлений наушников будут лидировать разные усилители. По умолчанию предлагаются сопротивления 32 и 300 Ом. Можно задать любые другие значения.


Самый громкий - самый лучший?
Если выбрать излишне громкий усилитель, то можно столкнуться с проблемами фонового шума и/или несовершенства регулятора громкости. Усилитель стоит подбирать под чувствительность используемых наушников.



О взаимосвязи режимов и громкости





Compare for: Clear or equal class AF.A.Q. Mod


32 ohm 300 ohm
Name dBV mW dBV mW
Violectric HPA V281 Balance 20.6224.6730.92106.30
Violectric HPA V90 23.4428.3725.91288.75
Violectric HPA V281 Unbalance 24.41309.6324.5929.35
OPPO HA-1 Balance 24.4902.9224.4928.68
Violectric HPA V200 24.41125.8624.4923.82
Violectric HPA V220 21.81116.3921.8508.49
Audiotrak Dr.Dac 2 OPA 627 12.232.7517.6193.52
MyST DAC 1866OCU V.2 16.81502.4217.5189.56
DIY HeadAMP lakkarius 16.81499.3317.3180.10
Musatoff HA-5SE 14.251.3317.3178.47
Aune X1s 6.38.3916.878.62
OPPO HA-1 Unbalance 16.6362.6516.7155.12
FiiO K5 Hi -2.31.1716.210.96
Walnut V3 Balance 3.14.0716.138.16
Grado RA-1 -3.10.9716.09.07
ASUS Essence One MK2 13.7107.8815.9129.68
Aune T1 Max 9.718.4715.8126.09
Erzetich Bacillus Tilia 8.215.5515.6120.13
Audiotrak Prodigy 7.1 On 2.53.4715.532.55
ASUS Essence One Mod V 10.220.4515.2110.16
ASUS ROG Xonar Phoebus 12.977.3315.1106.64
ASUS STRIX RAID DLX Hi 12.3206.4915.0106.37
ASUS Xonar Essence STX Hi 12.958.0415.0106.03
Musatoff HA-4 12.938.7414.799.50
Astell&Kern AK380 AMP Balanced Hi 3.34.1814.739.22
Creative Sound Blaster X7 LE Hi 14.4335.0814.696.96
Creative Sound BlasterX AE-5 HP Out 14.2193.0414.492.40
Erzetich Perfidus 5.9115.6514.286.77
FiiO X5-III Balanced Turbo 13.5135.6414.083.90
Astell&Kern KANN Balanced 0.82.3613.822.12
DIY Monster Zen 13.3661.6313.778.23
Weiliang Audio U9 8.814.9213.676.54
ASUS Essence 3 Unbalance 11.243.0513.473.41
xDuoo TA-01 1.12.5313.223.72
Chord Hugo 7.611.2813.167.29
ASUS STRIX RAID PRO Hi 3.265.2312.965.73
FiiO X7 II Balanced 12.537.8012.965.65
DIY Beta 22 12.6566.2212.661.00
Cary Audio HH-1 10.468.4812.660.52
iBasso DX150 AMP6 Balanced 12.3301.4812.458.30
FiiO K5 Mid 12.475.6812.457.95
Aune B1s Class A- Gain Hi 2.63.6212.433.96
SMSL sAp II 10.3268.4212.457.68
Chord Mojo 0.01.9812.318.55
Aune B1s Class A+ Gain Hi 9.316.9412.255.25
HiFiMan HM-801 SM SYMMcard 7.2 11.3420.1311.850.93
Onkyo Granbeat DP-CMX1 Balanced -3.60.8611.78.04
xDuoo XD-05 Sanmigel Mod 2.13.2211.630.15
Pioneer XDP-300R Balance 0.82.3811.622.33
Sabaj D4 3.54.4511.341.75
SMSL sAp VI 0.12.0411.319.08
ASUS Essence 3 Balanced 4.534.6511.243.96
Chord Hugo TT 11.1250.8911.143.38
ASUS Impresario SBW-S1 PRO Xonar -1.621.5111.042.38
xDuoo X20 Balance 10.0203.8110.335.48
E-MU 1616m 1.62.8610.226.78
Creative SoundBlasterX G6 Hi -7.40.3610.03.37
Audiolab M-DAC 5.26.579.932.41
FiiO X7 AM2 9.517.779.731.26
xDuoo TA-02 4.25.229.529.72
iBasso DX100 -10.00.209.51.87
Xuelin iHiFi 812 V2 7.2163.299.328.48
FiiO X5 9.163.799.227.53
ASUS STRIX RAID DLX Mid 7.0102.849.127.38
xDuoo XD-05 Default -5.80.518.84.81
Astell&Kern AK380 AMP Unbalanced Hi 1.32.668.824.94
FiiO X5-III Balance 8.2178.308.724.72
xDuoo x10 Hi 8.415.628.423.04
MyST PortaDAC 1866OCUB v.3 6.3133.828.423.01
Shanling M3s Balance 8.1125.248.222.16
iBasso D14 Bushmaster 8.218.398.222.11
Creative SoundBlasterX G6 External power -5.80.528.24.89
Walnut V3 Unbalance -7.10.398.13.64
Sabaj PHA1 Jack 6.3 4.25.228.021.12
Oriolus DP100 Unbalance 7.9194.118.020.83
AuGlamour GR-1 6.28.297.920.70
Astell&Kern KANN Unbalanced 2.03.137.920.66
Oriolus DP100 Balance 7.526.617.920.65
OPPO HA-2 7.231.207.518.80
iBasso DX80 6.48.637.418.42
iBasso DX150 AMP6 Unbalanced 7.3126.767.418.37
theBit OPUS 2 Balance -6.30.467.44.29
Astell&Kern AK240 Balanced -8.00.317.22.92
Monster Audio MA-9 Alexmod Edition 6.9153.347.016.63
FiiO X7 II Unbalanced 6.6144.286.916.51
Lotoo Paw Gold 3.94.886.916.39
HiFiMan HM 802 MiniBox 3.24.106.816.10
HiFiMan HM-801 Power Amp OCL-A 819-10571 (10 Ohm) -9.20.246.72.22
FiiO X5 II Hi -8.80.266.72.44
theBit OPUS 2 Unbalance -1.91.286.612.02
Astell&Kern AK320 Balanced -9.20.246.62.23
FiiO X3 III Unbalanced Hi 6.3134.286.615.13
Cayin N3 -11.80.136.41.22
Laconic Lunch BOX HA-06 PRO Low -5.83.736.314.26
Creative Sound BlasterX AE-5 Line Out 5.814.006.314.22
LG G7 Hi-Fi Quad DAC On, Hi impedance headphone connected (60-300 ohm) -9.20.246.12.23
Hidizs AP100 3.84.766.013.27
Pro-Ject Pre Box S2 Digital -3.10.965.99.01
Onkyo Granbeat DP-CMX1 Unbalance -3.40.915.88.50
Creative SoundBlaster Zx -4.20.765.77.09
Creative Sound Blaster E5 5.2102.595.712.44
Pioneer XDP-300R Unbalance 0.82.355.712.44
Astell&Kern AK320 Unbalanced 0.12.035.712.37
Astell&Kern AK300 Unbalanced 0.22.045.712.35
Aune B1s Class A+ Gain Low 5.217.745.411.66
Sabaj HPA1 Jack 3.5 -6.16.065.411.64
Astell&Kern AK240 Unbalanced -0.91.625.411.59
Shanling M5 -14.10.085.40.72
Astell&Kern AK380 AMP Unbalanced Norm 1.42.715.311.31
Shanling M3s Unbalance 5.2102.345.211.06
FiiO K5 Low 5.1100.925.110.81
Shanling M2s 4.154.855.110.80
FiiO X7 AM1 5.1100.295.110.78
SMSL M3 -12.10.125.11.14
FiiO X7 AM2 OLD FW 1.02.464.79.93
Shanling M2 3.639.864.79.88
Inakustik Premium Headphone Amp. No. 1 Out 1 -8.00.314.62.94
Questyle QP1R H-Gain 4.46.844.49.25
xDuoo x10 Low 4.341.834.49.11
xDuoo X20 Unbalance 4.383.904.39.01
Inakustik Premium Headphone Amp. No. 1 Out 2 -8.10.304.32.83
HiFiMan HM 802 Balanced Card Balanced Mode 1.86.264.18.65
FiiO X3 II Hi 0.42.164.08.35
Xuelin iHiFi 960 Pro 1.847.594.08.31
GoVibe Porta Tube+ Mod C4 Op-Amp 3.976.333.98.16
FiiO X5-III Unbalance 3.570.603.87.96
ASUS STRIX RAID DLX Low 1.645.063.77.88
FiiO X1 MK2 -7.60.343.53.23
Denon DA-10 Hi -7.50.353.43.28
Aune T1 Low 1.230.843.37.16
Astell&Kern AK380 AMP Balanced Norm -3.80.833.37.12
Flang V5 Hi -9.00.253.32.35
xDuoo D3 nano -5.20.603.05.64
HiFiMan HM 802 Gandi -3.80.812.96.53
Tecsun HD-80 -9.00.252.92.34
Astell&Kern AK70 Unbalanced -4.30.732.86.37
Astell&Kern AK300 Balanced -7.90.322.63.01
FiiO Alpen E17 2.448.262.55.88
FiiO X1 -15.20.062.40.55
Kennerton Ego 0.65.182.45.73
QLS QA350 -15.00.062.30.58
SMSL ivy -3.50.882.35.65
SMSL sAp-9 Unbalance -2.318.472.15.37
Cayin N6 2.012.412.05.33
Creative SoundBlasterX G6 Low -12.10.121.81.15
Audiotrak Prodigy 7.1 Off -5.20.721.74.94
HiFiMan HM-603 Slim -17.90.031.60.30
HiFiMan HM-801 Power Amp Board V2.0 -10.80.171.61.55
ASUS STRIX RAID PRO Low -8.24.731.64.77
Cayin i5 -2.11.221.54.74
Luxury & Precision L3 Pro Unbalance DSD 0.938.831.54.69
FiiO X3 III Unbalanced Low 1.241.631.54.69
HiFiMan HM 802 Balanced Card Normal Mode 1.411.321.44.63
Luxury & Precision L3 Pro Balanced DSD 0.411.491.44.62
Luxury & Precision L3 DSD 0.84.131.44.55
xDuoo X3 Rockbox 1.039.721.14.26
DIY 6N2-FU32 Out 1 0.232.861.14.26
Colorful Colorfly C4 Pro Jack 6.3 0.636.180.94.12
Lenovo G770 -2.48.420.83.97
Astell&Kern AK70 Balanced -5.00.630.63.86
Creative X-Fi Xtreme Gamer Fatal1ty Professional Series Creation Mode 44 kHz -4.92.010.63.81
FiiO X3 II Low 0.32.450.43.66
LG G7 Hi-Fi Quad DAC On, without impedance headphone connected -3.10.970.43.63
FiiO X5 II Low -10.20.190.21.78
ASUS ZenFone Max Pro (M1) Poweramp 384 -14.10.080.20.71
Apple iPhone 5 -18.10.030.10.29
Apple A1749 Lightning Audio Adapter (iPhone 5s) -3.20.950.03.33
FiiO E10K Olympus 2 Hi Bass On -17.90.030.00.30
Schiit Fulla 813 Hz THD -17.90.030.00.30
SMSL sAp-9 Balance -17.90.030.00.30
SMSL sAp-9 Balance-in -17.90.030.00.30
E-MU 1616m Ref B6 -17.90.030.00.30
E-MU 1616m Ref -17.90.030.00.30
Questyle QP1R M-Gain -17.90.030.00.30
Questyle QP1R L-Gain -17.90.030.00.30
ASUS Xonar Essence STX Mid -17.90.030.00.30
ASUS Xonar Essence STX Low -17.90.030.00.30
Creative Sound Blaster X7 LE Low -17.90.030.00.30
Creative Sound Blaster X7 LE 8 Ohm -17.90.030.00.30
Creative Sound Blaster X7 LE 4 Ohm -17.90.030.00.30
Creative Sound Blaster X7 LE 4 Ohm Low -17.90.030.00.30
Laconic Lunch BOX HA-06 PRO Hi -17.90.030.00.30
Auzentech Auzen X-Fi Bravura 7.1 -17.90.030.00.30
HiFiMan HM-601 Low Gain -17.90.030.00.30
HiFiMan HM-601 Slim Low -17.90.030.00.30
FiiO X3 Low -17.90.030.00.30
Creative SoundBlaster ZxR Middle -17.90.030.00.30
ASUS Essence STU HP1 -17.90.030.00.30
Sony Ericsson W995 FP -17.90.030.00.30
Laconic Lunch BOX HA-06 SE Low -17.90.030.00.30
Laconic Lunch BOX HA-06 Low -17.90.030.00.30
Laconic Night Blues Mini Low Out -17.90.030.00.30
Laconic Night Blues NB-3A Low -17.90.030.00.30
Lehmann Audio Black Cube Linear USB Out 2 -17.90.030.00.30
Pro-Ject Head Box SE II Out 2 -17.90.030.00.30
Vincent KHV-111 -17.90.030.00.30
Technics SE-A5 HP Out -17.90.030.00.30
REGA EAR -17.90.030.00.30
Pro-Ject Head Box SE II Out 1 -17.90.030.00.30
Pro-Ject Head Box II -17.90.030.00.30
Ortofon HD-Q7 -17.90.030.00.30
Musica HPA 40 -17.90.030.00.30
MS Audio Laboratory FHA 1.2 -17.90.030.00.30
Meier Audio CORDA XXS -17.90.030.00.30
Meier Audio Corda Swing -17.90.030.00.30
Meier Audio Corda Concerto -17.90.030.00.30
Meier Audio 3MOVE -17.90.030.00.30
Lehmann Audio Linear LS -17.90.030.00.30
Lehmann Audio Black Cube Linear USB Out 1 -17.90.030.00.30
Laconic Night Blues NB-3A Hi -17.90.030.00.30
Laconic Night Blues Mini Hi Out -17.90.030.00.30
Laconic LunchBox H-Amp -17.90.030.00.30
Laconic Lunch BOX HA-06 Hi -17.90.030.00.30
Laconic Lunch BOX HA-06 SE Hi -17.90.030.00.30
Laconic HA-08 ZanaDeux Micro -17.90.030.00.30
iBasso T3 -17.90.030.00.30
iBasso PB1 Toucan -17.90.030.00.30
iBasso D2+ Boa -17.90.030.00.30
iBasso D12 Anaconda -17.90.030.00.30
HiFiMan EF6 -17.90.030.00.30
FLUX LAB HA-04 -17.90.030.00.30
Firestone Audio Cute Beyond -17.90.030.00.30
Arkhipovs Laboratory Melo -17.90.030.00.30
Arkhipovs Laboratory Alternative II -17.90.030.00.30
Sony NZW-E444 -17.90.030.00.30
Sony NWZ-ZX1 HP Out -17.90.030.00.30
Sony NWZ-F806 -17.90.030.00.30
Sony Ericsson W995 3,5 -17.90.030.00.30
Samsung GT-S5620 -17.90.030.00.30
Ritmix RF-9500 -17.90.030.00.30
Ritmix RF-9300 -17.90.030.00.30
QLS QA350 V2 -17.90.030.00.30
OPPO Find 5 -17.90.030.00.30
OPPO Clover R815 -17.90.030.00.30
Astell&Kern AK120 -17.90.030.00.30
Astell&Kern AK100 -17.90.030.00.30
iBasso DX50 -17.90.030.00.30
HiFiMan HM 901 IEM Card -17.90.030.00.30
HiFiMan HM-801 GameCard -17.90.030.00.30
HiFiMan HM-801 Balanced Card -17.90.030.00.30
HiFiMan HM-801 Power Amp OCL-A 819-10571 (40 Ohm) -17.90.030.00.30
HiFiMan HM-601 Hi Gain -17.90.030.00.30
HiFiMan HM-601 Slim Hi -17.90.030.00.30
FiiO X3 Hi -17.90.030.00.30
ESI Record M -17.90.030.00.30
Cowon X7 -17.90.030.00.30
Cowon V5 HD -17.90.030.00.30
Cowon S9 -17.90.030.00.30
Cowon J3 -17.90.030.00.30
Cowon D3 -17.90.030.00.30
Cowon D2+ -17.90.030.00.30
Cowon C2 -17.90.030.00.30
Colorful Colorfly C3 -17.90.030.00.30
Teac UD-H01 -17.90.030.00.30
Nu Force uDAC-2 -17.90.030.00.30
Native Instruments Audio 2 DJ -17.90.030.00.30
M-Audio ProFire 610 -17.90.030.00.30
Infrasonic Amon -17.90.030.00.30
iBasso D4 Mamba -17.90.030.00.30
ESI U24XL -17.90.030.00.30
ESI Dr.DAC prime -17.90.030.00.30
E-MU 0404 USB -17.90.030.00.30
E-MU 0204 USB -17.90.030.00.30
E-MU 0202 USB -17.90.030.00.30
Creative SoundBlaster ZxR Max -17.90.030.00.30
Creative SoundBlaster Z -17.90.030.00.30
Creative Sound Blaster Omni Surround 5.1 -17.90.030.00.30
Creative Audigy 5 -17.90.030.00.30
ASUS Xonar Essence ST -17.90.030.00.30
ASUS Xonar D2X -17.90.030.00.30
ASUS Xonar U7 -17.90.030.00.30
ASUS Essence STU HP2 -17.90.030.00.30
ASUS Essence One -17.90.030.00.30
Violectric HPA V100 -19.50.02-0.00.21
Xiaomi Mi A1 Neutron -8.50.28-0.12.64
xDuoo XQ-10 -0.91.58-0.43.07
Flang V5 Low -11.50.14-0.51.32
iBasso D-Zero -14.80.07-1.00.62
Shanling M1 -11.60.14-1.11.27
Xuelin iHiFi 770C Default -17.20.04-1.40.35
FiiO X3 III Balanced Low -1.721.37-1.42.41
Apple iPad mini -21.50.01-2.10.13
ASUS K50IJ -8.11.32-2.12.04
LG G7 Hi-Fi Quad DAC Off, without impedance headphone connected -2.64.23-2.22.00
xDuoo X3 Default -2.318.41-2.31.98
Xiaomi Redmi Note 4 -5.68.61-2.41.93
iBasso DX200 AMP1 Balanced -2.716.84-2.51.87
iBasso DX200 AMP1 Unbalanced -2.617.02-2.51.86
Breeze Audio USB DAC-PD01 -18.00.03-2.60.29
ONN X6 -21.70.01-2.80.12
Creative Audigy Fx -10.40.18-2.91.70
Nexum AQUA -11.60.14-3.01.29
Xuelin iHiFi 770C Bright -19.70.02-3.40.20
FiiO X3 III Balanced Hi -3.613.50-3.41.52
DIY 6N2-FU32 Out 2 -4.311.66-3.51.50
Musiland Monitor 03 US -3.912.75-3.81.39
Apple iPhone 5S -4.40.88-3.91.37
Colorful Colorfly C4 Pro Jack 3.5 -4.810.41-4.51.19
Luxury & Precision L3 Balance DSD -5.86.55-4.71.14
Xiaomi Redmi Note 4X PowerAmp -8.70.26-4.81.11
LG G7 Hi-Fi Quad DAC Off, Hi impedance headphone connected (60-750 ohm) -5.53.87-5.21.02
Benjie K9 -11.50.14-5.50.93
xDuoo X2 -5.66.59-5.60.93
Colorful Colorfly CK4 -11.20.15-5.70.90
Benjie X1 -9.00.25-6.10.82
LG 24MP76 -8.71.56-6.60.73
Lotoo PAW Pico -14.80.06-7.10.61
Xuelin iHiFi 770 Out 2 -23.40.01-8.00.08
MUSE AUDIO TU-10 -9.20.67-8.00.53
Xuelin iHiFi 770 Out 1 -23.60.01-8.30.08
LG G7 Hi-Fi Quad DAC On, Low impedance headphone connected (16-30 ohm) -8.91.02-8.70.45
Xuelin iHiFi 780 Out 2 -21.80.01-8.80.12
Xuelin iHiFi 800 -19.20.02-8.90.22
Xuelin iHiFi 780 Out 1 -18.70.03-9.10.25
LG G7 Hi-Fi Quad DAC Off, Low impedance headphone connected (16-30 ohm) -9.70.42-9.30.39
Nu Force uDAC -16.50.04-9.40.38
Benjie S5 -15.20.06-9.90.34
FiiO Fujiyama E06 -10.00.26-10.00.34
ASUS ZenFone Max Pro (M1) Neutron -13.70.08-10.70.28
Schiit Fulla AMP -11.40.48-11.40.24
Xuelin iHiFi 100 -13.61.36-11.40.24
Gigabyte GA-A75-UD4H Realtek ALC889A -25.90.08-11.60.23
Acer Iconia Tab W500 -18.50.44-11.90.21
Sansa Clip+ -28.80.00-12.00.02
CEntrance Mini-M8 -12.60.23-12.50.19
Beyerdynamic IMPACTO essential -12.80.41-12.70.18
HiFiMan HM-700 Balance -32.30.00-12.80.01
Lenovo s820 -14.01.25-13.40.15
FiiO A1 -23.00.01-13.60.09
IBM ThinkPad X31 -33.30.00-13.90.01
Fly FS504 Cirrus 2 PowerAmp (A5 v703) -27.10.04-16.10.08
FiiO uBTR -36.10.00-16.60.00
iBasso D10 Cobra -18.00.49-17.80.06
FiiO E10K Olympus 2 Hi Bass Off -22.80.17-22.50.02
FiiO E10K Olympus 2 Low Bass Off -29.60.03-29.30.00
New Bee NB-1 -60.70.00-60.00.00
Xiaomi Mi A1 VLC OpenSL ES -84.50.00-84.20.00
Xiaomi Redmi Note 4X Android 6 24 bit -89.10.00-88.90.00
Xiaomi Redmi Note 4X VLC OpenES -90.40.00-90.20.00
LeEco Cool changer s1 -96.90.00-95.50.00






Luxury & Precision L3 is available in reports and services. You are on the page of comparison volume level of AMPs.

Service and suite of tests

Information for entry level users

report for a newbie
(Headphone amplifier)

General recommendations

The automatic selection of the optimal AMP models

Information for all

Comparison of on-line graphs




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