Advertisement
Total Articles 5

10

2011-Aug

Measurements G.E. Review Template for DACs & Amplifiers

Nick Name: Golden Ears Registered Date: Aug 10, 2011, 22:31:04 IP ADRESS: *.56.123.5 Views: 9699

Company Model Measurements

 

 

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.

 

<amplifier>The internal mixer was configured so as to counteract the amplifier’s gain, which was set to 3 for this test.

 

Line out

1. Digital Input Test

1.1. XLR Input (AES/EBU)

 

<Insert Frequency Response Graph>

Sampling Frequency : 96kHz / Company Name - Model Name

 

<Insert RMAA Summary Table>

Test Mode : 24bit, 96kHz

 

<Insert RMAA Comparison Table>

Test Mode : 24bit, 44.1/96/192kHz

 

 

1.2. Coaxial Input (SPDIF)

<Insert Frequency Response Graph>

Sampling Frequency : 96kHz / Company Name - Model Name

 

<Insert RMAA Summary Table>

Test Mode : 24bit, 96kHz

 

<Insert RMAA Comparison Table>

Test Mode : 24bit, 44.1/96/192kHz

 

1.3. Optical Input (SPDIF)

<Insert Frequency Response Graph>

Sampling Frequency : 96kHz / Company Name - Model Name

 

<Insert RMAA Summary Table>

Test Mode : 24bit, 96kHz

 

<Insert RMAA Comparison Table>

Test Mode : 24bit, 44.1/96/192kHz

 

1.4. USB Input

<Insert Frequency Response Graph>

Sampling Frequency : 96kHz / Company Name - Model Name

 

<Insert RMAA Summary Table>

Test Mode : 24bit, 96kHz

 

<Insert RMAA Comparison Table>

Test Mode : 24bit, 44.1/96/192kHz

 

 

2. Analog Input Test

2.1. RCA Input

<Insert Frequency Response Graph>

Sampling Frequency : 96kHz / Company Name - Model Name

 

<Insert RMAA Summary Table>

Test Mode : 24bit, 96kHz 

 

 

 

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

 

<Insert Frequency Response Graph / R16 ~ R250>

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

Sampling Frequency : 44.1kHz / Company Name - Model Name

 

<Insert RMAA Summary Table / R16 ~ R250>

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

 

<Insert Output Impedance Value Table>

 

 

 

 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

Tag
Attachment
List of Articles
No. Subject Nick Name Date Views
  • Registered Date: Aug 10, 2011

9699

VIEWS

  • Registered Date: Aug 10, 2011

6612

VIEWS

  • Registered Date: Aug 10, 2011

8970

VIEWS

  • Registered Date: Aug 10, 2011

11787

VIEWS

  • Registered Date: Aug 10, 2011

7492

VIEWS