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2013-Feb

Measurements SONY PHA-1

Nick Name: Golden Ears Registered Date: Feb 20, 2013, 23:58:41 IP ADRESS: *.56.123.5 Views: 23895

00.SONY_PHA-1_measure.jpg

 

 

Related Articles

* Golden Ears Philosophy

* How we measure (Phones, DAPs, Amplifiers)

* How to read measurements - Phones, DAPs, Amplifiers

* Distortion and the data

*Frequency response & perceived sound  

 

Note.

Please keep in mind that the following data are from a test unit reviewed by Golden Ears - the test unit is not necessarily a representative sample of the model being reviewed.

 

 

Line out

1. Digital Input Test

1.1. USB Input 

01.FR_USB_LOW_24_96_SONY_PHA-1.png

Sampling Frequency : 96kHz / SONY - PHA-1 

 

02.TB_USB_LOW_24_96_SONY_PHA-1.png

Test Mode : 24bit, 96kHz

 

03.TB_USB_LOW_com_SONY_PHA-1.png

 

  

1.2. iPod touch (3G) digital Input (16bit/44kHz)

07.FR_iPod_LOW_16_44_SONY_PHA-1.png

Sampling Frequency : 44kHz / SONY - PHA-1

 

08.TB_iPod_LOW_16_44_SONY_PHA-1.png

Test Mode : 16bit, 44kHz

 

09.TB_COM_LOW_16_44_SONY_PHA-1.png

 

 

2. Analog Input Test

2.1.iPod touch (3G) analogue Input  

13.FR_iPod-analogue.png

Sampling Frequency : 44kHz / SONY - PHA-1

 

13.TB_iPod-analogue.png

  

 

Headphone out

A given headphone output may accommodate many different headphones - in general, a smaller load impedance (on headphones) will lead to a larger sound, but at cost of accuracy in measurable data due to the increased current - this cost usually manifests in an increasingly weak bass and elevated crosstalk values as the load impedance decreases. The purpose of the tests to follow is to see how these values change as a function of impedance.

  

1. Headphone Output 

10.FR_LOAD_24_44_SONY_PHA-1.png

R16:16Ω / R33:33Ω / R62:62Ω / R250:250Ω

Sampling Frequency : 44.1kHz / SONY - PHA-1

 

11.TB_LOAD_24_44_SONY_PHA-1.png

R16:16Ω / R33:33Ω / R62:62Ω / R250:250Ω

Test Mode : 24bit, 44.1kHz  

 

 

Output Impedance

A lower impedance is desirable on the headphone outputs of amplifiers. The output impedance is closely related to the damping factor, and is one of the most important parameters that determine headphones' performance - desktop amps tend to exhibit high impedance values, corresponding to poor performance.

 

*  Interaction between output impedance and phones

 

12.IG.PNG

 Creative Commons License
Images, text and measured data by Golden Ears Corporation is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Unported License.

 

Golden Ears Test System - for more information (Link)
1. HATS: Bruel & Kjær - Head and Torso Simulator Type 4128C
2. Microphone Amplifier: Bruel & Kjær - NEXUS Conditioning Amplifier 
3. Audio Interface: Lynx L22
4. DAC: Golden Ears D/A Converter
5. Headphone Amplifier: Golden Ears Headphone Amplifier 

How we test
1. Headphone / Earphone
2. Speaker
3. Amplifier / DAP
 

How to read G.E. Graph
1. Earphone / Headphone
2. Speaker (Directivity Pattern)
3. DAP / Amplifier

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