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2011-Nov

Measurements Apple iPad2

Nick Name: Golden Ears Registered Date: Nov 25, 2011, 00:44:19 IP ADRESS: *.56.123.5 Views: 15745

00.Apple_iPad2_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.

 

Decoder Test

 1. WAV Test Result (Lossless File) 

01.FR_Wav.png

Sampling Frequency : 44.1kHz / Apple - iPad2

 

02.TBL_Wav.png

Test Mode : 24bit, 44.1kHz

 

 

2. Apple LosslessTest Result (Lossless File)

03.FR_AppleLOSSLESS.png

Sampling Frequency : 44.1kHz /  Apple - iPad2

 

04.TBL_AppleLOSSLESS.png

Test Mode : 24bit, 44.1kHz

 

3. AAC Test Result

05.FR_AAC.png

Sampling Frequency : 44.1kHz /  Apple - iPad2

 

06.TBL_AAC.png

Test Mode : 24bit, 44.1kHz

 

 

4. MP3 Test Result

07.FR_MP3.png

Sampling Frequency : 44.1kHz /  Apple - iPad2

 

08.TBL_MP3.png

Test Mode : 24bit, 44.1kHz

  

 

Amplifier Test

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.

 

 

09.FR_LOAD.png

R33:33Ω / R62:62Ω / R250:250Ω

Sampling Frequency : 44.1kHz /  Apple - iPad2

 

10.TBL_LOAD.png

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

  

 11.IG.PNG

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2017.11.23 10:31
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مع دخول موسم الصيف تبدا درجات الحرارة في الارتفاع مما يسبب في انتشار الحشرات سواء اكانت حشرات زاحفة او حشرات طائرة مما يسبب تلوث الطعام وامراض خطيرة تصل للتيفود لذا ينصح دائما بالاستعانة بـشركة تويكسات في السعودية لشهرتها الكبيرة بانها افضل شركة مكافحة حشرات بالرياض لان الخبراء لديهم الاماكنية الكافية والخبرة في وسائل وطرق إبادة الحشرات لانها تعد أيضا افضل شركة رش مبيدات بالرياض
حرصا على صحتكم يرجى عدم اهمال إبادة الحشرات والتخلص منها والاستعانة بخبراء إبادة ومكافحة الحشرات ولا تقتصر خدمانتا فقط في تويكسات على منطقة الرياض فقط بل نشتهر أيضا باننا أيضا افضل شركة مكافحة حشرات بالاحساء لأننا نستخدم وسائل وطرق إبادة حشرات ثابت فعاليتها بالإضافة الى استخدمنا افضل مبيدات رش الحشرات وشهرتنا كافضل شركة رش مبيدات بالاحساء 

لاتتردد في التواصل مع افضل شركة مكافحة حشرات بالرياض
شعارنا : الأمانة – خدمة عالية – أسعار اقتصادية


رابط الموقع : شركة مكافحة حشرات بالرياض

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