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


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