Home Donate New Search Gallery Reviews How-To Books Links Workshops About Contact Apple iPad Audio Measurements 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.
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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