Test report Astell & Kern iriver AK120

Test report - general data headphone amplifier Astell & Kern iriver AK120

Frequency response, Impedance and Frequency response with standard headphones

Graphics setting view

Range, dB:

90 50 24

General results
Astell & Kern iriver AK120

Channel

Left

Average variation in FR in the band 40 Hz to 15 kHz, dB

-0,15, 0,18

Average value of impedance band in 40 Hz to 15 kHz, ohm

4,6

Max voltage output

V_RMS

dBV

Maximum current output at loaded

ohm

mA

Max power output

ohm

mW

dBm

The table shows a most important technical characteristics of Astell & Kern iriver AK120

Calculate sound pressure level in headphones with online calculator with data entered from the table for Astell & Kern iriver AK120

Test conditions

• For record of test signals RAA was used ADC: E-MU 1616m
• During tests RAA software-hardware measuring complex was used galvanic isolated power transformer and was excluded the effect of ground loop in the spectra

Report earlier version
Version report: V1~V2

Reports and testing methodology is gradually updated. We try to generate the report in such a way that it would have been a single kind of report for all devices, convenient for direct comparison.

We constantly introduce new tests and improving the options for displaying graphs and parameters. It introduces different changes in reports. Because reports are generated automatically, the updates do not take much time.

In the development and implementation of new tests, new reports are more complete. To update some charts and tables may require additional time to process the raw data separately for each device.

Some devices require re-testing.

This model was tested for a long time and the report does not have the following graphs:

This model was tested for a long time and the report does not have the following graphs:

• Maximum voltage output level vs load
• Maximum current level output vs load
• Maximum power level output level vs load
• THD vs load vs output voltage
• Harmonic distortion spectrum vs amplitude vs loaded
• Spectrum of IMD SMPTE vs Level
• Spectrum of IMD CCIF vs Level
• Spectrum of Multitone Distortion vs Level vs Load
• Crosstalk
• Crosstalk Phase

The history of the development of the report:

CloseMore detailed

Version report: V1

• Frequency response
• Impedance
• Frequency response with loaded resistors
• Variation in frequency response dependence of load dynamic type headphones
• Frequency response vs load balance armature headphone type (one driver)
• Variation in frequency response vs load balance armature headphone type (one driver)

Version report: V2

• Maximum voltage output level vs load
• Maximum current level output vs load
• Maximum power level output level vs load

Version report: V3

• THD vs load vs output voltage
• Harmonic distortion spectrum vs amplitude vs loaded

Version report: V4

• Crosstalk
• Crosstalk Phase
• Spectrum of IMD SMPTE vs Level
• Spectrum of IMD CCIF vs Level
• Spectrum of Multitone Distortion vs Level vs Load





Report content

• Frequency response
• Impedance
• Frequency response with loaded resistors
• Frequency response vs load dynamic type headphones
• Variation in frequency response dependence of load dynamic type headphones
• Frequency response vs load balance armature headphone type (one driver)
• Variation in frequency response vs load balance armature headphone type (one driver)

Detailed measurements report of technical characteristics

Frequency response headphone amplifier Astell & Kern iriver AK120

Graphics setting view

Range, dB:

90 50 24

Impedance headphone amplifier Astell & Kern iriver AK120

Frequency response with loaded resistors from Astell & Kern iriver AK120

Graphics setting view

Range, dB:

90 50 24 12

Frequency response of amplifier headphone amplifier Astell & Kern iriver AK120
with resistive load

Channel

Left

Variation in frequency response in band 40 Hz to 15 kHz loaded 16 ohm, dB

0,28

Variation in frequency response in band 40 Hz to 15 kHz loaded 32 ohm, dB

0,16

Variation in frequency response in band 40 Hz to 15 kHz loaded 50 ohm, dB

0,11

Variation in frequency response in band 40 Hz to 15 kHz loaded 100 ohm, dB

0,06

Variation in frequency response in band 40 Hz to 15 kHz loaded 250 ohm, dB

0,02

Variation in frequency response in band 40 Hz to 15 kHz loaded 600 ohm, dB

0,01

Frequency response headphone amplifier Astell & Kern iriver AK120 loaded dynamic headphone type

Graphics setting view

Range, dB:

90 50 24 12

Frequency response of the headphone amplifier Astell & Kern iriver AK120
loaded dynamic headphone type

Channel

Left

Variation in frequency response in band 40 Hz to 15 kHz load the dynamic type, dB

0,56

Deviation of frequency response headphone amplifier Astell & Kern iriver AK120 loaded dynamic headphone type

Graphics setting view

Range, dB:

90 50 24 12

Frequency response of amplifier Astell & Kern iriver AK120
loaded dynamic headphone type

Channel

Left

Variation in frequency response in band 40 Hz to 15 kHz load the dynamic type, dB

0,47

Frequency response headphone amplifier Astell & Kern iriver AK120 loaded type balance armature headphone type

Graphics setting view

Range, dB:

90 50 24 12

Frequency response of amplifier Astell & Kern iriver AK120
loaded type balanced armature

Channel

Left

Variation in frequency response in band 40 Hz to 15 kHz loaded type balanced armature, dB

1,95

Deviation of frequency response headphone amplifier Astell & Kern iriver AK120 loaded type balance armature headphone type

Graphics setting view

Range, dB:

90 50 24 12

Frequency response of amplifier Astell & Kern iriver AK120
loaded type balanced armature

Channel

Left

Variation in frequency response in band 40 Hz to 15 kHz loaded type balanced armature, dB

2,02