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Apple iPad Audio Measurements
First Generation (2010-2011)

© 2011 KenRockwell.com. All rights reserved.

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Apple iPad

Apple iPad. This site's main source of support is when you use these links, especially this one to the iPad at Amazon, when you get anything, regardless of the country in which you live. Thanks! Ken.

 

May 2011   All Reviews    Audio Reviews   Apple Reviews

How to Play DVD Movies on your iPad, iPod Touch or iPhone.

A Recording Engineer's Guide to the Secrets of iTunes and iPod.

 

adorama

 
B&H Photo - Video - Pro Audio

Ritz Camera

I use Adorama, Amazon, Ritz, B&H, Calumet, J&R and ScanCafe. I can't vouch for ads below.

Output Voltage

Maximum gain, 0 dB FS at 1 kHz, Tektronix TX3:

 

Unloaded

Left Channel

0.9509 V RMS.

-0.44 dBV.

1.78 dBu.

 

Right Channel

0.9439 V RMS.

-0.50 dBV.

1.72 dBu.

 

75Ω load

Left Channel

0.8931 V RMS.

-0.98 dBV.

1.24 dBu.

 

Right Channel

0.8839 V RMS.

-1.07 dBV.

1.15 dBu.

 

Left/Right Channel Balance

0.06 dB at full gain, unloaded.

0.09 dB at full gain, 75Ω load.

 

Output Impedance

Loaded with a Tektronix 75Ω ±0.025% termination versus the unloaded input of the Tektronix TX3, the output voltage drops to 93.7825%.

Algebra tells us that the source impedance is 5 Ω at 1 kHz.

 

Frequency Response

Signal: -20 dB FS sine wave, 44.1 k samples per second, 1,411 k bits per second AIFF file on iPod Touch.

iPod at maximum gain.

 

100 kΩ analyzer load

5 Hz: -0.2 dB

8 Hz: -0.1 dB

10 Hz: 0.0 dB

20 Hz: 0.0 dB

50 Hz: 0.0 dB

100 Hz: 0.0 dB

200 Hz: 0.0 dB

500 Hz: 0.0 dB

1 kHz: 0.0 dB

2 kHz: 0.0 dB

5 kHz: 0.0 dB

7 kHz: 0.0 dB

10 kHz: 0.0 dB

12.5 kHz: 0.0 dB

15 kHz: -0.05 dB

17.5 kHz: 0.0 dB

20 kHz: 0.0 dB

22 kHz: -0.35 dB

 

75Ω load

5 Hz: -0.2 dB

8 Hz: -0.1 dB

10 Hz: 0.0 dB

20 Hz: 0.0 dB

50 Hz: 0.0 dB

100 Hz: 0.0 dB

200 Hz: 0.0 dB

500 Hz: 0.0 dB

1 kHz: 0.0 dB

2 kHz: 0.0 dB

5 kHz: 0.0 dB

7 kHz: -0.1 dB

10 kHz: -0.4 dB

12.5 kHz: -0.4 dB

15 kHz: -0.6 dB

17.5 kHz: -0.7 dB

20 kHz: -0.9 dB

22 kHz: -1.3 dB

 

Signal-to-Noise Ratio

103 dB, 400 Hz - 30 kHz band, maximum gain, paused, 100 kΩ load.

101 dB, 5 Hz - 30 kHz band unweighted, maximum gain, paused, 100 kΩ load.

 

THD + Noise

Source: 128 kbps AAC file created in iTunes from a 44.1 kHz Rohde & Schwarz test CD, 1 kHz, 0 dB FS played on iPod Touch.

iPod Touch set to maximum gain.

 

100 kΩ analyzer load

0.02% THD + N, 30 kHz measurement bandwidth.

0.067%, 80 kHz measurement bandwidth.

0.86%, 700 kHz measurement bandwidth.

 

75Ω load:

0.025% THD + N, 30 kHz measurement bandwidth.

0.052%, 80 kHz measurement bandwidth.

0.59%, 700 kHz measurement bandwidth.

 

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