Measurement's report(16) FiiO A1 test and graphs(17)

General data frequency response impedance(266) FiiO_A1 test report and technical review(375)

Devices categories(36)
FiiO A1

Channel(37)

Summary (Right + Left)(38)

Average variation in FR in the band(45) 40 Hz to (290) 15 kHz, dB(289)

-0,17, 0,03

Average value of impedance band in(294) 40 Hz to (290) 15 kHz, ohm(285)

0,1

Max voltage output (unloaded), V_RMS/dBV(295)

1,66/4,4

Maximum current output at loaded (301) 15,8 ohm, mA(302)

66,055

Maximum power level at (308) 15,8 ohm, mW/dBm(309)

45,2/16,6

The table shows a most important technical characteristics of (280) FiiO A1

*Center channel is received by data averaging between the left and right channels(279)

Calculate sound pressure level in headphones with(315) online calculator with data entered from the table(376) for(377) FiiO A1

Test conditions(24)

For record of test signals RAA was used ADC: E-MU 1616m(234)
The difference between maximum levels output unloaded (235) FiiO A1 and input level 0 dBFS E-MU1616m is(236) -13,36 dB (value level for left and right channels)(61)
The signal was played to the amplifier with DAC:(240) E-MU1616m

THD(1238)

The signal was tested with output:(241) Jack
Was exposed to the level of the signal:(242) Maximum level(72)
The bit size/format of the test signal:(243) PCM 24 bit(80)
During tests RAA software-hardware measuring complex was used galvanic isolated power transformer and was excluded the effect of ground loop in the spectra(247)

Report content(203)

Frequency response (22)
Crosstalk(204)
Impedance (23)
Maximum voltage output level vs load(156)
Maximum current level output vs load(161)
Maximum power level output level vs load(166)
THD vs load vs output voltage(167)
Frequency response with loaded resistors(138)
Frequency response vs load dynamic type headphones(210)
Variation in frequency response dependence of load dynamic type headphones(211)
Frequency response vs load balance armature headphone type (one driver)(212)
Variation in frequency response vs load balance armature headphone type (one driver)(213)
Harmonic distortion spectrum vs amplitude vs loaded(214)

Not loaded(124)
Loaded (125)15,8 ohm (126)
Loaded (125)24,5 ohm (126)
Loaded (125)30,5 ohm (126)
Loaded (125)62,4 ohm (126)
Loaded (125)100 ohm (126)
Loaded (125)198,9 ohm (126)
Loaded (125)300 ohm (126)
Loaded (125)763 ohm (126)

Spectrum of IMD SMPTE vs Level(132)

Not loaded(124)
Loaded (125)15,8 ohm (126)
Loaded (125)24,5 ohm (126)
Loaded (125)30,5 ohm (126)
Loaded (125)62,4 ohm (126)
Loaded (125)100 ohm (126)
Loaded (125)198,9 ohm (126)
Loaded (125)300 ohm (126)
Loaded (125)763 ohm (126)

Spectrum of IMD CCIF vs Level(134)

Not loaded(124)
Loaded (125)15,8 ohm (126)
Loaded (125)24,5 ohm (126)
Loaded (125)30,5 ohm (126)
Loaded (125)62,4 ohm (126)
Loaded (125)100 ohm (126)
Loaded (125)198,9 ohm (126)
Loaded (125)300 ohm (126)
Loaded (125)763 ohm (126)

Spectrum of Multitone Distortion vs Level vs Load(128)

Not loaded(124)
Loaded (125)15,8 ohm (126)
Loaded (125)24,5 ohm (126)
Loaded (125)30,5 ohm (126)
Loaded (125)62,4 ohm (126)
Loaded (125)100 ohm (126)
Loaded (125)198,9 ohm (126)
Loaded (125)300 ohm (126)
Loaded (125)763 ohm (126)

Spectrum of Noise Distortion vs Level vs Load(130)

Not loaded(124)
Loaded (125)15,8 ohm (126)
Loaded (125)24,5 ohm (126)
Loaded (125)30,5 ohm (126)
Loaded (125)62,4 ohm (126)
Loaded (125)100 ohm (126)
Loaded (125)198,9 ohm (126)
Loaded (125)300 ohm (126)
Loaded (125)763 ohm (126)

Frequency response(105) FiiO_A1 test report and technical review(375)

Frequency response (22) FiiO A1

Channel(37)

Left(39)

Right(40)

Variation in frequency response in band from(251) 100 Hz to (290) 10 kHz, dB(289)

-0,04, 0,01

-0,03, 0,01

Impedance(268) FiiO_A1 test report and technical review(375)

Impedance (23) FiiO A1

Channel(37)

Left(39)

Right(40)

Impedance average in band from(283) 40 Hz to (290) 15 kHz, ohm(285)

0,1

Resistance at(320) 500 Hz, ohm(321)

0,1

Resistance at(320) 1000 Hz, ohm(321)

0,1

0,0

The minimum value in band from(322) 40 Hz to (290) 15 kHz at frequency, Hz(324)

45,6

220,3

The minimum value in band from(322) 40 Hz to (290) 15 kHz, ohm(285)

0,1

0,0

The maximum value in band from(323) 40 Hz to (290) 15 kHz at frequency, Hz(324)

450,9

80,8

The maximum value in band from(323) 40 Hz to (290) 15 kHz, ohm(285)

0,1

FiiO_A1 test report and technical review(375)

Frequency response with loaded resistors(138) FiiO_A1 test report and technical review(375)

Frequency response of amplifier(368) headphone amplifier(249) FiiO A1
with resistive load(369)

Channel(37)

Summary (Right + Left)(38)

Variation in frequency response in band (278) 40 Hz to (290) 15 kHz loaded(370) 16 ohm, dB(349)

0,04

Variation in frequency response in band (278) 40 Hz to (290) 15 kHz loaded(370) 32 ohm, dB(349)

0,02

Variation in frequency response in band (278) 40 Hz to (290) 15 kHz loaded(370) 50 ohm, dB(349)

0,01

Variation in frequency response in band (278) 40 Hz to (290) 15 kHz loaded(370) 100 ohm, dB(349)

0,01

Variation in frequency response in band (278) 40 Hz to (290) 15 kHz loaded(370) 250 ohm, dB(349)

0,00

Variation in frequency response in band (278) 40 Hz to (290) 15 kHz loaded(370) 600 ohm, dB(349)

0,00

*Center channel is received by data averaging between the left and right channels(279)

Frequency response vs load dynamic type headphones(210) FiiO_A1 test report and technical review(375)

Frequency response of the headphone amplifier(371) FiiO A1
loaded dynamic headphone type(169)

Channel(37)

Summary (Right + Left)(38)

Variation in frequency response in band (278) 40 Hz to (290) 15 kHz load the dynamic type, dB(372)

0,24

*Center channel is received by data averaging between the left and right channels(279)

Variation in frequency response dependence of load dynamic type headphones(211) FiiO_A1 test report and technical review(375)

Frequency response of amplifier(368) FiiO A1
loaded dynamic headphone type(169)

Channel(37)

Summary (Right + Left)(38)

Variation in frequency response in band (278) 40 Hz to (290) 15 kHz load the dynamic type, dB(372)

0,01

*Center channel is received by data averaging between the left and right channels(279)

Frequency response vs load balance armature headphone type (one driver)(212) FiiO_A1 test report and technical review(375)

Frequency response of amplifier(368) FiiO A1
loaded type balanced armature(276)

Channel(37)

Summary (Right + Left)(38)

Variation in frequency response in band (278) 40 Hz to (290) 15 kHz loaded type balanced armature, dB(277)

0,28

*Center channel is received by data averaging between the left and right channels(279)

Variation in frequency response vs load balance armature headphone type (one driver)(213) FiiO_A1 test report and technical review(375)

Frequency response of amplifier(368) FiiO A1
loaded type balanced armature(276)

Channel(37)

Summary (Right + Left)(38)

Variation in frequency response in band (278) 40 Hz to (290) 15 kHz loaded type balanced armature, dB(277)

0,05

*Center channel is received by data averaging between the left and right channels(279)

Maximum voltage output level vs load(156) FiiO_A1 test report and technical review(375)

Maximum voltage output level vs load(156) FiiO A1 (the source data for the spectra(146))

Limit(148)

Pure(152)

Optimal(153)

Hard(154)

Level(149)

V_RMS(150)

dBV(151)

V_RMS(150)

dBV(151)

V_RMS(150)

dBV(151)

loaded(144) 16 ohm (126)

N/А

0,83

-1,63

1,04

0,37

loaded(144) 25 ohm (126)

N/А

1,05

0,39

1,17

1,39

loaded(144) 31 ohm (126)

N/А

1,17

1,39

1,32

2,39

loaded(144) 62 ohm (126)

N/А

1,32

2,41

1,48

3,41

loaded(144) 100 ohm (126)

N/А

1,32

2,41

1,66

4,41

loaded(144) 199 ohm (126)

N/А

1,48

3,41

1,66

4,41

loaded(144) 300 ohm (126)

N/А

1,48

3,41

1,66

4,41

loaded(144) 763 ohm (126)

N/А

1,66

4,42

1,66

4,42

Not loaded(124)

N/А

1,66

4,42

1,66

4,42

Calculate sound pressure level in headphones with(315) online calculator with data entered from the table(376) for(377) FiiO A1

Maximum current level output vs load(161) FiiO_A1 test report and technical review(375)

Maximum current level output vs load(161) FiiO A1 (the source data for the spectra(146))

Limit(148)

Pure(152)
mA(158)

Optimal(153)
mA(158)

Hard(154)
mA(158)

loaded(144) 16 ohm (126)

N/А

52,47

66,06

loaded(144) 25 ohm (126)

N/А

42,68

47,89

loaded(144) 31 ohm (126)

N/А

38,49

43,19

loaded(144) 62 ohm (126)

N/А

21,14

23,72

loaded(144) 100 ohm (126)

N/А

13,20

16,61

loaded(144) 199 ohm (126)

N/А

7,45

8,36

loaded(144) 300 ohm (126)

N/А

4,94

5,54

loaded(144) 763 ohm (126)

N/А

2,18

Not loaded(124)

N/А

0,03

Maximum power level output level vs load(166) FiiO_A1 test report and technical review(375)

Maximum power level output level vs load(166) FiiO A1 (the source data for the spectra(146))

Limit(148)

Pure(152)

Optimal(153)

Hard(154)

Level(149)

mW(163)

dBm(164)

mW(163)

dBm(164)

mW(163)

dBm(164)

loaded(144) 16 ohm (126)

N/А

43,50

16,38

68,94

18,38

loaded(144) 25 ohm (126)

N/А

44,63

16,50

56,19

17,50

loaded(144) 31 ohm (126)

N/А

45,20

16,55

56,89

17,55

loaded(144) 62 ohm (126)

N/А

27,90

14,46

35,12

15,45

loaded(144) 100 ohm (126)

N/А

17,42

12,41

27,60

14,41

loaded(144) 199 ohm (126)

N/А

11,04

10,43

13,89

11,43

loaded(144) 300 ohm (126)

N/А

7,32

8,64

9,21

9,64

loaded(144) 763 ohm (126)

N/А

3,62

5,59

3,62

5,59

Not loaded(124)

N/А

0,06

-12,57

0,06

-12,57

THD vs load vs output voltage(167) FiiO_A1 test report and technical review(375)

Test report(18) FiiO A1

Test report - general data(19) headphone amplifier(249) FiiO A1

Frequency response, Impedance and Frequency response with standard headphones(21)

Test conditions(24)

Report content(203)

Detailed measurements report of technical characteristics(15)

Frequency response (22) headphone amplifier(249) FiiO A1

Impedance (23) headphone amplifier(249) FiiO A1

Crosstalk(204) headphone amplifier(249) FiiO A1

Frequency response with loaded resistors(138) from (380) FiiO A1

Frequency response(105) headphone amplifier(249) FiiO A1 loaded dynamic headphone type(169)

Deviation of frequency response(110) headphone amplifier(249) FiiO A1 loaded dynamic headphone type(169)

Frequency response(105) headphone amplifier(249) FiiO A1 loaded type balance armature headphone type(170)

Deviation of frequency response(110) headphone amplifier(249) FiiO A1 loaded type balance armature headphone type(170)

Maximum voltage output level vs load(156) FiiO A1

Maximum current level output vs load(161) FiiO A1

Maximum power level output level vs load(166) FiiO A1

THD vs load vs output voltage(167) FiiO A1

Spectrum of Total Harmonic Distortion vs Level(123) headphone amplifier(249) FiiO A1

Not loaded(124)

Loaded (125)15,8 ohm (126)

Loaded (125)24,5 ohm (126)

Loaded (125)30,5 ohm (126)

Loaded (125)62,4 ohm (126)

Loaded (125)100 ohm (126)

Loaded (125)198,9 ohm (126)

Loaded (125)300 ohm (126)

Loaded (125)763 ohm (126)

Spectrum of IMD SMPTE vs Level(132) headphone amplifier(249) FiiO A1

Not loaded(124)

Loaded (125)15,8 ohm (126)

Loaded (125)24,5 ohm (126)

Loaded (125)30,5 ohm (126)

Loaded (125)62,4 ohm (126)

Loaded (125)100 ohm (126)

Loaded (125)198,9 ohm (126)

Loaded (125)300 ohm (126)

Loaded (125)763 ohm (126)

Spectrum of IMD CCIF vs Level(134) headphone amplifier(249) FiiO A1

Not loaded(124)

Loaded (125)15,8 ohm (126)

Loaded (125)24,5 ohm (126)

Loaded (125)30,5 ohm (126)

Loaded (125)62,4 ohm (126)

Loaded (125)100 ohm (126)

Loaded (125)198,9 ohm (126)

Loaded (125)300 ohm (126)

Loaded (125)763 ohm (126)

Spectrum of Multitone Distortion vs Level vs Load(128) headphone amplifier(249) FiiO A1

Not loaded(124)

Loaded (125)15,8 ohm (126)

Loaded (125)24,5 ohm (126)

Loaded (125)30,5 ohm (126)

Loaded (125)62,4 ohm (126)

Loaded (125)100 ohm (126)

Loaded (125)198,9 ohm (126)

Loaded (125)300 ohm (126)

Loaded (125)763 ohm (126)

Spectrum of Noise Distortion vs Level vs Load(130) headphone amplifier(249) FiiO A1

Not loaded(124)

Loaded (125)15,8 ohm (126)

Loaded (125)24,5 ohm (126)

Loaded (125)30,5 ohm (126)

Loaded (125)62,4 ohm (126)

Loaded (125)100 ohm (126)

Loaded (125)198,9 ohm (126)

Loaded (125)300 ohm (126)

Loaded (125)763 ohm (126)