Measurement's report Audiotrak Dr.Dac 2 OPA 627 - Reference Audio Analyzer

Reports / Audiotrak / Dr.Dac 2 / OPA 627 / A set of device tests as a headphone amplifier - report for a pro

Test report Audiotrak Dr.Dac 2: OPA 627 (report for a pro)

About this report
This is a report for professionals with a suite of test of headphone amplifier.
You can see a simple report for "dummies" with explanations of the main characteristics for Audiotrak Dr.Dac 2 OPA 627

A suite of tests for a headphone amplifier can be applied to just a universal output without a formal presence of an amplifier, if in this mode you can connect headphones to this output. Based on the results of the tests, you can understand the real picture, is the output powerful enough or not, with the initial data on the circuitry as a "black box".

Test report - general data Audiotrak Dr.Dac 2 (as headphone amplifier)

Frequency response, Impedance and Frequency response with standard headphones

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Voltage levels from the load at the output of the amplifier

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Average value of impedance band in 40 Hz - 15 kHz0.1ohm
Voltage:
Pure or equal class A / Maximum or before clipping level
17.6/17.6dBV
7.6/7.6VRMS
Current:
Pure or equal class A / Maximum or before clipping level
30.1/45.1dB(mA)
32.0/179.9mA






Frequency response Audiotrak Dr.Dac 2 OPA 627 (as headphone amplifier)

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Channel

Range

Channel:LeftRight
Variation in frequency response in band from 40 Hz - 15 kHz -0.1, +0.0-0.1, +0.0dB


Brief information

Clicking on the graph will take you to the comparison page of different headphone models with advanced graph display settings.



Impedance Audiotrak Dr.Dac 2 OPA 627 (as headphone amplifier)

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Channel

Channel:LeftRight
Impedance average in band from 40 Hz - 15 kHz0.1 0.1ohm
The minimum value in band from 40 Hz - 15 kHz0.1 0.1ohm
The maximum value in band from 40 Hz - 15 kHz0.1 0.1ohm


Comparison of basic characteristics AMPs

Brief information

Clicking on the graph will take you to the comparison page of different headphone models with advanced graph display settings.



Crosstalk Audiotrak Dr.Dac 2 OPA 627 (as headphone amplifier)

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Channel

Range

Load

Channel:LeftRight
Crosstalk @ 1 kHz @ 15.8 ohm -58.4 -58.3dB
Crosstalk @ 1 kHz @ 24.5 ohm -60.1 -60.0dB
Crosstalk @ 1 kHz @ 62.4 ohm -79.6 -78.5dB
Crosstalk @ 1 kHz @ 100.0 ohm -86.8 -85.2dB
Crosstalk @ 1 kHz @ 198.9 ohm -86.0 -89.2dB
Crosstalk @ 1 kHz @ 300.0 ohm -82.1 -83.6dB
Crosstalk @ 1 kHz @ 763.0 ohm -79.4 -80.8dB
Crosstalk @ 1 kHz @ Not loaded-78.1 -79.1dB


Brief information

Clicking on the graph will take you to the comparison page of different headphone models with advanced graph display settings.



Frequency response Audiotrak Dr.Dac 2 OPA 627 with resistive load

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Channel

Range

Frequency response of amplifier with resistive load @ 40 Hz - 15 kHz
Channel:LeftRight
HP 16 Ω + Audiotrak Dr.Dac 2 OPA 627 0.00.0dB
HP 32 Ω + Audiotrak Dr.Dac 2 OPA 627 0.00.0dB
HP 64 Ω + Audiotrak Dr.Dac 2 OPA 627 0.00.0dB
HP 126 Ω + Audiotrak Dr.Dac 2 OPA 627 0.00.0dB
HP 256 Ω + Audiotrak Dr.Dac 2 OPA 627 0.00.0dB
HP 512 Ω + Audiotrak Dr.Dac 2 OPA 627 0.00.0dB


Brief information

Clicking on the graph will take you to the comparison page of different headphone models with advanced graph display settings.



Frequency response Audiotrak Dr.Dac 2 OPA 627 loaded dynamic headphone type

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Channel

Range

Frequency response of amplifier loaded dynamic headphone type @ 40 Hz - 15 kHz
Channel:LeftRight
HP 10000 Ω + Audiotrak Dr.Dac 2 OPA 627 0.00.0dB
Grado GH4 Limited Edition + Audiotrak Dr.Dac 2 OPA 627 0.00.0dB


Brief information

Clicking on the graph will take you to the comparison page of different headphone models with advanced graph display settings.



Frequency response Audiotrak Dr.Dac 2 OPA 627 loaded type balance armature headphone type

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Channel

Range

Frequency response of amplifier loaded type balance armature headphone type @ 40 Hz - 15 kHz
Channel:LeftRight
HP 10000 Ω + Audiotrak Dr.Dac 2 OPA 627 0.00.0dB
Campfire Audio Andromeda + Audiotrak Dr.Dac 2 OPA 627 0.10.1dB
Fearless Audio S8F Freedom + Audiotrak Dr.Dac 2 OPA 627 0.10.1dB


Brief information

Clicking on the graph will take you to the comparison page of different headphone models with advanced graph display settings.



THD vs load vs output voltage Audiotrak Dr.Dac 2 OPA 627

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Channel

Load

Harmonic, number

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Channel

Load

Harmonic, number

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Channel

Load

Brief information

Clicking on the graph will take you to the comparison page of different headphone models with advanced graph display settings.



Maximum voltage output level vs load Audiotrak Dr.Dac 2 OPA 627

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RAW coordinates

Power characteristics of the Voltage Current
dBVVRMSdB(mA)mA
Equivalent class A 17.67.630.132.0
Equivalent class AB 17.67.645.1179.9
Equivalent class B 17.67.645.1179.9
Maximum mode 17.67.645.1179.9


Volume Control TypeAnalog
Optimal range of volume control36.0dB


Comparison Audiotrak Dr.Dac 2 OPA 627 and another amplifiers by loudness (Volume Level)

Main characteristics of the Audiotrak Dr.Dac 2 OPA 627

Brief information

Clicking on the graph will take you to the comparison page of different headphone models with advanced graph display settings.



Maximum voltage output level vs load Audiotrak Dr.Dac 2 OPA 627

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Maximum Amplifier Voltage Level
Load Pure or equal class AOptimal or equal class ABHard or equal class BMax, before clipping
dBVVRMSdBVVRMSdBVVRMSdBVVRMS



Maximum level of amplifier current
Load Pure or equal class AOptimal or equal class ABHard or equal class BMax, before clipping
dB(mA)mAdB(mA)mAdB(mA)mAdB(mA)mA


Power
Load Pure or equal class AOptimal or equal class ABHard or equal class BMax, before clipping
dBmmWdBmmWdBmmWdBmmW



Clicking on the graph will take you to the comparison page of different headphone models with advanced graph display settings.

Brief information


   

Spectrum of Total Harmonic Distortion vs Level Audiotrak Dr.Dac 2 OPA 627 (as headphone amplifier)

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