Measurement's report DIY SM - Reference Audio Analyzer

DIY SM

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 DIY SM

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".

Line-out, differences from the output for headphones and speakers

Advantages and disadvantages of balanced amplifiers

Test report - general data DIY SM (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:
Linear Mode / Maximum or before clipping level
23.2/23.2dBV
14.5/14.5VRMS
Current:
Linear Mode / Maximum or before clipping level
59.2/59.2dB(mA)
908.6/908.6mA





Brief information

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





Frequency response DIY SM (as headphone amplifier)

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Graphics setting view
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 models with advanced graph display settings.

On the frequency response comparison page, there is an export option and additional tools for adjusting the frequency response



Impedance DIY SM (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 kHz0.2 0.2ohm


Comparison of basic characteristics AMPs


Brief information

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



Crosstalk DIY SM (as headphone amplifier)

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Channel

Range

Load

Channel:LeftRight
Crosstalk @ 1 kHz @ 15.8 ohm -102.5 -103.6dB
Crosstalk @ 1 kHz @ 24.5 ohm -99.9 -96.3dB
Crosstalk @ 1 kHz @ 30.5 ohm -105.7 -98.9dB
Crosstalk @ 1 kHz @ 62.4 ohm -104.0 -98.9dB
Crosstalk @ 1 kHz @ 100.0 ohm -104.9 -97.6dB
Crosstalk @ 1 kHz @ 198.9 ohm -106.1 -104.0dB
Crosstalk @ 1 kHz @ 300.0 ohm -106.0 -99.0dB
Crosstalk @ 1 kHz @ 763.0 ohm -107.8 -101.5dB
Crosstalk @ 1 kHz @ Not loaded-102.0 -101.2dB



Brief information

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



Crosstalk Phase DIY SM (as headphone amplifier)

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Graphics setting view
Channel

Load




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



Frequency response DIY SM with resistive load

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Channel

Range

Frequency response of amplifier with resistive load @ 40 Hz - 15 kHz
Channel:LeftRight
TEST 16 ? + DIY SM 0.00.0dB
TEST 32 ? + DIY SM 0.00.0dB
TEST 64 ? + DIY SM 0.00.0dB
TEST 126 ? + DIY SM 0.00.0dB
TEST 256 ? + DIY SM 0.00.0dB
TEST 512 ? + DIY SM 0.00.0dB



Brief information

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

On the frequency response comparison page, there is an export option and additional tools for adjusting the frequency response



Frequency response DIY SM loaded dynamic headphone type

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Channel

Range

Frequency response of amplifier loaded dynamic headphone type @ 40 Hz - 15 kHz
Channel:LeftRight
TEST 10000 ? + DIY SM 0.00.0dB
Grado GH4 Limited Edition + DIY SM 0.00.0dB



Brief information

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

On the frequency response comparison page, there is an export option and additional tools for adjusting the frequency response



Frequency response DIY SM 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
TEST 10000 ? + DIY SM 0.00.0dB
Campfire Audio Andromeda + DIY SM 0.30.3dB
Fearless Audio S8F Freedom + DIY SM 0.20.2dB



Brief information

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

On the frequency response comparison page, there is an export option and additional tools for adjusting the frequency response



THD vs load vs output voltage DIY SM

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Channel

Load

Harmonic, number

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Channel

Load

Harmonic, number

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Channel

Load


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Spectrum of Total Harmonic Distortion vs Level DIY SM (as headphone amplifier)

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Channel

Level

Range

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Channel

Level

Range

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Channel

Shift

dBm

Range

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Channel

Shift

dBV

Range




Brief information

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



   

Spectrum of Multitone Distortion vs Level vs Load DIY SM (as headphone amplifier)

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Channel

Level

Range

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Channel

Level

Range

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Channel

Shift

dBm

Range

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Graphics setting view
Channel

Shift

dBV

Range


Brief information

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



   

Spectrum of IMD SMPTE vs Level DIY SM (as headphone amplifier)

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Graphics setting view
Channel

Level

Range

Range

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Channel

Level

Range

Range

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Graphics setting view
Channel

Shift

Range

dBm

Range

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Graphics setting view
Channel

Shift

Range

dBV

Range


Brief information

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



   

Spectrum of IMD CCIF vs Level DIY SM (as headphone amplifier)

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Graphics setting view
Channel

Level

Range

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Graphics setting view
Channel

Level

Range

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Graphics setting view
Channel

Shift

dBm

Range

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Graphics setting view
Channel

Shift

dBV

Range


Brief information

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





More detailed

Measurements of DIY SM were carried out by Roman Kuznetsov on the hardware-software complex RAA.

The DIY SM test was conducted as a black box test, without regard to cost and prestige. This is the basic principle for making measurements, measurement reports and developing tests in RAA.

I believe that it is important to do not make an absolute assessment of the device, but an aggregate assessment when working together with a headphones and taking into account external factors. This allows you to effectively reveal the potential of the entire set of devices or to make a more optimal choice of components.




Kuznetsov Roman
Founder of RAA



Known by the nickname romanrex
Аuthor of articles iXBT.com



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DIY SM is available in reports and services. You are in a professional report.

Information for entry level users


Information for professionals









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